Effect of Sintering Temperature on Electrical Properties of WO3-Based Capacitor-Varistor Ceramics

被引：0
|
作者：
Wang Tianguo [1 ]
Shao Gangqin [1 ]
Li Xibao [1 ]
Zhang Wenjun [1 ]
机构：
[1] Wuhan Univ Technol, State Key Lab Adv Technol Mat Synth & Proc, Wuhan 430070, Peoples R China
来源：
RARE METAL MATERIALS AND ENGINEERING | 2009年 / 38卷
关键词：
varistors; sintering temperature; tungsten trioxide; electrical properties;
D O I：
暂无
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The effect of sintering temperature on the microstructure, nonlinear electrical behavior, and dielectric properties of the Y2O3-doped WO3 ceramics was studied. The decrease in breakdown voltage directly relates to the grain growth of WO3 grains when increasing the sintering temperatures from 1050 to 1200 degrees C. The capacitor-varistor of WO3- 0.8 mol% Y2O3 composite sintered at 1150 degrees C exhibits the maximal nonlinear coefficient of 3.5 and the highest dielectric constant of 1.13 x 10(4). However, higher sintering temperature than 1150 degrees C is not favorable for the nonlinear electrical behavior of the WO3 ceramics. The best nonlinear properties of the samples sintered at 1150 degrees C can be explained by the most efficient boundary barrier layer with can be formed sintered at the proper temperature.
引用
收藏
页码：329 / 332
页数：4
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