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无机材料学报

无机材料学报

• 研究论文 • 上一篇    下一篇

Pr6O11掺杂对ZnO-Bi2O3系压敏材料性能影响的研究

朱建锋1,2, 罗宏杰3, 王芬1   

  1. 1. 陕西科技大学材料科学与工程学院, 咸阳 712081;
    2. 西安交通大学材料科学与工程学院, 西安 710049;
    3. 中国科学院上海硅酸盐研究所, 上海 200050)
  • 收稿日期:2005-02-24 修回日期:2005-06-02 出版日期:2006-03-20 网络出版日期:2006-03-20

Effects of Doped Pr6O11 on the Properties of ZnO-Bi2O3 System Varistors

ZHU Jian-Feng1,2, LUO Hong-Jie3, WANG Fen1   

  1. 1. Shaanxi University of Science \& Technology, Xianyang 712081, China;
    2. Xi'an Jiaotong University, Xi'an 710049, China;
    3. Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China
  • Received:2005-02-24 Revised:2005-06-02 Published:2006-03-20 Online:2006-03-20

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摘要： 采用稀土氧化物Pr6O11对ZnO-Bi2O3系压敏材料进行了改性研究, 探讨了Pr6O11对该材料
主要性能及微观结构的影响. 结果表明, Pr6O11掺杂量较小时, 能够显著提高ZnO压敏材料非线性系数, 减小漏电流, 并基本不影响压敏电压. 当Pr6O11掺杂达到一定量时, 在保持较高非线性系数, 较小漏电流的同时, 压敏电压与不含Pr6O11的ZnO压敏材料相比提高约60%; XRD、SEM等分析表明Pr6O11的引入改变了原有材料的微观结构组织, 使该材料微观结构中ZnO晶粒尺寸减小,
分布均匀、致密.

关键词: 稀土氧化物, 压敏材料, 电性能, 微观结构

Abstract: The ZnO-Bi2O3 system varistors were modified by doping with rare-earth oxide Pr6O11 and their electrical properties and microstructure were investigated. The results of experiment indicate that adding a small scale of Pr6O11 would increase the nonlinear coefficient greatly and decrease the leakage current with no change in threshold voltage. When the Pr6O11 content reaches to 7wt%, the threshold voltage increases by about 60%, whereas the leakage current and nonlinear coefficient are unchangable. The SEM and XRD analyses testify that Pr6O11 makes the microstructure of the materials more uniform and compact.

Key words: rare-earth oxide, varistors materials, electrical properties, microstructure

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