Effects of La2O3 Doping on Electrical Properties of Zn-Pr Based Varistor Ceramics

被引：0
|
作者：
Liu J. [1 ,3 ]
Xu Y. [2 ,3 ]
Cao W. [1 ,3 ]
Zhang R. [2 ,3 ]
Song F. [1 ,3 ]
Xie X. [2 ,3 ]
Qiao Y. [2 ,3 ]
机构：
[1] School of Arts and Sciences, Shaanxi University of Science and Technology, Xi'an
[2] School of Materials Science & Engineering, Shaanxi University of Science and Technology, Xi'an
[3] Research Center for Semiconductor Materials and Devices, Shaanxi University of Science and Technology, Xi'an
来源：
Kuei Suan Jen Hsueh Pao/Journal of the Chinese Ceramic Society | 2020年 / 48卷 / 03期
关键词：
Dielectric properties; Impedance characteristic; Lanthanum oxidedoping; Nonlinear coefficient; Zinc oxide varistor;
D O I：
10.14062/j.issn.0454-5648.20190396
中图分类号：
学科分类号：
摘要：
The ZnO-Pr6O11-Co2O3-Cr2O3-La2O3 varistors were prepared by solid state sintering method. The effect of La2O3 doping on the microstructure, varistor property, and dielectric characteristics of the ZnO varistor ceramics were studied in detail. The results show that the ZnO varistor has the best overall performance with La2O3 content of 1.5%(in mole fraction), the grain size is the smallest and uniform, the breakdown voltage E1Mais the highest (752V/mm), the nonlinear coefficient is large (12), the grain boundary capacitance is the largest (276pF), and the loss tangent is relatively low. © 2020, Editorial Department of Journal of the Chinese Ceramic Society. All right reserved.
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页码：337 / 342
页数：5
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