Microstructure and Varistor Properties of ZVMND Ceramics with Sintering Temperature

被引：1
|
作者：
Nahm, Choon-Woo [1 ]
机构：
[1] Dong Eui Univ, Dept Elect Engn, Semicond Ceram Lab, Busan 47340, South Korea
来源：
TRANSACTIONS ON ELECTRICAL AND ELECTRONIC MATERIALS | 2015年 / 16卷 / 04期
关键词：
Vanadium-doped zinc oxide ceramics; Dy2O3; Sintering; Microstructure; Electrical properties; Varistors;
D O I：
10.4313/TEEM.2015.16.4.221
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The sintering effect on the microstructure, electrical properties, and dielectric characteristics of ZnO-V2O5-MnO2Nb2O5-Dy2O3-based ceramics was investigated. With the increase of sintering temperature from 875 to 950 degrees C density of the sintered pellets decreased from 5.57 to 5.45 g/cm(3) and the average grain size increased from 4.3 to 10.9 mu m. The breakdown field decreased noticeably from 6,095 to 996 V/cm with the increase of sintering temperature. The varistor ceramics sintered at 900 degrees C exhibited the best nonlinear properties: 39.2 in the nonlinear coefficient and 0.24 mA/cm(2) in the leakage current density. The dielectric constant increased sharply from 658.6 to 2,928.8 with the increase of sintering temperature. On the whole, the dissipation factor exhibited a fluctuation with the increase of the sintering temperature, and a minimum value of 0.284 at 900 degrees C
引用
收藏
页码：221 / 225
页数：5
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