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</script> </div> </div>  <span class="guanzhu gz-btn"><a href="javascript:void(0);" target="_parent" onclick="OpFollowMTSPUser()"></a></span> <span class="sc-btn shoucang"><a onclick="OpCollect()" target="_parent"></a></span> </div> <input type='hidden' id="CurrUserID" value="85491"> <input type='hidden' id="CurrCompanyID" value="74305"> <input type='hidden' id="CurrMTSPUserID" value=""> <input type='hidden' id="OpCollect_Title" value="介电常数测试仪的定义"> <input type='hidden' id="OpCollect_OpareteType" value="1"> <input type='hidden' id="OpCollect_ObjectID" value="220972"> <input type='hidden' id="OpCollect_ObjectType" value="13"> <input type='hidden' id="OpCollect_PictureUrl" value=""> <script type="text/javascript" src="/js/Common.js" ></script> <script type="text/javascript" >IsExitMTSPFollow()</script> </div> <div id="newsContent" class="newsContent"><p><span style="font-size:16px"><span style="color:#333333"><span style="font-family:宋体"><strong>介电常数测试仪</strong>的定义</span></span><br /><span style="color:#333333"><span style="font-family:宋体">介电常数描述的是材料与电场之间的相互作用。介电常数</span></span><span style="color:#333333"><span style="font-family:calibri,sans-serif"> (K*)</span></span><span style="color:#333333"><span style="font-family:宋体">等于复数相对介电常数</span></span><span style="color:#333333"><span style="font-family:calibri,sans-serif">(</span></span><span style="color:#333333"><span style="font-family:宋体">ε</span></span><span style="color:#333333"><span style="font-family:calibri,sans-serif">*r)</span></span><span style="color:#333333"><span style="font-family:宋体">，或复数介电常数</span></span><span style="color:#333333"><span style="font-family:calibri,sans-serif">(</span></span><span style="color:#333333"><span style="font-family:宋体">ε</span></span><span style="color:#333333"><span style="font-family:calibri,sans-serif">*)</span></span><span style="color:#333333"><span style="font-family:宋体">与真空介电常数</span></span><span style="color:#333333"><span style="font-family:calibri,sans-serif">(</span></span><span style="color:#333333"><span style="font-family:宋体">ε</span></span><span style="color:#333333"><span style="font-family:calibri,sans-serif">0)</span></span><span style="color:#333333"><span style="font-family:宋体">的比值。复数相对介电常数的实部</span></span><span style="color:#333333"><span style="font-family:calibri,sans-serif">(</span></span><span style="color:#333333"><span style="font-family:宋体">ε</span></span><span style="color:#333333"><span style="font-family:calibri,sans-serif">'r) </span></span><span style="color:#333333"><span style="font-family:宋体">表示外部电场有多少电能储存到材料中；对于绝大多数固体和液体来说，ε</span></span><span style="color:#333333"><span style="font-family:calibri,sans-serif">'r>1</span></span><span style="color:#333333"><span style="font-family:宋体">。复数相对介电常数的虚部</span></span><span style="color:#333333"><span style="font-family:calibri,sans-serif">(</span></span><span style="color:#333333"><span style="font-family:宋体">ε</span></span><span style="color:#333333"><span style="font-family:calibri,sans-serif">"r) </span></span><span style="color:#333333"><span style="font-family:宋体">称为损耗系数，表示材料中储存的电能有多少消耗或损失到外电场中。ε</span></span><span style="color:#333333"><span style="font-family:calibri,sans-serif">"r</span></span><span style="color:#333333"><span style="font-family:宋体">始终</span></span><span style="color:#333333"><span style="font-family:calibri,sans-serif">>0</span></span><span style="color:#333333"><span style="font-family:宋体">，且通常远远小于ε</span></span><span style="color:#333333"><span style="font-family:calibri,sans-serif">'r</span></span><span style="color:#333333"><span style="font-family:宋体">。损耗系数同时包括介电材料损耗和电导率的效应。</span></span><br /><span style="color:#333333"><span style="font-family:宋体">如果用简单的矢量图表示复数介电常数，那么实部和虚部的相位将会相差</span></span><span style="color:#333333"><span style="font-family:calibri,sans-serif">90</span></span><span style="color:#333333"><span style="font-family:宋体">°。其矢量和与实轴</span></span><span style="color:#333333"><span style="font-family:calibri,sans-serif">(</span></span><span style="color:#333333"><span style="font-family:宋体">ε</span></span><span style="color:#333333"><span style="font-family:calibri,sans-serif">'r)</span></span><span style="color:#333333"><span style="font-family:宋体">形成夹角δ。通常使用这个角度的正切值</span></span><span style="color:#333333"><span style="font-family:calibri,sans-serif">tan</span></span><span style="color:#333333"><span style="font-family:宋体">δ或损耗角正切来表示材料的相对“损耗”。</span></span><br /><br /><img alt="" src="https://img49.gkzhan.com/9/20181207/636797739407652956830.png" style="height:254px; width:380px" /></span></p><p><span style="font-size:16px"><span style="color:#333333"><span style="font-family:宋体">使用平行板法测量介电常数</span></span><br /><span style="color:#333333"><span style="font-family:宋体">当使用阻抗测量仪器测量介电常数时，通常采用平行板法</span></span></span></p><p><span style="font-size:16px"><span style="color:#333333"><span style="font-family:宋体"><img alt="" src="https://img48.gkzhan.com/9/20181207/636797740058202956807.png" style="height:238px; width:427px" /></span></span></span></p><p> </p><p><span style="font-size:16px"><span style="color:#333333"><span style="font-family:宋体">平行板法在</span><span style="font-family:calibri,sans-serif">ASTM D150</span></span><span style="color:#333333"><span style="font-family:宋体">标准中又称为三端子法，其原理是通过在两个电极之间插入一个材料或液体薄片组成一个电容器，然后测量其电容，根据测量结果计算介电常数。在实际测试装置中，两个电极配备在夹持介电材料的测试夹具上。阻抗测量仪器将测量电容</span></span><span style="color:#333333"><span style="font-family:calibri,sans-serif">(C)</span></span><span style="color:#333333"><span style="font-family:宋体">和耗散</span></span><span style="color:#333333"><span style="font-family:calibri,sans-serif">(D)</span></span><span style="color:#333333"><span style="font-family:宋体">的矢量分量，然后由软件程序计算出介电常数和损耗角正切。</span></span><br /><span style="color:#333333"><span style="font-family:宋体">当简单地测量两个电极之间的介电材料时，在电极边缘会产生杂散电容或边缘电容，从而使得测得的介电材料电容值比实际值大。边缘电容会导致电流流经介电材料和边缘电容器，从而产生测量误差。</span></span><br /><span style="color:#333333"><span style="font-family:宋体">使用保护电极，可以消除边缘电容所导致的测量误差。保护电极会吸收边缘的电场，所以在电极之间测得的电容只是由流经介电材料的电流形成，这样便可以获得准确的测量结果。当结合使用主电极和保护电极时，主电极称为被保护电极。</span></span></span></p><p> </p><p> </p><p><span style="font-size:16px"><span style="color:#333333"><span style="font-family:宋体"><img alt="" src="https://img49.gkzhan.com/9/20181207/636797740711102956289.png" style="height:170px; width:371px" /></span></span></span></p><p> </p><p><span style="font-size:16px"><span style="color:#333333"><span style="font-family:宋体">接触电极法</span></span><br /><span style="color:#333333"><span style="font-family:宋体">这种方法通过测量与被测材料（</span></span><span style="color:#333333"><span style="font-family:calibri,sans-serif">MUT</span><span style="font-family:宋体">）直接接触的电极的电容来推导出介电常数。</span></span></span></p><p><span style="font-size:16px"><span style="color:#333333"><span style="font-family:宋体"><img alt="" src="https://img49.gkzhan.com/9/20181207/636797741234190956108.png" style="height:241px; width:350px" /></span></span></span></p><p> </p><p> </p><p><span style="font-size:16px"><span style="color:#333333"><span style="font-family:宋体">介电常数和损耗角正切通过以下公式</span></span> <span style="color:#333333"><span style="font-family:宋体">计算</span></span></span></p><p><span style="font-size:16px"><span style="color:#333333"><span style="font-family:宋体"><img alt="" src="https://img48.gkzhan.com/9/20181207/636797741927962956182.png" style="height:124px; width:460px" /></span></span></span></p><p> </p><p> </p><p> </p><p><span style="font-size:16px"><span style="color:#333333"><span style="font-family:宋体">其中</span><span style="font-family:calibri,sans-serif">Cp: MUT</span></span><span style="color:#333333"><span style="font-family:宋体">的等效平行电容</span></span><span style="color:#333333"><span style="font-family:calibri,sans-serif"> [F]</span></span><br /><span style="color:#333333"><span style="font-family:calibri,sans-serif">D: </span></span><span style="color:#333333"><span style="font-family:宋体">耗散系数</span></span><span style="color:#333333"><span style="font-family:calibri,sans-serif"> (</span></span><span style="color:#333333"><span style="font-family:宋体">测量值</span></span><span style="color:#333333"><span style="font-family:calibri,sans-serif">)</span></span><br /><span style="color:#333333"><span style="font-family:calibri,sans-serif">tm: MUT </span></span><span style="color:#333333"><span style="font-family:宋体">的平均厚度</span></span><span style="color:#333333"><span style="font-family:calibri,sans-serif"> [m]</span></span><br /><span style="color:#333333"><span style="font-family:calibri,sans-serif">A: </span></span><span style="color:#333333"><span style="font-family:宋体">被保护电极的表面积</span></span><span style="color:#333333"><span style="font-family:calibri,sans-serif"> [m2]</span></span><br /><span style="color:#333333"><span style="font-family:calibri,sans-serif">d: </span></span><span style="color:#333333"><span style="font-family:宋体">被保护电极的直径</span></span><span style="color:#333333"><span style="font-family:calibri,sans-serif"> [m]</span></span><br /><span style="color:#333333"><span style="font-family:宋体">ε</span></span><span style="color:#333333"><span style="font-family:calibri,sans-serif">0: </span></span><span style="color:#333333"><span style="font-family:宋体">自由空间的介电常数</span></span><span style="color:#333333"><span style="font-family:calibri,sans-serif"> =8.854 x 10-12 [F/m]</span></span><br /><span style="color:#333333"><span style="font-family:宋体">接触电极法不需要制备任何材料，而且测量操作非常简单，因此得到</span></span><span style="color:#333333"><span style="font-family:calibri,sans-serif">zui</span></span><span style="color:#333333"><span style="font-family:宋体">广泛的使用。不过在用这种方法进行测量时，如果没有考虑到空气间隙及其影响，那么可能会产生严重的测量误差。</span></span><br /><span style="color:#333333"><span style="font-family:宋体">当电极直接接触</span></span><span style="color:#333333"><span style="font-family:calibri,sans-serif"> MUT </span></span><span style="color:#333333"><span style="font-family:宋体">时，</span></span><span style="color:#333333"><span style="font-family:calibri,sans-serif">MUT </span></span><span style="color:#333333"><span style="font-family:宋体">与电极之间会形成一个空气间隙。无论</span></span><span style="color:#333333"><span style="font-family:calibri,sans-serif"> MUT </span><span style="font-family:宋体">两面组成得多么平坦和平行，都不可避免会产生空气间隙。这个空气间隙会导致测量结果出现误差，因为测量的电容实际上是介电材料与空气间隙串联结构的电容。</span></span></span></p><p> </p><p><span style="font-size:16px"><span style="color:#333333"><span style="font-family:宋体"><img alt="" src="https://img49.gkzhan.com/9/20181207/636797742732494956802.png" style="height:245px; width:515px" /></span></span></span></p><p> </p><p><span style="font-size:16px"><span style="color:#333333"><span style="font-family:宋体">通过用薄膜电极接触介电材料的表面，可以减小空气间隙的影响。虽然需要进行额外的材料制备</span><span style="font-family:calibri,sans-serif"> (</span></span><span style="color:#333333"><span style="font-family:宋体">制作薄膜电极</span></span><span style="color:#333333"><span style="font-family:calibri,sans-serif">)</span></span><span style="color:#333333"><span style="font-family:宋体">，但可以实现</span></span><span style="color:#333333"><span style="font-family:calibri,sans-serif">zui</span></span><span style="color:#333333"><span style="font-family:宋体">准确的测量。</span></span><br /><span style="color:#333333"><span style="font-family:宋体">※非接触电极法</span></span><br /><span style="color:#333333"><span style="font-family:宋体">非接触电极法从概念上来说融合了接触电极法的优势，并避免了其缺点。它不需要薄膜电极，但仍可解决空气间隙效应。根据在有</span></span><span style="color:#333333"><span style="font-family:calibri,sans-serif"> MUT </span></span><span style="color:#333333"><span style="font-family:宋体">和没有</span></span><span style="color:#333333"><span style="font-family:calibri,sans-serif"> MUT </span><span style="font-family:宋体">时获得的两</span></span></span></p><p><span style="font-size:16px"><span style="color:#333333"><span style="font-family:宋体"><img alt="" src="https://img50.gkzhan.com/9/20181207/636797744209288956231.png" style="height:202px; width:425px" /></span></span></span></p><p><span style="font-size:16px"><span style="color:#333333"><span style="font-family:宋体">理论上，电极间隙</span><span style="font-family:calibri,sans-serif"> (tg)</span></span><span style="color:#333333"><span style="font-family:宋体">应比</span></span><span style="color:#333333"><span style="font-family:calibri,sans-serif"> MUT</span></span><span style="color:#333333"><span style="font-family:宋体">的厚度</span></span><span style="color:#333333"><span style="font-family:calibri,sans-serif"> (tm) </span></span><span style="color:#333333"><span style="font-family:宋体">略微小一点。换句话说，空气间隙</span></span><span style="color:#333333"><span style="font-family:calibri,sans-serif">(tg-tm) </span></span><span style="color:#333333"><span style="font-family:宋体">应远远小于</span></span><span style="color:#333333"><span style="font-family:calibri,sans-serif"> MUT </span></span><span style="color:#333333"><span style="font-family:宋体">的厚度</span></span><span style="color:#333333"><span style="font-family:calibri,sans-serif">(tm)</span></span><span style="color:#333333"><span style="font-family:宋体">。要想正确执行测量，必须满足这些要求。</span></span><span style="color:#333333"><span style="font-family:calibri,sans-serif">zui</span><span style="font-family:宋体">少要进行两次电容测量，以便使用测量结果计算介电常数。</span></span></span></p><p> </p><p><span style="font-size:16px"><span style="color:#333333"><span style="font-family:宋体"><img alt="" src="https://img47.gkzhan.com/9/20181207/636797758272544956870.png" style="height:129px; width:429px" /></span></span></span></p><p><span style="font-size:16px"><span style="color:#333333"><span style="font-family:宋体">平行板测量法的比较</span></span><br /><span style="color:#333333"><span style="font-family:宋体">方法：</span></span>     <span style="color:#333333"><span style="font-family:宋体">接触电极</span></span><span style="color:#333333">    (</span><span style="color:#333333"><span style="font-family:宋体">不使用薄膜电极</span></span><span style="color:#333333">)</span>             <span style="color:#333333"><span style="font-family:宋体">非接触电极</span></span>              <span style="color:#333333"><span style="font-family:宋体">接触电极</span></span><span style="color:#333333">  (</span><span style="color:#333333"><span style="font-family:宋体">使用薄膜电极</span></span><span style="color:#333333">)</span><br /><span style="color:#333333"><span style="font-family:宋体">精度</span></span>              <span style="color:#333333"><span style="font-family:宋体">低</span></span>                                   <span style="color:#333333"><span style="font-family:宋体">中</span></span>                         <span style="color:#333333"><span style="font-family:宋体">高</span></span><br /><span style="color:#333333"><span style="font-family:宋体">适用的</span></span><span style="color:#333333">MUT</span>    <span style="color:#333333"><span style="font-family:宋体">具有平滑表面的固体材料</span></span>      <span style="color:#333333"><span style="font-family:宋体">具有平滑表面的固体材料</span></span>        <span style="color:#333333"><span style="font-family:宋体">薄膜电极必须应用到表面</span></span><br /><span style="color:#333333"><span style="font-family:宋体">操作</span></span><span style="color:#333333">           1</span><span style="color:#333333"><span style="font-family:宋体">次测量</span></span><span style="color:#333333">                            2</span><span style="color:#333333"><span style="font-family:宋体">次测量</span></span><span style="color:#333333">                     1</span><span style="color:#333333"><span style="font-family:宋体">次测量</span></span><br /> </span></p><p> </p><p> </p><p> </p><p> </p><table align="center" border="0" cellpadding="0" style="width:739px"><tbody><tr><td colspan="4" style="height: 2px"><p style="text-align: center"><span style="color:#3f3f3f"><span style="font-family:宋体"><span style="font-size:9pt">附表一</span></span></span><span style="color:#3f3f3f"><span style="font-family:arial,sans-serif"><span style="font-size:9pt">,</span></span></span><span style="color:#3f3f3f"><span style="font-family:宋体"><span style="font-size:9pt">介质损耗测试系统主要性能参数一览表</span></span></span></p></td></tr><tr><td colspan="2" style="height: 3px"><p style="text-align: center"><span style="color:#3f3f3f"><span style="font-family:arial,sans-serif"><span style="font-size:9pt">BH916</span></span></span><span style="color:#3f3f3f"><span style="font-family:宋体"><span style="font-size:9pt">测试装置</span></span></span></p></td><td colspan="2" style="height: 3px"><p style="text-align: center"><span style="color:#3f3f3f"><span style="font-family:arial,sans-serif"><span style="font-size:9pt">GDAT</span></span></span><span style="color:#3f3f3f"><span style="font-family:宋体"><span style="font-size:9pt">高频</span></span></span><span style="color:#3f3f3f"><span style="font-family:arial,sans-serif"><span style="font-size:9pt">Q</span></span></span><span style="color:#3f3f3f"><span style="font-family:宋体"><span style="font-size:9pt">表</span></span></span></p></td></tr><tr><td style="width: 136px"><p style="text-align: left"><span style="color:#3f3f3f"><span style="font-family:宋体"><span style="font-size:9pt">平板电容极片</span></span></span></p></td><td style="width: 206px"><p style="text-align: left"><span style="color:#3f3f3f"><span style="font-family:arial,sans-serif"><span style="font-size:9pt">Φ50mm/Φ38mm</span></span></span><span style="color:#3f3f3f"><span style="font-family:宋体"><span style="font-size:9pt">可选</span></span></span></p></td><td style="width: 179px"><p style="text-align: left"><span style="color:#3f3f3f"><span style="font-family:宋体"><span style="font-size:9pt">频率范围</span></span></span></p></td><td style="width: 182px"><p style="text-align: center"><span style="color:#3f3f3f"><span style="font-family:arial,sans-serif"><span style="font-size:9pt">20KHz-60MHz/200KHz-160MHz</span></span></span></p></td></tr><tr><td><p style="text-align: left"><span style="color:#3f3f3f"><span style="font-family:宋体"><span style="font-size:9pt">间距可调范围</span></span></span></p></td><td><p style="text-align: left"><span style="color:#3f3f3f"><span style="font-family:arial,sans-serif"><span style="font-size:9pt">≥15mm</span></span></span></p></td><td><p style="text-align: left"><span style="color:#3f3f3f"><span style="font-family:宋体"><span style="font-size:9pt">频率指示误差</span></span></span></p></td><td><p style="text-align: center"><span style="color:#3f3f3f"><span style="font-family:arial,sans-serif"><span style="font-size:9pt">3×10<sup>-5</sup>±1</span></span></span><span style="color:#3f3f3f"><span style="font-family:宋体"><span style="font-size:9pt">个字</span></span></span></p></td></tr><tr><td><p style="text-align: left"><span style="color:#3f3f3f"><span style="font-family:宋体"><span style="font-size:9pt">夹具插头间距</span></span></span></p></td><td><p style="text-align: left"><span style="color:#3f3f3f"><span style="font-family:arial,sans-serif"><span style="font-size:9pt">25mm±0.01mm</span></span></span></p></td><td><p style="text-align: left"><span style="color:#3f3f3f"><span style="font-family:宋体"><span style="font-size:9pt">主电容调节范围</span></span></span></p></td><td><p style="text-align: center"><span style="color:#3f3f3f"><span style="font-family:arial,sans-serif"><span style="font-size:9pt">30-500/18-220pF</span></span></span></p></td></tr><tr><td><p style="text-align: left"><span style="color:#3f3f3f"><span style="font-family:宋体"><span style="font-size:9pt">测微杆分辨率</span></span></span></p></td><td><p style="text-align: left"><span style="color:#3f3f3f"><span style="font-family:arial,sans-serif"><span style="font-size:9pt">0.001mm</span></span></span></p></td><td><p style="text-align: left"><span style="color:#3f3f3f"><span style="font-family:宋体"><span style="font-size:9pt">主调电容误差</span></span></span></p></td><td><p style="text-align: center"><span style="color:#3f3f3f"><span style="font-family:arial,sans-serif"><span style="font-size:9pt"><1%</span></span></span><span style="color:#3f3f3f"><span style="font-family:宋体"><span style="font-size:9pt">或</span></span></span><span style="color:#3f3f3f"><span style="font-family:arial,sans-serif"><span style="font-size:9pt">1pF</span></span></span></p></td></tr><tr><td style="height: 7px"><p style="text-align: left"><span style="color:#3f3f3f"><span style="font-family:宋体"><span style="font-size:9pt">夹具损耗角正切值</span></span></span></p></td><td style="height: 7px; vertical-align: top"><p style="text-align: left"><span style="color:#3f3f3f"><span style="font-family:宋体"><span style="font-size:9pt">≦</span></span></span><span style="color:#3f3f3f"><span style="font-family:arial,sans-serif"><span style="font-size:9pt">4×10<sup>-4</sup> </span></span></span><span style="color:#3f3f3f"><span style="font-family:宋体"><span style="font-size:9pt">（</span></span></span><span style="color:#3f3f3f"><span style="font-family:arial,sans-serif"><span style="font-size:9pt">1MHz)</span></span></span></p></td><td style="height: 7px"><p style="text-align: left"><span style="color:#3f3f3f"><span style="font-family:arial,sans-serif"><span style="font-size:9pt">Q</span></span></span><span style="color:#3f3f3f"><span style="font-family:宋体"><span style="font-size:9pt">测试范围</span></span></span></p></td><td style="height: 7px"><p style="text-align: center"><span style="color:#3f3f3f"><span style="font-family:arial,sans-serif"><span style="font-size:9pt">2</span></span></span><span style="color:#3f3f3f"><span style="font-family:宋体"><span style="font-size:9pt">～</span></span></span><span style="color:#3f3f3f"><span style="font-family:arial,sans-serif"><span style="font-size:9pt">1023</span></span></span></p></td></tr><tr><td colspan="4" style="height: 8px"><p style="text-align: left"> </p></td></tr><tr><td colspan="4" style="height: 7px"><p style="text-align: center"><span style="color:#3f3f3f"><span style="font-family:宋体"><span style="font-size:9pt">附表二</span></span></span><span style="color:#3f3f3f"><span style="font-family:arial,sans-serif"><span style="font-size:9pt">,LKI-1</span></span></span><span style="color:#3f3f3f"><span style="font-family:宋体"><span style="font-size:9pt">电感组典型测试数据</span></span></span></p></td></tr><tr><td colspan="4" style="height: 8px"><table align="left" border="1" cellpadding="0" cellspacing="0" style="width:716px"><tbody><tr><td style="vertical-align: top; width: 83px"><p style="text-align: center"><span style="color:#3f3f3f"><span style="font-family:宋体"><span style="font-size:9pt">线圈号</span></span></span></p></td><td style="vertical-align: top; width: 105px"><p style="text-align: center"><span style="color:#3f3f3f"><span style="font-family:宋体"><span style="font-size:9pt">测试频率</span></span></span></p></td><td style="vertical-align: top; width: 91px"><p style="text-align: center"><span style="color:#3f3f3f"><span style="font-family:arial,sans-serif"><span style="font-size:9pt">Q</span></span></span><span style="color:#3f3f3f"><span style="font-family:宋体"><span style="font-size:9pt">值</span></span></span></p></td><td style="vertical-align: top; width: 111px"><p style="text-align: center"><span style="color:#3f3f3f"><span style="font-family:宋体"><span style="font-size:9pt">分布电容</span></span></span><span style="color:#3f3f3f"><span style="font-family:arial,sans-serif"><span style="font-size:9pt">p</span></span></span></p></td><td style="vertical-align: top; width: 119px"><p style="text-align: center"><span style="color:#3f3f3f"><span style="font-family:宋体"><span style="font-size:9pt">电感值</span></span></span></p></td></tr><tr><td style="vertical-align: top; width: 83px"><p style="text-align: center"><span style="color:#3f3f3f"><span style="font-family:arial,sans-serif"><span style="font-size:9pt">9</span></span></span></p></td><td style="vertical-align: top; width: 105px"><p style="text-align: center"><span style="color:#3f3f3f"><span style="font-family:arial,sans-serif"><span style="font-size:9pt">100KHz</span></span></span></p></td><td style="vertical-align: top; width: 91px"><p style="text-align: center"><span style="color:#3f3f3f"><span style="font-family:arial,sans-serif"><span style="font-size:9pt">98</span></span></span></p></td><td style="vertical-align: top; width: 111px"><p style="text-align: center"><span style="color:#3f3f3f"><span style="font-family:arial,sans-serif"><span style="font-size:9pt">9.4</span></span></span></p></td><td style="vertical-align: top; width: 119px"><p style="text-align: center"><span style="color:#3f3f3f"><span style="font-family:arial,sans-serif"><span style="font-size:9pt">25mH</span></span></span></p></td></tr><tr><td style="vertical-align: top; width: 83px"><p style="text-align: center"><span style="color:#3f3f3f"><span style="font-family:arial,sans-serif"><span style="font-size:9pt">8</span></span></span></p></td><td style="vertical-align: top; width: 105px"><p style="text-align: center"><span style="color:#3f3f3f"><span style="font-family:arial,sans-serif"><span style="font-size:9pt">400KHz</span></span></span></p></td><td style="vertical-align: top; width: 91px"><p style="text-align: center"><span style="color:#3f3f3f"><span style="font-family:arial,sans-serif"><span style="font-size:9pt">138</span></span></span></p></td><td style="vertical-align: top; width: 111px"><p style="text-align: center"><span style="color:#3f3f3f"><span style="font-family:arial,sans-serif"><span style="font-size:9pt">11.4</span></span></span></p></td><td style="vertical-align: top; width: 119px"><p style="text-align: center"><span style="color:#3f3f3f"><span style="font-family:arial,sans-serif"><span style="font-size:9pt">4.87mH</span></span></span></p></td></tr><tr><td style="vertical-align: top; width: 83px"><p style="text-align: center"><span style="color:#3f3f3f"><span style="font-family:arial,sans-serif"><span style="font-size:9pt">7</span></span></span></p></td><td style="vertical-align: top; width: 105px"><p style="text-align: center"><span style="color:#3f3f3f"><span style="font-family:arial,sans-serif"><span style="font-size:9pt">400KHz</span></span></span></p></td><td style="vertical-align: top; width: 91px"><p style="text-align: center"><span style="color:#3f3f3f"><span style="font-family:arial,sans-serif"><span style="font-size:9pt">202</span></span></span></p></td><td style="vertical-align: top; width: 111px"><p style="text-align: center"><span style="color:#3f3f3f"><span style="font-family:arial,sans-serif"><span style="font-size:9pt">16</span></span></span></p></td><td style="vertical-align: top; width: 119px"><p style="text-align: center"><span style="color:#3f3f3f"><span style="font-family:arial,sans-serif"><span style="font-size:9pt">0.99mH</span></span></span></p></td></tr><tr><td style="vertical-align: top; width: 83px"><p style="text-align: center"><span style="color:#3f3f3f"><span style="font-family:arial,sans-serif"><span style="font-size:9pt">6</span></span></span></p></td><td style="vertical-align: top; width: 105px"><p style="text-align: center"><span style="color:#3f3f3f"><span style="font-family:arial,sans-serif"><span style="font-size:9pt">1MHz</span></span></span></p></td><td style="vertical-align: top; width: 91px"><p style="text-align: center"><span style="color:#3f3f3f"><span style="font-family:arial,sans-serif"><span style="font-size:9pt">196</span></span></span></p></td><td style="vertical-align: top; width: 111px"><p style="text-align: center"><span style="color:#3f3f3f"><span style="font-family:arial,sans-serif"><span style="font-size:9pt">13</span></span></span></p></td><td style="vertical-align: top; width: 119px"><p style="text-align: center"><span style="color:#3f3f3f"><span style="font-family:arial,sans-serif"><span style="font-size:9pt">252μH</span></span></span></p></td></tr><tr><td style="vertical-align: top; width: 83px"><p style="text-align: center"><span style="color:#3f3f3f"><span style="font-family:arial,sans-serif"><span style="font-size:9pt">5</span></span></span></p></td><td style="vertical-align: top; width: 105px"><p style="text-align: center"><span style="color:#3f3f3f"><span style="font-family:arial,sans-serif"><span style="font-size:9pt">2MHz</span></span></span></p></td><td style="vertical-align: top; width: 91px"><p style="text-align: center"><span style="color:#3f3f3f"><span style="font-family:arial,sans-serif"><span style="font-size:9pt">198</span></span></span></p></td><td style="vertical-align: top; width: 111px"><p style="text-align: center"><span style="color:#3f3f3f"><span style="font-family:arial,sans-serif"><span style="font-size:9pt">8.7</span></span></span></p></td><td style="vertical-align: top; width: 119px"><p style="text-align: center"><span style="color:#3f3f3f"><span style="font-family:arial,sans-serif"><span style="font-size:9pt">49.8μH</span></span></span></p></td></tr><tr><td style="vertical-align: top; width: 83px"><p style="text-align: center"><span style="color:#3f3f3f"><span style="font-family:arial,sans-serif"><span style="font-size:9pt">4</span></span></span></p></td><td style="vertical-align: top; width: 105px"><p style="text-align: center"><span style="color:#3f3f3f"><span style="font-family:arial,sans-serif"><span style="font-size:9pt">4.5MHz</span></span></span></p></td><td style="vertical-align: top; width: 91px"><p style="text-align: center"><span style="color:#3f3f3f"><span style="font-family:arial,sans-serif"><span style="font-size:9pt">231</span></span></span></p></td><td style="vertical-align: top; width: 111px"><p style="text-align: center"><span style="color:#3f3f3f"><span style="font-family:arial,sans-serif"><span style="font-size:9pt">7</span></span></span></p></td><td style="vertical-align: top; width: 119px"><p style="text-align: center"><span style="color:#3f3f3f"><span style="font-family:arial,sans-serif"><span style="font-size:9pt">10μH </span></span></span></p></td></tr><tr><td style="vertical-align: top; width: 83px"><p style="text-align: center"><span style="color:#3f3f3f"><span style="font-family:arial,sans-serif"><span style="font-size:9pt">3</span></span></span></p></td><td style="vertical-align: top; width: 105px"><p style="text-align: center"><span style="color:#3f3f3f"><span style="font-family:arial,sans-serif"><span style="font-size:9pt">12MHz</span></span></span></p></td><td style="vertical-align: top; width: 91px"><p style="text-align: center"><span style="color:#3f3f3f"><span style="font-family:arial,sans-serif"><span style="font-size:9pt">193</span></span></span></p></td><td style="vertical-align: top; width: 111px"><p style="text-align: center"><span style="color:#3f3f3f"><span style="font-family:arial,sans-serif"><span style="font-size:9pt">6.9</span></span></span></p></td><td style="vertical-align: top; width: 119px"><p style="text-align: center"><span style="color:#3f3f3f"><span style="font-family:arial,sans-serif"><span style="font-size:9pt">2.49μH</span></span></span></p></td></tr><tr><td style="vertical-align: top; width: 83px"><p style="text-align: center"><span style="color:#3f3f3f"><span style="font-family:arial,sans-serif"><span style="font-size:9pt">2</span></span></span></p></td><td style="vertical-align: top; width: 105px"><p style="text-align: center"><span style="color:#3f3f3f"><span style="font-family:arial,sans-serif"><span style="font-size:9pt">12MHz</span></span></span></p></td><td style="vertical-align: top; width: 91px"><p style="text-align: center"><span style="color:#3f3f3f"><span style="font-family:arial,sans-serif"><span style="font-size:9pt">229</span></span></span></p></td><td style="vertical-align: top; width: 111px"><p style="text-align: center"><span style="color:#3f3f3f"><span style="font-family:arial,sans-serif"><span style="font-size:9pt">6.4</span></span></span></p></td><td style="vertical-align: top; width: 119px"><p style="text-align: center"><span style="color:#3f3f3f"><span style="font-family:arial,sans-serif"><span style="font-size:9pt">0.508μH</span></span></span></p></td></tr><tr><td style="vertical-align: top; width: 83px"><p style="text-align: center"><span style="color:#3f3f3f"><span style="font-family:arial,sans-serif"><span style="font-size:9pt">1</span></span></span></p></td><td style="vertical-align: top; width: 105px"><p style="text-align: center"><span style="color:#3f3f3f"><span style="font-family:arial,sans-serif"><span style="font-size:9pt">25MHz<br />50MHz</span></span></span></p></td><td style="vertical-align: top; width: 91px"><p style="text-align: center"><span style="color:#3f3f3f"><span style="font-family:arial,sans-serif"><span style="font-size:9pt">233<br />211</span></span></span></p></td><td style="vertical-align: top; width: 111px"><p style="text-align: center"><span style="color:#3f3f3f"><span style="font-family:arial,sans-serif"><span style="font-size:9pt">0.9</span></span></span></p></td><td style="vertical-align: top; width: 119px"><p style="text-align: center"><span style="color:#3f3f3f"><span style="font-family:arial,sans-serif"><span style="font-size:9pt">0.125μH</span></span></span></p></td></tr></tbody></table></td></tr></tbody></table><p><span style="font-size:16px"> </span></p><p><span style="font-size:16px"> </span></p></div> <div class="news-keyword">关键词：<a href="https://www.gkzhan.com/hot/2533.html" target="_blank">电导率</a><a href="https://www.gkzhan.com/hot/3654.html" target="_blank">测量仪器</a></div> </div> <div class="nextNews" style="font-size: 16px; color: #666;"> <p>上一篇：<a style="color: #168de3;" href="https://www.gkzhan.com/tech_news/detail/221025.html" 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