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style="padding-right:1em">日期：2024-10-10</span> <span id="hits">阅读：748</span> </div> <div class="introduce">核心提示：从稻杆、稻壳中提取制作一种半导体材料——纳米碳化硅，纯度达99.99%，颗粒尺寸可细达30nm，使稻壳附加值提升9倍以上。</div><div id="content"><div class="content" id="article"><p> <span style="text-indent: 2em;">据武汉科技大学消息，日前，该校材料学部“志同‘稻’合”学生团队采用低温镁热技术，从稻杆、稻壳中提取制作一种半导体材料——纳米碳化硅，纯度达99.99%，颗粒尺寸可细达30nm，使稻壳附加值提升9倍以上。</span></p> <p>学生团队负责人韦奕麒从2021年起研究碳化硅，带领团队成员赴各地农村调研，看到农业副产物堆积十分严重，综合利用率不足40%。经过对30余种农业副产物检测后发现，水稻中氧化硅含量高，且粒度均匀，呈纳米形态。</p> <p>如何低温便捷地从稻杆、稻壳等农业副产物中大规模合成纳米碳化硅，并控制其尺寸形态是技术难点。国内外工业常用碳热还原法制备，温度达1600～2200℃，能耗大，纯度低，转化工艺复杂。</p> <p>该团队通过实验和热力学计算，经过数百次尝试，优化工艺参数，将稻杆、稻壳中的天然纳米氧化硅与碳反应，转化为颗粒均匀的纳米碳化硅产品。反应过程中，团队自研低温镁热技术和动态热量控制技术，突破了镁热过程因局部高温引起的纳米碳化硅烧结问题，保障颗粒尺寸细小均匀。</p> <p>韦奕麒介绍，团队曾在乡村开展试点工作，面向农户以高于市场100%的价格收购稻壳，并采用低温工艺生产高纯度纳米碳化硅产品，近三年可为企业新增营业额1000万元以上。当前项目已完成中试阶段，正在和企业开展战略合作进行产品试用，团队计划在各村镇建立农业副产物原料加工基地，助农增收。</p> <p>纳米碳化硅可用于芯片制造、高端陶瓷等，全球碳化硅产量供不应求。韦奕麒表示：“我们还将迭代技术，计划开发完善的纳米碳化硅转化技术，把其他农业副产物利用起来，助力发展绿色农业，做乡村振兴的实践者！”</p></div> </div> <div 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