Sodium impurities in ZnO-Bi2O3-Sb2O3 based varistors

被引：23

作者：

Peiteado, M. ^{[1
]}

Iglesias, Y. ^{[1
]}

Caballero, A. C. ^{[1
]}

机构：

[1] CSIC, Inst Ceram & Vidrio, Dept Electroceram, Madrid 28049, Spain

来源：

CERAMICS INTERNATIONAL | 2011年 / 37卷 / 03期

关键词：

A. Grain growth; C. Electrical conductivity; D; ZnO; E; Varistors; Alkaline impurities; ZNO VARISTOR; DIELECTRIC-SPECTROSCOPY; MICROSTRUCTURE; ADMITTANCE; IMPEDANCE; STABILITY; REGION; SYSTEM; SB2O3;

D O I：

10.1016/j.ceramint.2010.10.016

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Sodium impurities are frequently present in the raw oxides that constitute the complex formulation of ZnO-Bi2O3-Sb2O3 based varistors. But actually little is known about their effect on the microstructure and the electrical response of these materials. This is the main goal of the present contribution and according to the obtained results an excessive presence of this alkaline impurity can lead to a compositional change in the Bi-rich skeleton of the varistor microstructure. As a consequence the grain growth kinetics, the densification rate and the characteristic non-linear I-V response of these electroceramics are seriously affected. (C) 2010 Elsevier Ltd and Techna Group S.r.l. All rights reserved.

引用

页码：819 / 824

页数：6

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