Influence of La2O3, Pr2O3 and CeO2 on the nonlinear properties of SnO2 multicomponent varistors

被引：23

作者：

Oliveira, MM

Bueno, PR

Longo, E

Varela, JA

机构：

[1] UFSC, Ctr Multidisplinar Desenvolvimento Mat Ceram, Dept Quim, BR-13565905 Sao Carlos, SP, Brazil

[2] UNESP, Inst Quim, BR-14801970 Araraquara, SP, Brazil

来源：

MATERIALS CHEMISTRY AND PHYSICS | 2002年 / 74卷 / 02期

基金：

巴西圣保罗研究基金会;

关键词：

tin oxide; nonlinear properties; varistors;

D O I：

10.1016/S0254-0584(01)00458-8

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The influence of La2O3, Pr2O3 and CeO2 on a new class of polycrystalline ceramics with nonlinear properties based on SnO2, was investigated. La2O3 and Pr2O3 were found to precipitate at the grain boundary region, causing a considerable increase in the nonlinear behavior. It was found that CeO2 forms a solid solution in the bulk but. unlike La2O3 and Pr2O3, it does not increase the nonlinear behavior. A higher nonlinear coefficient of similar to80 was obtained for La2O3-doped SnO2-based systems. (C) 2002 Elsevier Science B.V. All rights reserved.

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收藏

页码：150 / 153

页数：4

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