Microstructure and Electrical Properties of La2O3-doped ZnO-Bi2O3 based Varistor Ceramics

被引：27
|
作者：
Xu, Dong [1 ]
Cheng, Xiaonong [1 ]
Wang, Mingsong [1 ]
Shi, Liyi [2 ]
机构：
[1] Jiangsu Univ, Sch Mat Sci & Engn, Zhenjiang 212013, Peoples R China
[2] Shanghai Univ, Res Ctr Nano Sci & Technol, Shanghai 200041, Peoples R China
来源：
MULTI-FUNCTIONAL MATERIALS AND STRUCTURES II, PTS 1 AND 2 | 2009年 / 79-82卷
关键词：
varistors; zinc oxide; rare earth; electrical properties; microstructure; ZNO VARISTORS; VOLTAGE;
D O I：
10.4028/www.scientific.net/AMR.79-82.2007
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
La2O3-doped ZnO-Bi2O3-based varistor ceramics were obtained by a solid reaction route, and the microstructure and electrical properties of the varistor ceramics were studied in this paper. The results showed with addition of 0-1.00mol% La2O3, La2O3-doped ZnO-based varistor ceramics were prepared in this paper with the voltage gradient of 77-503V/mm, the nonlinear coefficient of 2.4-36.8, and the leakage current of 0.09-494 mu A. The results also showed with addition of 0.08mol% La2O3, La2O3-doped ZnO-based varistor ceramics exhibit comparatively ideal comprehensive electrical properties. Such as the threshold voltage was 320V/mm, the nonlinear coefficient was 36.8 and the leakage current was 0.29 mu A. The doping of La2O3 affects the form and decomposition of the pyrochlore.
引用
收藏
页码：2007 / +
页数：2
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