Effect of B2O3 doping on the Microstructure and Electrical Properties of ZnO-based Varistors

摘要：

　　B2O3 doped ZnO-Bi2O3-Sb2O3-based varistors were fabricated by conventional solid state reaction method.The structure and electrical properties were investigated by XRD,SEM and electrical measurements.The grain size obviously increases with increasing B2O3 content,while the content of Zn7Sb2O12 spinel on the grain boundaries gradually decreases,which implies that B2O3 doping inhibits the growth of Zn7Sb2O12 spinel.The density (ρ) of ZnO varistors increases with increasing B2O3 content (x) and reaches the maximum at x =0.4 mol%.The sample with x ≈ 0.6 mol% sintered at 1150 ℃ exhibits the best performance,with nonlinear coefficient of 48 and leakage current of 4 μA.

关键词： ZnO varistors Boron oxide Non-linear

作者: Fenghua Liu Gaojie Xu Lei Duan Yali Li Ping Cui

作者单位: Ningbo Institute of Material Technology and Engineering,Chinese Academy of Sciences,Ningbo 315201,Ch Ningbo Institute of Material Technology and Engineering,Chinese Academy of Sciences,Ningbo 315201,Ch

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: 497-499

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）