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copper conducts</title> <meta name="description" content="Search results for: brazed copper conducts"> <meta name="keywords" content="brazed copper conducts"> <meta name="viewport" content="width=device-width, initial-scale=1, minimum-scale=1, maximum-scale=1, user-scalable=no"> <meta charset="utf-8"> <link href="https://cdn.waset.org/favicon.ico" type="image/x-icon" rel="shortcut icon"> <link href="https://cdn.waset.org/static/plugins/bootstrap-4.2.1/css/bootstrap.min.css" rel="stylesheet"> <link href="https://cdn.waset.org/static/plugins/fontawesome/css/all.min.css" rel="stylesheet"> <link href="https://cdn.waset.org/static/css/site.css?v=150220211555" rel="stylesheet"> </head> <body> <header> <div class="container"> <nav class="navbar navbar-expand-lg navbar-light"> <a class="navbar-brand" href="https://waset.org"> <img src="https://cdn.waset.org/static/images/wasetc.png" alt="Open Science Research Excellence" title="Open Science Research Excellence" /> </a> <button class="d-block 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action="https://publications.waset.org/abstracts/search"> <div id="custom-search-input"> <div class="input-group"> <i class="fas fa-search"></i> <input type="text" class="search-query" name="q" placeholder="Author, Title, Abstract, Keywords" value="brazed copper conducts"> <input type="submit" class="btn_search" value="Search"> </div> </div> </form> </div> </div> <div class="row mt-3"> <div class="col-sm-3"> <div class="card"> <div class="card-body"><strong>Commenced</strong> in January 2007</div> </div> </div> <div class="col-sm-3"> <div class="card"> <div class="card-body"><strong>Frequency:</strong> Monthly</div> </div> </div> <div class="col-sm-3"> <div class="card"> <div class="card-body"><strong>Edition:</strong> International</div> </div> </div> <div class="col-sm-3"> <div class="card"> <div class="card-body"><strong>Paper Count:</strong> 951</div> </div> </div> </div> <h1 class="mt-3 mb-3 text-center" style="font-size:1.6rem;">Search results for: brazed copper conducts</h1> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">951</span> Investigation on Corrosion Behavior of Copper Brazed Joints</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=A.%20M.%20Aminazad">A. M. Aminazad</a>, <a href="https://publications.waset.org/abstracts/search?q=A.%20M.%20Hadian"> A. M. Hadian</a>, <a href="https://publications.waset.org/abstracts/search?q=F.%20Ghasimakbari"> F. Ghasimakbari</a> </p> <p class="card-text"><strong>Abstract:</strong></p> DHP (Deoxidized High Phosphorus )copper is widely used in various heat transfer units such as, air conditioners refrigerators, evaporators and condensers. Copper sheets and tubes (ISODHP) were brazed with four different brazing alloys. Corrosion resistances of the joints were examined by polarization and salt spray tests. The selected fillers consisted of three silver-based brazing alloys (hard solder); AWS-BCu5 BAg8, DINLAg30, and a copper-based filler AWS BCuP2. All the joints were brazed utilizing four different brazing processes including furnace brazing under argon, vacuum, air atmosphere and torch brazing. All of the fillers were used with and without flux. The microstructure of the brazed sheets was examined using both optical and scanning electron microscope (SEM). Hardness and leak tests were carried out on all the brazed tubes. In all three silver brazing alloys selective and galvanic corrosion were observed in filler metals, but in copper phosphor alloys the copper adjacent to the joints were noticeably corroded by pitting method. Microstructure of damaged area showed selective attack of copper lamellae as well. Interfacial attack was observed along boundaries as well as copper attack within the filler metal itself. It was found that the samples brazed with BAg5 filler metal using vacuum furnace show a higher resistance to corrosion. They also have a good ductility in the brazed zone. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=copper" title="copper">copper</a>, <a href="https://publications.waset.org/abstracts/search?q=brazing" title=" brazing"> brazing</a>, <a href="https://publications.waset.org/abstracts/search?q=corrosion" title=" corrosion"> corrosion</a>, <a href="https://publications.waset.org/abstracts/search?q=filler%20metal" title=" filler metal"> filler metal</a> </p> <a href="https://publications.waset.org/abstracts/24596/investigation-on-corrosion-behavior-of-copper-brazed-joints" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/24596.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">471</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">950</span> Comparison of Mechanical Property of UNS C12200Joints Brazed by (Cu&Ag) Based Filler Metals</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Ali%20Elhatmi">Ali Elhatmi</a>, <a href="https://publications.waset.org/abstracts/search?q=Mustafa%20Elshbo"> Mustafa Elshbo</a>, <a href="https://publications.waset.org/abstracts/search?q=Hussin%20Alosta"> Hussin Alosta</a> </p> <p class="card-text"><strong>Abstract:</strong></p> In this study the coper tube witch used in medical applications was brazed by Copper, Zink and Silver alloys, using BCuP2, RBCuZnAl and BAg2 filler metals. The sample of the medical tubes was chemically analyzed and the result matches the British standard. Tensile and hardness tests were carried out for brazed joints, and the tensile test results show that the BCuP2 has the hardest and the filler metal RBCuZnAl has the highest tensile strength. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=welding" title="welding">welding</a>, <a href="https://publications.waset.org/abstracts/search?q=Brazing" title=" Brazing"> Brazing</a>, <a href="https://publications.waset.org/abstracts/search?q=Copper%20tubes" title=" Copper tubes"> Copper tubes</a>, <a href="https://publications.waset.org/abstracts/search?q=Joints" title=" Joints"> Joints</a> </p> <a href="https://publications.waset.org/abstracts/92026/comparison-of-mechanical-property-of-uns-c12200joints-brazed-by-cuag-based-filler-metals" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/92026.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">228</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">949</span> Corrosion Analysis of Brazed Copper-Based Conducts in Particle Accelerator Water Cooling Circuits</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=A.%20T.%20Perez%20Fontenla">A. T. Perez Fontenla</a>, <a href="https://publications.waset.org/abstracts/search?q=S.%20Sgobba"> S. Sgobba</a>, <a href="https://publications.waset.org/abstracts/search?q=A.%20Bartkowska"> A. Bartkowska</a>, <a href="https://publications.waset.org/abstracts/search?q=Y.%20Askar"> Y. Askar</a>, <a href="https://publications.waset.org/abstracts/search?q=M.%20Dalemir%20Celuch"> M. Dalemir Celuch</a>, <a href="https://publications.waset.org/abstracts/search?q=A.%20Newborough"> A. Newborough</a>, <a href="https://publications.waset.org/abstracts/search?q=M.%20Karppinen"> M. Karppinen</a>, <a href="https://publications.waset.org/abstracts/search?q=H.%20Haalien"> H. Haalien</a>, <a href="https://publications.waset.org/abstracts/search?q=S.%20Deleval"> S. Deleval</a>, <a href="https://publications.waset.org/abstracts/search?q=S.%20Larcher"> S. Larcher</a>, <a href="https://publications.waset.org/abstracts/search?q=C.%20Charvet"> C. Charvet</a>, <a href="https://publications.waset.org/abstracts/search?q=L.%20Bruno"> L. Bruno</a>, <a href="https://publications.waset.org/abstracts/search?q=R.%20Trant"> R. Trant</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The present study investigates the corrosion behavior of copper (Cu) based conducts predominantly brazed with Sil-Fos (self-fluxing copper-based filler with silver and phosphorus) within various cooling circuits of demineralized water across different particle accelerator components at CERN. The study covers a range of sample service time, from a few months to fifty years, and includes various accelerator components such as quadrupoles, dipoles, and bending magnets. The investigation comprises the established sample extraction procedure, examination methodology including non-destructive testing, evaluation of the corrosion phenomena, and identification of commonalities across the studied components as well as analysis of the environmental influence. The systematic analysis included computed microtomography (CT) of the joints that revealed distributed defects across all brazing interfaces. Some defects appeared to result from areas not wetted by the filler during the brazing operation, displaying round shapes, while others exhibited irregular contours and radial alignment, indicative of a network or interconnection. The subsequent dry cutting performed facilitated access to the conduct's inner surface and the brazed joints for further inspection through light and electron microscopy (SEM) and chemical analysis via Energy Dispersive X-ray spectroscopy (EDS). Brazing analysis away from affected areas identified the expected phases for a Sil-Fos alloy. In contrast, the affected locations displayed micrometric cavities propagating into the material, along with selective corrosion of the bulk Cu initiated at the conductor-braze interface. Corrosion product analysis highlighted the consistent presence of sulfur (up to 6 % in weight), whose origin and role in the corrosion initiation and extension is being further investigated. The importance of this study is paramount as it plays a crucial role in comprehending the underlying factors contributing to recently identified water leaks and evaluating the extent of the issue. Its primary objective is to provide essential insights for the repair of impacted brazed joints when accessibility permits. Moreover, the study seeks to contribute to the improvement of design and manufacturing practices for future components, ultimately enhancing the overall reliability and performance of magnet systems within CERN accelerator facilities. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=accelerator%20facilities" title="accelerator facilities">accelerator facilities</a>, <a href="https://publications.waset.org/abstracts/search?q=brazed%20copper%20conducts" title=" brazed copper conducts"> brazed copper conducts</a>, <a href="https://publications.waset.org/abstracts/search?q=demineralized%20water" title=" demineralized water"> demineralized water</a>, <a href="https://publications.waset.org/abstracts/search?q=magnets" title=" magnets"> magnets</a> </p> <a href="https://publications.waset.org/abstracts/182261/corrosion-analysis-of-brazed-copper-based-conducts-in-particle-accelerator-water-cooling-circuits" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/182261.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">48</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">948</span> The Influence of Brazing Method on Corrosion Behavior of Brazed Aluminum Joints</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=F.%20Ghasim-akbari">F. Ghasim-akbari</a>, <a href="https://publications.waset.org/abstracts/search?q=A.%20M.%20Hadian"> A. M. Hadian</a>, <a href="https://publications.waset.org/abstracts/search?q=A.%20M.%20Aminazad"> A. M. Aminazad</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Fluid transmission pipes made of aluminum are widely use in petrochemical industries. For many applications they have to be brazed to each other. The brazed joints, in many cases, are encountered with corrosive medias. This paper reports a part of a work to investigate the corrosion behavior of brazed Al6061 using Al4047 as filler metal with and without the use of flux to discover the effect of different brazing atmospheres. The samples brazed under air, vacuum, argon, and hydrogen atmospheres. The interfacial area of the joints was examined to ensure being free of any defects. The sides of each test piece were covered with insulator and the surface of the joint was encountered to polarization test. The results revealed a significant difference of corrosion resistance. The samples that brazed under argon and hydrogen atmospheres had better corrosion resistance than other samples. Microstructure of the corroded joints revealed that the amount of the filler metal is a critical parameter on corrosion resistance of the joints. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=brazing" title="brazing">brazing</a>, <a href="https://publications.waset.org/abstracts/search?q=corrosion%20behavior" title=" corrosion behavior"> corrosion behavior</a>, <a href="https://publications.waset.org/abstracts/search?q=Al6061" title=" Al6061"> Al6061</a>, <a href="https://publications.waset.org/abstracts/search?q=polarization" title=" polarization"> polarization</a> </p> <a href="https://publications.waset.org/abstracts/24594/the-influence-of-brazing-method-on-corrosion-behavior-of-brazed-aluminum-joints" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/24594.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">498</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">947</span> Facile Synthesis of Copper Based Nanowires Suitable for Lithium Ion Battery Application</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Zeinab%20Sanaee">Zeinab Sanaee</a>, <a href="https://publications.waset.org/abstracts/search?q=Hossein%20Jafaripour"> Hossein Jafaripour</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Copper is an excellent conductive material that is widely used in the energy devices such as Lithium-ion batteries and supercapacitors as the current collector. On the other hand, copper oxide nanowires have been used in these applications as potential electrode material. In this paper, nanowires of Copper and Copper oxide have been synthesized through a simple and time and cost-effective approach. The thermally grown Copper oxide nanowires have been converted into Copper nanowires through annealing in the Hydrogen atmosphere in a DC-PECVD system. To have a proper Copper nanostructure formation, an Au nanolayer was coated on the surface of Copper oxide nanowires. The results show the successful achievement of Copper nanowires without deformation or cracking. These structures have a great potential for Lithium-ion batteries and supercapacitors. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=Copper" title="Copper">Copper</a>, <a href="https://publications.waset.org/abstracts/search?q=Copper%20oxide" title=" Copper oxide"> Copper oxide</a>, <a href="https://publications.waset.org/abstracts/search?q=nanowires" title=" nanowires"> nanowires</a>, <a href="https://publications.waset.org/abstracts/search?q=Hydrogen%20annealing" title=" Hydrogen annealing"> Hydrogen annealing</a>, <a href="https://publications.waset.org/abstracts/search?q=Lithium%20ion%20battery" title=" Lithium ion battery"> Lithium ion battery</a> </p> <a href="https://publications.waset.org/abstracts/158298/facile-synthesis-of-copper-based-nanowires-suitable-for-lithium-ion-battery-application" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/158298.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">87</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">946</span> Characteristics and Mechanical Properties of Bypass-Current MIG Welding-Brazed Dissimilar Al/Ti Joints</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Bintao%20Wu">Bintao Wu</a>, <a href="https://publications.waset.org/abstracts/search?q=Xiangfang%20Xu"> Xiangfang Xu</a>, <a href="https://publications.waset.org/abstracts/search?q=Yugang%20Miao%EF%BC%8CDuanfeng%20Han"> Yugang Miao，Duanfeng Han</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Joining of 1 mm thick aluminum 6061 to titanium TC4 was conducted using Bypass-current MIG welding-brazed, and stable welding process and good bead appearance were obtained. The Joint profile and microstructure of Ti/Al joints were observed by optical microscopy and SEM and then the structure of the interfacial reaction layers were analyzed in details. It was found that the intermetallic compound layer at the interfacial top is in the form of columnar crystal, which is in short and dense state. A mount of AlTi were observed at the interfacial layer near the Ti base metal while intermetallic compound like Al3Ti、TiSi3 were formed near the Al base metal, and the Al11Ti5 transition phase was found in the center of the interface layer due to the uneven distribution inside the weld pool during the welding process. Tensile test results show that the average tensile strength of joints is up to 182.6 MPa, which reaches about 97.6% of aluminum base metal. Fracture is prone to occur in the base metal with a certain amount of necking. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=bypass-current%20MIG%20welding-brazed" title="bypass-current MIG welding-brazed">bypass-current MIG welding-brazed</a>, <a href="https://publications.waset.org/abstracts/search?q=Al%20alloy" title=" Al alloy"> Al alloy</a>, <a href="https://publications.waset.org/abstracts/search?q=Ti%20alloy" title=" Ti alloy"> Ti alloy</a>, <a href="https://publications.waset.org/abstracts/search?q=joint%20characteristics" title=" joint characteristics"> joint characteristics</a>, <a href="https://publications.waset.org/abstracts/search?q=mechanical%20properties" title=" mechanical properties"> mechanical properties</a> </p> <a href="https://publications.waset.org/abstracts/17396/characteristics-and-mechanical-properties-of-bypass-current-mig-welding-brazed-dissimilar-alti-joints" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/17396.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">264</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">945</span> Boiling Heat Transfer Enhancement Using Hydrophilic Millimeter Copper Free Particles</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Abbasali%20Abouei%20Mehrizi">Abbasali Abouei Mehrizi</a>, <a href="https://publications.waset.org/abstracts/search?q=Hao%20Wang"> Hao Wang</a>, <a href="https://publications.waset.org/abstracts/search?q=Leping%20Zhou"> Leping Zhou</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Modification of surface wettability is one of the conventional approaches to manipulate the boiling heat transfer. Instead of direct surface modification, in the present study, the surface is decorated with free copper particles with different hydrophobicity. We used millimeter-sized copper particles with two different hydrophobicity. The surface is covered with untreated, hydrophilic, and a combination of hydrophobic and hydrophilic copper particles separately, and the heat flux and wall superheat temperature was measured experimentally and compared with the bare polished copper surface. The results show that the untreated copper particles can slightly improve the boiling heat transfer when the hydrophilic copper particles have better performance. Combining hydrophilic and hydrophobic copper particles reduces boiling heat transfer. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=boiling%20heat%20transfer" title="boiling heat transfer">boiling heat transfer</a>, <a href="https://publications.waset.org/abstracts/search?q=copper%20balls" title=" copper balls"> copper balls</a>, <a href="https://publications.waset.org/abstracts/search?q=hydrophobic" title=" hydrophobic"> hydrophobic</a>, <a href="https://publications.waset.org/abstracts/search?q=hydrophilic" title=" hydrophilic"> hydrophilic</a> </p> <a href="https://publications.waset.org/abstracts/163360/boiling-heat-transfer-enhancement-using-hydrophilic-millimeter-copper-free-particles" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/163360.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">71</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">944</span> Effect of Edta in the Phytoextraction of Copper by Terminalia catappa (Talisay) Linnaeus</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Ian%20Marc%20G.%20Cabugsa">Ian Marc G. Cabugsa</a>, <a href="https://publications.waset.org/abstracts/search?q=Zarine%20M.%20Hermita"> Zarine M. Hermita</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Phytoextraction capability of T. catappa in contaminated soils was done in the improvised greenhouse. The plant samples were planted to the soil which contained different concentrations of copper. Chelating agent EDTA was added to observe the uptake and translocation of copper in the plant samples. Results showed a significant increase of copper accumulation with the addition of EDTA at 250 and 1250 mgˑkg-1 concentration of copper in the contaminated soils (p<0.05). While translocation of copper was observed in all treatments, translocation of copper is not significantly enhanced by the addition of EDTA (p>0.05). Uptake and translocation were not directly affected the presence of EDTA. Furthermore, this study suggests that the T. catappa is not a hyperaccumulator of copper, and there is no relationship observed between the length of the plant and the copper uptake in all treatments. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=chelating%20agent%20EDTA" title="chelating agent EDTA">chelating agent EDTA</a>, <a href="https://publications.waset.org/abstracts/search?q=hyperaccumulator" title=" hyperaccumulator"> hyperaccumulator</a>, <a href="https://publications.waset.org/abstracts/search?q=phytoextraction" title=" phytoextraction"> phytoextraction</a>, <a href="https://publications.waset.org/abstracts/search?q=phytoremediation" title=" phytoremediation"> phytoremediation</a>, <a href="https://publications.waset.org/abstracts/search?q=terminalia%20catappa" title=" terminalia catappa"> terminalia catappa</a> </p> <a href="https://publications.waset.org/abstracts/17719/effect-of-edta-in-the-phytoextraction-of-copper-by-terminalia-catappa-talisay-linnaeus" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/17719.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">385</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">943</span> Copper Removal from Synthetic Wastewater by a Novel Fluidized-bed Homogeneous Crystallization (FBHC) Technology</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Cheng-Yen%20Huang">Cheng-Yen Huang</a>, <a href="https://publications.waset.org/abstracts/search?q=Yu-Jen%20Shih"> Yu-Jen Shih</a>, <a href="https://publications.waset.org/abstracts/search?q=Ming-Chun%20Yen"> Ming-Chun Yen</a>, <a href="https://publications.waset.org/abstracts/search?q=Yao-Hui%20Huang"> Yao-Hui Huang</a> </p> <p class="card-text"><strong>Abstract:</strong></p> This research developed a fluidized-bed homogeneous crystallization (FBHC) process to remove copper from synthetic wastewater in terms of recovery of highly pure malachite (Cu2(OH)2CO3) pellets. The experimental parameters of FBHC which included pH, molar ratio of copper to carbonate, copper loading, upper flowrate and bed height were tested in the absence of seed particles. Under optimized conditions, both the total copper removal (TR) and crystallization ratio (CR) reached 99%. The malachite crystals were characterized by XRD and SEM. FBHC was capable of treating concentrated copper (1600 ppm) wastewater and minimizing the sludge production. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=copper" title="copper">copper</a>, <a href="https://publications.waset.org/abstracts/search?q=carbonate" title=" carbonate"> carbonate</a>, <a href="https://publications.waset.org/abstracts/search?q=fluidized-bed" title=" fluidized-bed"> fluidized-bed</a>, <a href="https://publications.waset.org/abstracts/search?q=crystallization" title=" crystallization"> crystallization</a>, <a href="https://publications.waset.org/abstracts/search?q=malachite" title=" malachite"> malachite</a> </p> <a href="https://publications.waset.org/abstracts/46878/copper-removal-from-synthetic-wastewater-by-a-novel-fluidized-bed-homogeneous-crystallization-fbhc-technology" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/46878.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">423</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">942</span> Synthesis of Bimetallic Fe/Cu Nanoparticles with Different Copper Loading Ratios</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=May%20Thant%20Zin">May Thant Zin</a>, <a href="https://publications.waset.org/abstracts/search?q=Josephine%20Borja"> Josephine Borja</a>, <a href="https://publications.waset.org/abstracts/search?q=Hirofumi%20Hinode"> Hirofumi Hinode</a>, <a href="https://publications.waset.org/abstracts/search?q=Winarto%20Kurniawan"> Winarto Kurniawan</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Nanotechnology has multiple and enormous advantages for all application. Therefore, this research is carried out to synthesize and characterize bimetallic iron with copper nano-particles. After synthesizing nano zero valent iron by reduction of ferric chloride by sodium borohydride under nitrogen purging environment, bimetallic iron with copper nanoparticles are synthesized by varying different loads of copper chloride. Due to different standard potential (E0) values of copper and iron, copper is coupled with iron at (Cu to Fe ratio of 1:5, 1:6.7, 1:10, 1:20). It is found that the resulted bimetallic Fe/Cu nanoparticles are composing phases of iron and copper. According to the diffraction patterns indicating the state of chemical combination of the bimetallic nanoparticles, the particles are well-combined and crystalline sizes are less than 1000 Ao (or 100 nm). Specifically, particle sizes of synthesized bimetallic Fe/Cu nanoparticles are ranging from 44.583 nm to 85.149 nm. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=" title=""></a> </p> <a href="https://publications.waset.org/abstracts/3276/synthesis-of-bimetallic-fecu-nanoparticles-with-different-copper-loading-ratios" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/3276.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">446</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">941</span> The Optimization of Copper Sulfate and Tincalconite Molar Ratios on the Hydrothermal Synthesis of Copper Borates</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=E.%20Moroydor%20Derun">E. Moroydor Derun</a>, <a href="https://publications.waset.org/abstracts/search?q=N.%20Tugrul"> N. Tugrul</a>, <a href="https://publications.waset.org/abstracts/search?q=F.%20T.%20Senberber"> F. T. Senberber</a>, <a href="https://publications.waset.org/abstracts/search?q=A.%20S.%20Kipcak"> A. S. Kipcak</a>, <a href="https://publications.waset.org/abstracts/search?q=S.%20Piskin"> S. Piskin</a> </p> <p class="card-text"><strong>Abstract:</strong></p> In this research, copper borates are synthesized by the reaction of copper sulfate pentahydrate (CuSO4.5H2O) and tincalconite (Na2O4B7.10H2O). The experimental parameters are selected as 80°C reaction temperature and 60 of reaction time. The effect of mole ratio of CuSO4.5H2O to Na2O4B7.5H2O is studied. For the identification analyses X-Ray Diffraction (XRD) and Fourier Transform Infrared Spectroscopy (FT-IR) techniques are used. At the end of the experiments, synthesized copper borate is matched with the powder diffraction file of “00-001-0472” [Cu(BO2)2] and characteristic vibrations between B and O atoms are seen. The proper crystals are obtained at the mole ratio of 3:1. This study showed that simplified synthesis process is suitable for the production of copper borate minerals. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=hydrothermal%20synthesis" title="hydrothermal synthesis">hydrothermal synthesis</a>, <a href="https://publications.waset.org/abstracts/search?q=copper%20borates" title=" copper borates"> copper borates</a>, <a href="https://publications.waset.org/abstracts/search?q=copper%20sulfate" title=" copper sulfate"> copper sulfate</a>, <a href="https://publications.waset.org/abstracts/search?q=tincalconite" title=" tincalconite"> tincalconite</a> </p> <a href="https://publications.waset.org/abstracts/16418/the-optimization-of-copper-sulfate-and-tincalconite-molar-ratios-on-the-hydrothermal-synthesis-of-copper-borates" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/16418.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">381</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">940</span> Polyacrylate Modified Copper Nanoparticles with Controlled Size</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Robert%20Prucek">Robert Prucek</a>, <a href="https://publications.waset.org/abstracts/search?q=Ale%C5%A1%20Pan%C3%A1%C4%8Dek"> Aleš Panáček</a>, <a href="https://publications.waset.org/abstracts/search?q=Jan%20Filip"> Jan Filip</a>, <a href="https://publications.waset.org/abstracts/search?q=Libor%20Kv%C3%ADtek"> Libor Kvítek</a>, <a href="https://publications.waset.org/abstracts/search?q=Radek%20Zbo%C5%99il"> Radek Zbořil</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The preparation of Cu nanoparticles (NPs) through the reduction of copper ions by sodium borohydride in the presence of sodium polyacrylate with a molecular weight of 1200 is reported. Cu NPs were synthesized at a concentration of copper salt equal to 2.5, 5, and 10 mM, and at a molar ratio of copper ions and monomeric unit of polyacrylate equal to 1:2. The as-prepared Cu NPs have diameters of about 2.5–3 nm for copper concentrations of 2.5 and 5 mM, and 6 nm for copper concentration of 10 mM. Depending on the copper salt concentration and concentration of additionally added polyacrylate to Cu particle dispersion, primarily formed NPs grow through the process of aggregation and/or coalescence into clusters and/or particles with a diameter between 20–100 nm. The amount of additionally added sodium polyacrylate influences the stability of Cu particles against air oxidation. The catalytic efficiency of the prepared Cu particles for the reduction of 4-nitrophenol is discussed. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=copper" title="copper">copper</a>, <a href="https://publications.waset.org/abstracts/search?q=nanoparticles" title=" nanoparticles"> nanoparticles</a>, <a href="https://publications.waset.org/abstracts/search?q=sodium%20polyacrylate" title=" sodium polyacrylate"> sodium polyacrylate</a>, <a href="https://publications.waset.org/abstracts/search?q=catalyst" title=" catalyst"> catalyst</a>, <a href="https://publications.waset.org/abstracts/search?q=4-nitrophenol" title=" 4-nitrophenol"> 4-nitrophenol</a> </p> <a href="https://publications.waset.org/abstracts/6486/polyacrylate-modified-copper-nanoparticles-with-controlled-size" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/6486.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">278</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">939</span> Electro-Winning of Dilute Solution of Copper Metal from Sepon Mine, Lao PDR</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=S.%20Vasailor">S. Vasailor</a>, <a href="https://publications.waset.org/abstracts/search?q=C.%20Rattanakawin"> C. Rattanakawin</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Electro-winning of copper metal from dilute sulfate solution (13.7 g/L) was performed in a lab electrolytic cell with stainless-steel cathode and lead-alloy anode. The effects of various parameters including cell voltage, electro-winning temperature and time were studied in order to acquire an appropriate current efficiency of copper deposition. The highest efficiency is about 95% obtaining from electro-winning condition of 3V, 55°C and 3,600 s correspondingly. The cathode copper with 95.5% Cu analyzed using atomic absorption spectrometry can be obtained from this single-winning condition. In order to increase the copper grade, solvent extraction should be used to increase the sulfate concentration, say 50 g/L, prior to winning the cathode copper effectively. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=copper%20metal" title="copper metal">copper metal</a>, <a href="https://publications.waset.org/abstracts/search?q=current%20efficiency" title=" current efficiency"> current efficiency</a>, <a href="https://publications.waset.org/abstracts/search?q=dilute%20sulfate%20solution" title=" dilute sulfate solution"> dilute sulfate solution</a>, <a href="https://publications.waset.org/abstracts/search?q=electro-winning" title=" electro-winning"> electro-winning</a> </p> <a href="https://publications.waset.org/abstracts/109027/electro-winning-of-dilute-solution-of-copper-metal-from-sepon-mine-lao-pdr" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/109027.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">138</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">938</span> Parameters Affecting the Removal of Copper and Cobalt from Aqueous Solution onto Clinoptilolite by Ion-Exchange Process</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=John%20Kabuba">John Kabuba</a>, <a href="https://publications.waset.org/abstracts/search?q=Hilary%20Rutto"> Hilary Rutto</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Ion exchange is one of the methods used to remove heavy metal such as copper and cobalt from wastewaters. Parameters affecting the ion-exchange of copper and cobalt aqueous solutions using clinoptilolite are the objectives of this study. Synthetic solutions were prepared with the concentration of 0.02M, 0.06M and 0.1M. The cobalt solution was maintained to 0.02M while varying the copper solution to the above stated concentrations. The clinoptilolite was activated with HCl and H2SO4 for removal efficiency. The pHs of the solutions were found to be acidic hence enhancing the copper and cobalt removal. The natural clinoptilolite performance was also found to be lower compared to the HCl and H2SO4 activated one for the copper removal ranging from 68% to 78% of Cu2+ uptake with the natural clinoptilolite to 66% to 51% with HCl and H2SO4 respectively. It was found that the activated clinoptilolite removed more copper and cobalt than the natural one and found that the electronegativity of the metal plays a role in the metal removal and the clinoptilolite selectivity. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=clinoptilolite" title="clinoptilolite">clinoptilolite</a>, <a href="https://publications.waset.org/abstracts/search?q=cobalt%20and%20copper" title=" cobalt and copper"> cobalt and copper</a>, <a href="https://publications.waset.org/abstracts/search?q=ion-exchange" title=" ion-exchange"> ion-exchange</a>, <a href="https://publications.waset.org/abstracts/search?q=mass%20dosage" title=" mass dosage"> mass dosage</a>, <a href="https://publications.waset.org/abstracts/search?q=pH" title=" pH"> pH</a> </p> <a href="https://publications.waset.org/abstracts/13100/parameters-affecting-the-removal-of-copper-and-cobalt-from-aqueous-solution-onto-clinoptilolite-by-ion-exchange-process" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/13100.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">298</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">937</span> Copper Doped P-Type Nickel Oxide Transparent Conducting Oxide Thin Films</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Kai%20Huang">Kai Huang</a>, <a href="https://publications.waset.org/abstracts/search?q=Assamen%20Ayalew%20Ejigu"> Assamen Ayalew Ejigu</a>, <a href="https://publications.waset.org/abstracts/search?q=Mu-Jie%20Lin"> Mu-Jie Lin</a>, <a href="https://publications.waset.org/abstracts/search?q=Liang-Chiun%20Chao"> Liang-Chiun Chao</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Nickel oxide and copper-nickel oxide thin films have been successfully deposited by reactive ion beam sputter deposition. Experimental results show that nickel oxide deposited at 300°C is single phase NiO while best crystalline quality is achieved with an O_pf of 0.5. XRD analysis of nickel-copper oxide deposited at 300°C shows a Ni2O3 like crystalline structure at low O_pf while changes to NiO like crystalline structure at high O_pf. EDS analysis shows that nickel-copper oxide deposited at low O_pf is CuxNi2-xO3 with x = 1, while nickel-copper oxide deposited at high O_pf is CuxNi1-xO with x = 0.5, which is supported by Raman analysis. The bandgap of NiO is ~ 3.5 eV regardless of O_pf while the band gap of nickel-copper oxide decreases from 3.2 to 2.3 eV as Opf reaches 1.0. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=copper" title="copper">copper</a>, <a href="https://publications.waset.org/abstracts/search?q=ion%20beam" title=" ion beam"> ion beam</a>, <a href="https://publications.waset.org/abstracts/search?q=NiO" title=" NiO"> NiO</a>, <a href="https://publications.waset.org/abstracts/search?q=oxide" title=" oxide"> oxide</a>, <a href="https://publications.waset.org/abstracts/search?q=resistivity" title=" resistivity"> resistivity</a>, <a href="https://publications.waset.org/abstracts/search?q=transparent" title=" transparent"> transparent</a> </p> <a href="https://publications.waset.org/abstracts/58525/copper-doped-p-type-nickel-oxide-transparent-conducting-oxide-thin-films" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/58525.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">312</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">936</span> Solar System with Plate Heat Exchanger</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Christer%20Frennfelt">Christer Frennfelt</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Solar heating is the most environmentally friendly way to heat water. Brazed Plate Heat Exchangers (BPHEs) are a key component in many solar heating applications for harvesting solar energy into accumulator tanks, producing hot tap water, and heating pools. The combination of high capacity in a compact format, efficient heat transfer, and fast response makes the BPHE the ideal heat exchanger for solar thermal systems. Solar heating is common as a standalone heat source, and as an add-on heat source for boilers, heat pumps, or district heating systems. An accumulator provides the possibility to store heat, which enables combination of different heat sources to a larger extent. In turn this works as protection to reduced access to energy or increased energy prices. For example heat from solar panels is preferably stored during the day for use at night. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=district%20heating%20and%20cooling" title="district heating and cooling">district heating and cooling</a>, <a href="https://publications.waset.org/abstracts/search?q=thermal%20storage" title=" thermal storage"> thermal storage</a>, <a href="https://publications.waset.org/abstracts/search?q=brazed%20plate%20heat%20exchanger" title=" brazed plate heat exchanger"> brazed plate heat exchanger</a>, <a href="https://publications.waset.org/abstracts/search?q=solar%20domestic%20hot%20water%20and%20combisystems" title=" solar domestic hot water and combisystems"> solar domestic hot water and combisystems</a> </p> <a href="https://publications.waset.org/abstracts/48183/solar-system-with-plate-heat-exchanger" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/48183.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">351</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">935</span> Characterization of Copper Slag and Jarofix Waste Materials for Road Construction </h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=V.%20K.%20Arora">V. K. Arora</a>, <a href="https://publications.waset.org/abstracts/search?q=V.%20G.%20Havanagi"> V. G. Havanagi</a>, <a href="https://publications.waset.org/abstracts/search?q=A.%20K.%20Sinha"> A. K. Sinha</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Copper slag and Jarofix are waste materials, generated during the manufacture of copper and zinc respectively, which have potential for utility in embankment and road construction. Accordingly, a research project was carried out to study the characteristics of copper slag and Jarofix to utilize in the construction of road. In this study, copper slag and Jarofix were collected from Tuticorin, State of Tamil Nadu and Hindustan Zinc Ltd., Chittorgarh, Rajasthan state, India respectively. These materials were investigated for their physical, chemical, and geotechnical characteristics. The materials were collected from the disposal area and laboratory investigations were carried out to study its feasibility for use in the construction of embankment and sub grade layers of road pavement. This paper presents the results of physical, chemical and geotechnical characteristics of copper slag and Jarofix. It was concluded that copper slag and Jarofix may be utilized in the construction of road. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=copper%20slag" title="copper slag">copper slag</a>, <a href="https://publications.waset.org/abstracts/search?q=Jarofix%20waste" title=" Jarofix waste"> Jarofix waste</a>, <a href="https://publications.waset.org/abstracts/search?q=material" title=" material"> material</a>, <a href="https://publications.waset.org/abstracts/search?q=road%20construction" title=" road construction"> road construction</a> </p> <a href="https://publications.waset.org/abstracts/2009/characterization-of-copper-slag-and-jarofix-waste-materials-for-road-construction" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/2009.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">449</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">934</span> Potential Biosorption of Rhodococcus erythropolis, an Isolated Strain from Sossego Copper Mine, Brazil </h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Marcela%20dos%20P.%20G.%20Baltazar">Marcela dos P. G. Baltazar</a>, <a href="https://publications.waset.org/abstracts/search?q=Louise%20H.%20Gracioso"> Louise H. Gracioso</a>, <a href="https://publications.waset.org/abstracts/search?q=Luciana%20J.%20Gimenes"> Luciana J. Gimenes</a>, <a href="https://publications.waset.org/abstracts/search?q=Bruno%20Karolski"> Bruno Karolski</a>, <a href="https://publications.waset.org/abstracts/search?q=Ingrid%20Avanzi"> Ingrid Avanzi</a>, <a href="https://publications.waset.org/abstracts/search?q=Elen%20A.%20Perpetuo"> Elen A. Perpetuo</a> </p> <p class="card-text"><strong>Abstract:</strong></p> In this work, bacterial strains were isolated from environmental samples from a copper mine and three of them presented potential for bioremediation of copper. All the strains were identified by mass spectrometry (MALDI-TOF-Biotyper) and grown in three diferent media supplemented with 100 ppm of copper chloride in flasks of 500mL and it was incubated at 28 °C and 180 rpm. Periodically, samples were taken and monitored for cellular growth and copper biosorption by spectrophotometer UV-Vis (600 nm) and Inductively Coupled Plasma Optical Emission Spectrometry (ICP-OES), respectively. At the end of exponential phase of cellular growth, the biomass was utilized to construct a correlation curve between absorbance and dry mass of the cells. Among the three isolates with potential for biorremediation, 1 strain exhibit capacity the most for bioremediation of effluents contaminated by copper being identified as Rhodococcus erythropolis. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=bioprocess" title="bioprocess">bioprocess</a>, <a href="https://publications.waset.org/abstracts/search?q=bioremediation" title=" bioremediation"> bioremediation</a>, <a href="https://publications.waset.org/abstracts/search?q=biosorption" title=" biosorption"> biosorption</a>, <a href="https://publications.waset.org/abstracts/search?q=copper" title=" copper"> copper</a> </p> <a href="https://publications.waset.org/abstracts/30539/potential-biosorption-of-rhodococcus-erythropolis-an-isolated-strain-from-sossego-copper-mine-brazil" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/30539.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">388</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">933</span> Leaching of Copper from Copper Ore Using Sulphuric Acid in the Presence of Hydrogen Peroxide as an Oxidizing Agent: An Optimized Process</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Hilary%20Rutto">Hilary Rutto</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Leaching with acids are the most commonly reagents used to remove copper ions from its copper ores. It is important that the process conditions are optimized to improve the leaching efficiency. In the present study the effects of pH, oxidizing agent (hydrogen peroxide), stirring speed, solid to liquid ratio and acid concentration on the leaching of copper ions from it ore were investigated using a pH Stat apparatus. Copper ions were analyzed at the end of each experiment using Atomic Absorption (AAS) machine. Results showed that leaching efficiency improved with an increase in acid concentration, stirring speed, oxidizing agent, pH and decreased with an increase in the solid to liquid ratio. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=leaching" title="leaching">leaching</a>, <a href="https://publications.waset.org/abstracts/search?q=copper" title=" copper"> copper</a>, <a href="https://publications.waset.org/abstracts/search?q=oxidizing%20agent" title=" oxidizing agent"> oxidizing agent</a>, <a href="https://publications.waset.org/abstracts/search?q=pH%20stat%20apparatus" title=" pH stat apparatus"> pH stat apparatus</a> </p> <a href="https://publications.waset.org/abstracts/22113/leaching-of-copper-from-copper-ore-using-sulphuric-acid-in-the-presence-of-hydrogen-peroxide-as-an-oxidizing-agent-an-optimized-process" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/22113.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">378</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">932</span> Green Synthesis of Copper Oxide and Cobalt Oxide Nanoparticles Using Spinacia Oleracea Leaf Extract</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Yameen%20Ahmed">Yameen Ahmed</a>, <a href="https://publications.waset.org/abstracts/search?q=Jamshid%20Hussain"> Jamshid Hussain</a>, <a href="https://publications.waset.org/abstracts/search?q=Farman%20Ullah"> Farman Ullah</a>, <a href="https://publications.waset.org/abstracts/search?q=Sohaib%20Asif"> Sohaib Asif</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The investigation aims at the synthesis of copper oxide and cobalt oxide nanoparticles using Spinacia oleracea leaf extract. These nanoparticles have many properties and applications. They possess antimicrobial catalytic properties and also they can be used in energy storage materials, gas sensors, etc. The Spinacia oleracea leaf extract behaves as a reducing agent in nanoparticle synthesis. The plant extract was first prepared and then treated with copper and cobalt salt solutions to get the precipitate. The salt solutions used for this purpose are copper sulfate pentahydrate (CuSO₄.5H₂O) and cobalt chloride hexahydrate (CoCl₂.6H₂O). The UV-Vis, XRD, EDX, and SEM techniques are used to find the optical, structural, and morphological properties of copper oxide and cobalt oxide nanoparticles. The UV absorption peaks are at 326 nm and 506 nm for copper oxide and cobalt oxide nanoparticles. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=cobalt%20oxide" title="cobalt oxide">cobalt oxide</a>, <a href="https://publications.waset.org/abstracts/search?q=copper%20oxide" title=" copper oxide"> copper oxide</a>, <a href="https://publications.waset.org/abstracts/search?q=green%20synthesis" title=" green synthesis"> green synthesis</a>, <a href="https://publications.waset.org/abstracts/search?q=nanoparticles" title=" nanoparticles"> nanoparticles</a> </p> <a href="https://publications.waset.org/abstracts/142865/green-synthesis-of-copper-oxide-and-cobalt-oxide-nanoparticles-using-spinacia-oleracea-leaf-extract" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/142865.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">213</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">931</span> Conductivity and Selection of Copper Clad Steel Wires for Grounding Applications</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=George%20Eduful">George Eduful</a>, <a href="https://publications.waset.org/abstracts/search?q=Kingsford%20J.%20A.%20Atanga"> Kingsford J. A. Atanga</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Copper clad steel wire (CCS) is primarily used for grounding applications to reduce the high incidence of copper ground conductor theft in electrical installations. The cross sectional area of the CCS is selected by relating the diameter equivalence to a copper conductor. The main difficulty is how to use a simple analytical relation to determine the right conductivity of CCS for a particular application. The use of Eddy-Current instrument for measuring conductivity is known but in most cases, the instrument is not readily available. The paper presents a simplified approach on how to size and determine CCS conductivity for a given application. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=copper%20clad%20steel%20wire" title="copper clad steel wire">copper clad steel wire</a>, <a href="https://publications.waset.org/abstracts/search?q=conductivity" title=" conductivity"> conductivity</a>, <a href="https://publications.waset.org/abstracts/search?q=grounding" title=" grounding"> grounding</a>, <a href="https://publications.waset.org/abstracts/search?q=skin%20effect" title=" skin effect"> skin effect</a> </p> <a href="https://publications.waset.org/abstracts/70671/conductivity-and-selection-of-copper-clad-steel-wires-for-grounding-applications" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/70671.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">285</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">930</span> In Situ Laser-Induced Synthesis of Copper Microstructures with High Catalytic Properties and Sensory Characteristics</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Maxim%20Panov">Maxim Panov</a>, <a href="https://publications.waset.org/abstracts/search?q=Evgenia%20Khairullina"> Evgenia Khairullina</a>, <a href="https://publications.waset.org/abstracts/search?q=Sergey%20Ermakov"> Sergey Ermakov</a>, <a href="https://publications.waset.org/abstracts/search?q=Oleg%20Gundobin"> Oleg Gundobin</a>, <a href="https://publications.waset.org/abstracts/search?q=Vladimir%20Kochemirovsky"> Vladimir Kochemirovsky</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The continuous in situ laser-induced catalysis proceeding via generation and growth of nano-sized copper particles was discussed. Also, the simple and lost-cost method for manufacturing of microstructural copper electrodes was proposed. The electrochemical properties of these electrodes were studied by cyclic voltammetry and impedance spectroscopy. The surface of the deposited copper structures (electrodes) was investigated by X-ray photoelectron spectroscopy and atomic force microscopy. These microstructures are highly conductive and porous with a dispersion of pore size ranging from 50 nm to 50 μm. An analytical response of the fabricated copper electrode is 30 times higher than those observed for a pure bulk copper with similar geometric parameters. A study of sensory characteristics for hydrogen peroxide determination showed that the value of Faraday current at the fabricated copper electrode is 2-2.5 orders of magnitude higher than for etalon one. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=laser-induced%20deposition" title="laser-induced deposition">laser-induced deposition</a>, <a href="https://publications.waset.org/abstracts/search?q=electrochemical%20electrodes" title=" electrochemical electrodes"> electrochemical electrodes</a>, <a href="https://publications.waset.org/abstracts/search?q=non-enzymatic%20sensors" title=" non-enzymatic sensors"> non-enzymatic sensors</a>, <a href="https://publications.waset.org/abstracts/search?q=copper" title=" copper"> copper</a> </p> <a href="https://publications.waset.org/abstracts/59323/in-situ-laser-induced-synthesis-of-copper-microstructures-with-high-catalytic-properties-and-sensory-characteristics" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/59323.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">246</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">929</span> Investigation of Parameters Affecting Copper Recovery from Brass Melting Dross</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Sercan%20Basit">Sercan Basit</a>, <a href="https://publications.waset.org/abstracts/search?q=Muhlis%20N.%20Sar%C4%B1dede"> Muhlis N. Sarıdede</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Metal amounts of copper based compounds in the various wastes have been recovered successfully by hydrometallurgical treatment methods in the literature. X-ray diffraction pattern of the brass melting slag demonstrates that it contains sufficient amount of recoverable copper. Recovery of copper from brass melting dross by sulfuric acid leaching and the effect of temperature and acid and oxidant concentration on recovery rate of copper have been investigated in this study. Experiments were performed in a temperature-controlled reactor in sulfuric acid solution in different molarities using solid liquid ratio of 100 g/L, with leaching time of 300 min. Temperature was changed between 25 °C and 80 °C and molarity was between 0.5 and 3M. The results obtained showed that temperature has important positive effect on recovery whereas it decreases with time. Also copper was recovered in larger amounts from brass dross in the presence of H2O2 as an oxidant according to the case that oxidant was not used. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=brass%20dross" title="brass dross">brass dross</a>, <a href="https://publications.waset.org/abstracts/search?q=copper%20recovery" title=" copper recovery"> copper recovery</a>, <a href="https://publications.waset.org/abstracts/search?q=hydrogen%20peroxide" title=" hydrogen peroxide"> hydrogen peroxide</a>, <a href="https://publications.waset.org/abstracts/search?q=leaching" title=" leaching"> leaching</a> </p> <a href="https://publications.waset.org/abstracts/28414/investigation-of-parameters-affecting-copper-recovery-from-brass-melting-dross" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/28414.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">334</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">928</span> Influence of Nano Copper Slag in Strength Behavior of Lime Stabilized Soil</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=V.%20K.%20Stalin">V. K. Stalin</a>, <a href="https://publications.waset.org/abstracts/search?q=M.%20Kirithika"> M. Kirithika</a>, <a href="https://publications.waset.org/abstracts/search?q=K.%20Shanmugam"> K. Shanmugam</a>, <a href="https://publications.waset.org/abstracts/search?q=K.%20Tharini"> K. Tharini</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Nanotechnology has been widely used in many applications such as medical, electronics, robotics and also in geotechnical engineering area through stabilization of bore holes, grouting etc. In this paper, an attempt is made for understanding the influence of nano copper slag (1%, 2% & 3%) on the index, compaction and UCC strength properties of natural soil (CH type) with and without lime stabilization for immediate and 7 days curing period. Results indicated that upto 1% of Nano copper slag, there is an increment in UC strength of virgin soil and lime stabilised soil. Beyond 1% nano copper slag, there is a steep reduction in UC strength and increase of plasticity both in lime stabilised soil and virgin soil. The effect of lime is found to show more influence on large surface area of nano copper slag in natural soil. For both immediate and curing effect, with 1% of Nano copper slag, the maximum unconfined compressive strength was 38% and 106% higher than that of the virgin soil strength. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=lime" title="lime">lime</a>, <a href="https://publications.waset.org/abstracts/search?q=nano%20copper%20slag" title=" nano copper slag"> nano copper slag</a>, <a href="https://publications.waset.org/abstracts/search?q=SEM" title=" SEM"> SEM</a>, <a href="https://publications.waset.org/abstracts/search?q=XRD" title=" XRD"> XRD</a>, <a href="https://publications.waset.org/abstracts/search?q=stabilisation" title=" stabilisation"> stabilisation</a> </p> <a href="https://publications.waset.org/abstracts/56496/influence-of-nano-copper-slag-in-strength-behavior-of-lime-stabilized-soil" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/56496.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">434</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">927</span> The Effect of the Flow Pipe Diameter on the Rheological Behavior of a Polymeric Solution (CMC)</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=H.%20Abchiche">H. Abchiche</a>, <a href="https://publications.waset.org/abstracts/search?q=M.%20Mellal"> M. Mellal</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The aim of this work is to study the parameters that influence the rheological behavior of a complex fluid (sodium Carboxyméthylcellulose solution), on a capillary rheometer. An installation has been made to be able to vary the diameter of trial conducts. The obtained results allowed us to deduce that: the diameter of trial conducts have a remarkable effect on the rheological responds. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=bingham%E2%80%99s%20fluid" title="bingham’s fluid">bingham’s fluid</a>, <a href="https://publications.waset.org/abstracts/search?q=CMC" title=" CMC"> CMC</a>, <a href="https://publications.waset.org/abstracts/search?q=cylindrical%20conduit" title=" cylindrical conduit"> cylindrical conduit</a>, <a href="https://publications.waset.org/abstracts/search?q=rheological%20behavior" title=" rheological behavior"> rheological behavior</a> </p> <a href="https://publications.waset.org/abstracts/22683/the-effect-of-the-flow-pipe-diameter-on-the-rheological-behavior-of-a-polymeric-solution-cmc" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/22683.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">332</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">926</span> Laser-TIG Welding-Brazing for Dissimilar Metals between Aluminum Alloy and Steel</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Xiangfang%20Xu">Xiangfang Xu</a>, <a href="https://publications.waset.org/abstracts/search?q=Bintao%20Wu"> Bintao Wu</a>, <a href="https://publications.waset.org/abstracts/search?q=Yugang%20Miao"> Yugang Miao</a>, <a href="https://publications.waset.org/abstracts/search?q=Duanfeng%20Han"> Duanfeng Han</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Experiments were conducted on 5A06 aluminum alloy and Q235 steel using the laser-TIG hybrid heat source welding-brazing method to realize the reliable connection of Al/Fe dissimilar metals and the welding characteristics were analyzed. It was found that the joints with uniform seam and high tensile strength could be obtained using such a method, while the welding process demanded special welding parameters. Spectrum measurements showed that the Al and Fe atoms diffused more thoroughly at the brazing interface and formed a 3μm-thick intermetallic compound layer at the Al/Fe joints brazed connection interface. Shearing tests indicated that the shearing strength of the Al/Fe welding-brazed joint was 165MPa. The fracture occurred near the melting zone of aluminum alloy, which belonged to the mixed mode with the ductile fracture as the base and the brittle fracture as the supplement. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=Al%2FFe%20dissimilar%20metals" title="Al/Fe dissimilar metals">Al/Fe dissimilar metals</a>, <a href="https://publications.waset.org/abstracts/search?q=laser-TIG%20hybrid%20heat%20source" title=" laser-TIG hybrid heat source"> laser-TIG hybrid heat source</a>, <a href="https://publications.waset.org/abstracts/search?q=shearing%20strength" title=" shearing strength"> shearing strength</a>, <a href="https://publications.waset.org/abstracts/search?q=welding-brazing%20method" title=" welding-brazing method"> welding-brazing method</a> </p> <a href="https://publications.waset.org/abstracts/17285/laser-tig-welding-brazing-for-dissimilar-metals-between-aluminum-alloy-and-steel" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/17285.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">406</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">925</span> Antimicrobial Properties of Copper in Gram-Negative and Gram-Positive Bacteria</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Travis%20J.%20Meyer">Travis J. Meyer</a>, <a href="https://publications.waset.org/abstracts/search?q=Jasodra%20Ramlall"> Jasodra Ramlall</a>, <a href="https://publications.waset.org/abstracts/search?q=Phyo%20Thu"> Phyo Thu</a>, <a href="https://publications.waset.org/abstracts/search?q=Nidhi%20Gadura"> Nidhi Gadura</a> </p> <p class="card-text"><strong>Abstract:</strong></p> For centuries humans have used the antimicrobial properties of copper to their advantage. Yet, after all these years the underlying mechanisms of copper mediated cell death in various microbes remain unclear. We had explored the hypothesis that copper mediated increased levels of lipid peroxidation in the membrane fatty acids is responsible for increased killing inEscherichia coli. In this study we show that in both gram positive (Staphylococcus aureus) and gram negative (Pseudomonas aeruginosa) bacteria there is a strong correlation between copper mediated cell death and increased levels of lipid peroxidation. Interestingly, the non-spore forming gram positive bacteria as well as gram negative bacteria show similar patterns of cell death, increased levels of lipid peroxidation, as well as genomic DNA degradation, however there is some difference inloss in membrane integrity upon exposure to copper alloy surface. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=antimicrobial" title="antimicrobial">antimicrobial</a>, <a href="https://publications.waset.org/abstracts/search?q=copper" title=" copper"> copper</a>, <a href="https://publications.waset.org/abstracts/search?q=gram%20positive" title=" gram positive"> gram positive</a>, <a href="https://publications.waset.org/abstracts/search?q=gram%20negative" title=" gram negative"> gram negative</a> </p> <a href="https://publications.waset.org/abstracts/21902/antimicrobial-properties-of-copper-in-gram-negative-and-gram-positive-bacteria" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/21902.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">483</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">924</span> Depression of Copper-Activated Pyrite by Potassium Ferrate in Copper Ore Flotation Using High Salinity Process Water</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Yufan%20Mu">Yufan Mu</a> </p> <p class="card-text"><strong>Abstract:</strong></p> High salinity process water (HSPW) is often applied in copper ore flotation to alleviate freshwater shortage; however, it is detrimental to copper flotation as it strongly enhances copper activation of pyrite. In this study, the depression effect of a strong oxidiser, potassium ferrate (𝐾₂𝐹₄), on the flotation of copper-activated pyrite was tested to realise the selective separation of pyrite from copper minerals (e.g., chalcopyrite) in flotation using HSPW. The flotation results show that when (𝐾₂𝐹₄) was added in the flotation cell during conditioning, (𝐾₂𝐹₄) could selectively depress copper-activated pyrite while improving chalcopyrite flotation. The depression mechanism of (𝐾₂𝐹₄) on pyrite was ascribed to the significant increase in the pulp potential (Eₕ), dissolved oxygen (DO) concentration and the amount of ferric oxyhydroxides as a result of ferrate decomposition. In the flotation cell, the high Eh and DO concentration promoted the oxidation of low valency metal species (𝐶⁺𝐹e²⁺) released from mineral surfaces and forged steel grinding media, and the resultant high valency metal oxyhydroxides 𝐶u(𝑂H)₂⁄Fe(OH)₃ together with the ferric oxyhydroxides from ferrate decomposition preferentially precipitated on pyrite surface due to its more cathodic nature compared with chalcopyrite, which increased pyrite surface hydrophilicity and reduced its floatability. This study reveals that (𝐾₂𝐹₄) is a highly efficient depressant for pyrite when separating copper minerals from pyrite in flotation using HSPW if dosed properly. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=copper%20flotation" title="copper flotation">copper flotation</a>, <a href="https://publications.waset.org/abstracts/search?q=pyrite%20depression" title=" pyrite depression"> pyrite depression</a>, <a href="https://publications.waset.org/abstracts/search?q=copper-activated%20pyrite" title=" copper-activated pyrite"> copper-activated pyrite</a>, <a href="https://publications.waset.org/abstracts/search?q=potassium%20ferrate" title=" potassium ferrate"> potassium ferrate</a>, <a href="https://publications.waset.org/abstracts/search?q=high%20salinity%20process%20water" title=" high salinity process water"> high salinity process water</a> </p> <a href="https://publications.waset.org/abstracts/165931/depression-of-copper-activated-pyrite-by-potassium-ferrate-in-copper-ore-flotation-using-high-salinity-process-water" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/165931.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">74</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">923</span> Synthesizing CuFe2O4 Spinel Powders by a Combustion-Like Process for Solid Oxide Fuel Cell Interconnects Coating</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Seyedeh%20Narjes%20Hosseini">Seyedeh Narjes Hosseini</a>, <a href="https://publications.waset.org/abstracts/search?q=Mohammad%20Hossein%20Enayati"> Mohammad Hossein Enayati</a>, <a href="https://publications.waset.org/abstracts/search?q=Fathallah%20Karimzadeh"> Fathallah Karimzadeh</a>, <a href="https://publications.waset.org/abstracts/search?q=Nigel%20Mark%20Sammes"> Nigel Mark Sammes</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The synthesis of CuFe2O4 spinel powders by an optimized combustion-like process followed by calcinations is described herein. The samples were characterized by X-ray diffraction (XRD), differential thermal analysis (TG/DTA), scanning electron microscopy (SEM), dilatometry and 4-probe DC methods. Different glycine to nitrate (G/N) ratios of 1 (fuel-deficient), 1.48 (stoichiometric) and 2 (fuel-rich) were employed. Calcining the as-prepared powders at 800 and 1000°C for 5 hours showed that the 2 ratio results in the formation of desired copper spinel single phase at both calcinations temperatures. For G/N=1, formation of CuFe2O4 takes place in three steps. First, iron and copper nitrates decomposes to iron oxide and pure copper. Then, copper transforms to copper oxide and finally, copper and iron oxides react to each other to form copper ferrite spinel phase. The electrical conductivity and the coefficient of thermal expansion of the sintered pelletized samples were obtained 2 S.cm-1 (800°C) and 11×10-6 °C-1 (25-800°C), respectively. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=SOFC%20interconnect%20coatings" title="SOFC interconnect coatings">SOFC interconnect coatings</a>, <a href="https://publications.waset.org/abstracts/search?q=Copper%20ferrite" title=" Copper ferrite"> Copper ferrite</a>, <a href="https://publications.waset.org/abstracts/search?q=Spinels" title=" Spinels"> Spinels</a>, <a href="https://publications.waset.org/abstracts/search?q=electrical%20conductivity" title=" electrical conductivity"> electrical conductivity</a>, <a href="https://publications.waset.org/abstracts/search?q=Glycine%E2%80%93nitrate%20process" title=" Glycine–nitrate process"> Glycine–nitrate process</a> </p> <a href="https://publications.waset.org/abstracts/31568/synthesizing-cufe2o4-spinel-powders-by-a-combustion-like-process-for-solid-oxide-fuel-cell-interconnects-coating" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/31568.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">481</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">922</span> The Investigation of Precipitation Conditions of Chevreul’s Salt</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Turan%20%C3%87alban">Turan Çalban</a>, <a href="https://publications.waset.org/abstracts/search?q=Fatih%20Sevim"> Fatih Sevim</a>, <a href="https://publications.waset.org/abstracts/search?q=Oral%20La%C3%A7in"> Oral Laçin</a> </p> <p class="card-text"><strong>Abstract:</strong></p> In this study, the precipitation conditions of Chevreul’s salt were evaluated. The structure of Chevreul’s salt was examined by considering the previous studies. Thermodynamically, the most important precipitation parameters were pH, temperature, and sulphite-copper(II) ratio. The amount of Chevreul’s salt increased with increasing the temperature and sulphite-copper(II) ratio at the certain range, while it increased with decreasing the pH value at the chosen range. The best solution medium for recovery of Chevreul’s salt is sulphur dioxide gas-water system. Moreover, the soluble sulphite salts are used as efficient precipitating reagents. Chevreul’s salt is generally used to produce the highly pure copper powders from synthetic copper sulphate solutions and impure leach solutions. When the pH of the initial ammoniacal solution is greater than 8.5, ammonia in the medium is not free, and Chevreul’s salt from solution does not precipitate. In contrast, copper ammonium sulphide is precipitated. The pH of the initial solution containing ammonia for precipitating of Chevreul’s salt must be less than 8.5. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=Chevreul%27s%20salt" title="Chevreul's salt">Chevreul's salt</a>, <a href="https://publications.waset.org/abstracts/search?q=production" title=" production"> production</a>, <a href="https://publications.waset.org/abstracts/search?q=copper%20sulfites" title=" copper sulfites"> copper sulfites</a>, <a href="https://publications.waset.org/abstracts/search?q=copper%20compound" title=" copper compound"> copper compound</a> </p> <a href="https://publications.waset.org/abstracts/52071/the-investigation-of-precipitation-conditions-of-chevreuls-salt" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/52071.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads 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