Effect of Sintering Temperature on Electrical Properties of WO3-Based Capacitor-Varistor Ceramics
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 ”C. The capacitor-varistor of WO3- 0.8 mol％ Y2O3 composite sintered at 1150 °C exhibits the maximal nonlinear coefficient of 3.5 and the highest dielectric constant of 1.13 x 104. However, higher sintering temperature than 1150 °C is not favorable for the nonlinear electrical behavior of the WO3 ceramics. The best nonlinear properties of the samples sintered at 1150 ”C can be explained by the most efficient boundary barrier layer with can be formed sintered at the proper temperature.
varistors sintering temperature tungsten trioxide electrical properties
Wang Tianguo Shao Gangqin Li Xibao Zhang Wenjun
State Key Laboratory of Advanced Technology for Materials Synthesis & Processing, Wuhan University of Technology, Wuhan 430070, China
国内会议
沈阳
英文
329-332
2008-09-01（万方平台首次上网日期，不代表论文的发表时间）