Influence of Pr6O11 on the Characteristics and Microstructure of Zinc Varistors

摘要：

　　The influence of the amount of Pr6O11 additions on the microstructure and electrical properties of varistors ceramics in the ZnO-Bi2O3 system was investigated.Samples with a low level of Pr6O11 (0.1wt %) have high microstructural homogeneity,which enhances the nonlinear coefficient greatly,and decreases the leakage current without change of voltage ratio.When the Pr6O11 content reached 7wt%,the ZnO grain growth was restricted and the threshold voltage was improved from 275v/ram to 440v/mm.The additive of Pr6O11 changed the process of creating spinel phase,which came from the decomposition of pyrochlore phase.This type of small size phase has more dragging force on the ZnO crystal,which make the whole materials more uniform and compact.

关键词： Rare-earth Pr6O11 Electrical Properties Microstructure

作者: Jianfeng Zhu Jiqiang Gao Fen Wang Ping Chen

作者单位: Shaanxi University of Science & Technology,Xianyang 712081,China;State Key Laboratory for Mechanical State Key Laboratory for Mechanical Behavior of Materials,Xian Jiaotong University,Xian 710049,Chi Shaanxi University of Science & Technology,Xianyang 712081,China

会议类型: 国际会议

会议名称: The Fifth China International Conference on High-Performance Ceramics (第五届先进陶瓷国际研讨会(CICC-5))

会议地点: 长沙

会议语种:英文

页码: 500-502

在线出版日期: 2007-05-10（万方平台首次上网日期，不代表论文的发表时间）