Influence of Bi2WO6 on Electric Properties of ZnO Varistor Ceramics

被引：0
|
作者：
Lin W. [1 ]
He X. [1 ]
Xu Z. [1 ]
Wang Z. [1 ]
Chu R. [1 ]
机构：
[1] School of Environmental Materials and Engineering, Yantai University, Yantai
来源：
Cailiao Yanjiu Xuebao/Chinese Journal of Materials Research | 2020年 / 34卷 / 04期
关键词：
Bi[!sub]2[!/sub]WO[!sub]6[!/sub; Electrical properties; Inorganic non-metallic materials; Microstructure; ZnO varistor ceramics;
D O I：
10.11901/1005.3093.2019.367
中图分类号：
学科分类号：
摘要：
The ZnO-based varistor ceramics with addition of different amount of Bi2WO6 were prepared by conventional solid state reaction and then their surface morphology and electrical properties were examined. Results show that appropriate Bi2WO6-dopping can promote the uniform growth of ZnO varistor ceramic grains, improve their uniformity of microstructure, reduce the breakdown voltage and increase the nonlinear coefficient. In addition, Bi2WO6 can increase the content of absorbed oxygen on the surface of ZnO, thereby enhance the density of the interfacial state and barrier height, correspondingly, optimize the nonlinear characteristic of ZnO varistor ceramics. For the ZnO-based varistor ceramics with x=7% (mass fraction) Bi2WO6, presents excellent properties: the nonlinear coefficient α is as high as 53, corresponding to the highly barrier height φ b of 11.52 eV, whilst the leakage current J L and the breakdown voltage are as low as 3.50 μA/cm2 and 263 V/mm, respectively. © All right reserved.
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页码：285 / 290
页数：5
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