Er掺杂ZnO-Bi_2O_3系亚微米柱状晶体及其压敏电阻性能  

ZnO-Bi_2O_3(Er)Series Sub-micron Columnar Crystals and the Varistor Performance

作　　者：王平[1] 李芳芳[1] 周小美[1] 李学帅[1] 谷雨[1] 李之锋[1] 吴思华[1] 杜晓钢 

机构地区：[1]江西理工大学材料与化学工程学院,江西赣州341000 [2]赣州威士达电子有限公司,江西赣州341000

出　　处：《江西理工大学学报》2009年第6期19-22,共4页Journal of Jiangxi University of Science and Technology

基　　金：江西省自然科学基金资助项目(0260018);江西省发改委(2006)资助项目

摘　　要：制备了Er掺杂ZnO-Bi2O3系烧结形成亚微米长柱状晶体;用X—射线衍射仪分析了ZnO-Bi2O(3Er)系物相成分;用电子显微镜观察ZnO-Bi2O(3Er)系亚微米长柱状晶相特征,晶体的长径比约为17;最后对其进行了压敏电阻性能的检测,随Er2O3含量的增加,ZnO纳米长柱状晶体向颗粒状过渡,电位梯度逐渐增大,非线性系数呈升高趋势,漏电流偏低,并且渐渐平缓.As new high functional material, ZnO-Bi2O3（Er）series sub-micron columnar crystals with specific properties in varistor ceramic are prepared. The phases of the ZnO-Bi2O3 （Er）are defined by X ray. The shape of sub-micron columnar crystals with which the aspect ratio is about 17 is merged by SEM. With increasing Er2O3 content, the ZnO-Bi2O3 （Er）tends back to grain size, and the voltage gradient and nonlinear coefficient increase, whereas the leakage current is lower than that of samples without Er2O3 as well as decreases slowly.

关 键 词：压敏陶瓷 稀土掺杂 柱状晶体 

分 类 号：TB32[一般工业技术—材料科学与工程]