Influence of Ta2O5 on the electrical properties of ZnO- and CoO-doped SnO2 varistors

被引：11
|
作者：
Filho, FM
Simoes, AZ
Ries, A
Silva, IP
Perazolli, L
Longo, E
Varela, JA
机构：
[1] UNESP, Inst Quim, BR-14800900 Araraquara, SP, Brazil
[2] UFSCar, Dept Quim, Lab Interdisciplinar Eletroquim & Ceram, BR-13565905 Sao Carlos, SP, Brazil
来源：
CERAMICS INTERNATIONAL | 2004年 / 30卷 / 08期
基金：
巴西圣保罗研究基金会;
关键词：
powders : solid state reaction; varistors; tin dioxide;
D O I：
10.1016/j.ceramint.2004.01.007
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：
SnO2-based varistors doped with 0.5% cobalt, 0.5% zinc and various tantalum amounts were prepared by the solid-state route. Experimental evidence shows that small quantities of Ta2O5 improve the nonlinear properties of the samples significantly. It was found that samples doped with 0.05 mol% Ta2O5 exhibit the highest density (98.5%), the lowest electric breakdown field (E-b = 1050 V/cm) and the highest coefficient of nonlinearity (alpha = 11.5). The effect of Ta2O5 dopant could be explained by the substitution of Ta5+ by Sn4+. (C) 2004 Elsevier Ltd and Techna S.r.l. All rights reserved.
引用
收藏
页码：2277 / 2281
页数：5
相关论文
共 50 条
  • [1] Dependence of La2O3 content on the nonlinear electrical behaviour of ZnO, CoO and Ta2O5 doped SnO2 varistors
    Silva, I. P.
    Simoes, A. Z.
    Filho, F. M.
    Longo, E.
    Varela, J. A.
    Perazolli, L.
    MATERIALS LETTERS, 2007, 61 (10) : 2121 - 2125
  • [2] Nonlinear electrical properties of SnO2•Li2O•Ta2O5 varistors
    Li, CP
    Wang, JF
    Su, WB
    Chen, HC
    Wang, WX
    Zang, GZ
    Xu, L
    CERAMICS INTERNATIONAL, 2002, 28 (05) : 521 - 526
  • [3] Nonlinear electrical behaviour of the Cr2O3, ZnO, CoO and Ta2O5-doped SnO2 varistors
    Filho, FM
    Simoes, AZ
    Ries, A
    Perazolli, L
    Longo, E
    Varela, JA
    CERAMICS INTERNATIONAL, 2006, 32 (03) : 283 - 289
  • [4] Nonlinear electrical behaviour of the SnO2•CoO•Ta2O5 system
    Antunes, AC
    Antunes, SRM
    Pianaro, SA
    Rocha, MR
    Longo, E
    Varela, JA
    JOURNAL OF MATERIALS SCIENCE LETTERS, 1998, 17 (07) : 577 - 579
  • [5] Effects of Er2O3 on electrical properties of the SnO2•CoO•Ta2O5 varistor system
    Wang, CM
    Wang, JF
    Chen, HC
    Su, WB
    Zang, GZ
    Qi, P
    CHINESE PHYSICS LETTERS, 2004, 21 (04) : 716 - 719
  • [6] Microstructure development and nonlinear electrical characteristics of the SnO2·CuO·Ta2O5 based varistors
    Chun-Ming Wang
    Jin-Feng Wang
    Wen-Bin Su
    Hong-Cun Chen
    Guo-Zhong Zang
    Peng Qi
    Journal of Materials Science, 2005, 40 : 6459 - 6462
  • [7] Electrical properties of SnO2•CuO•Ta2O5 varistor system
    Wang, CM
    Wang, JF
    Su, WB
    Zang, GZ
    Qi, P
    MATERIALS LETTERS, 2005, 59 (2-3) : 201 - 204
  • [8] Effects of Ta2O5 on the electrical properties of SnO2•CuO ceramics
    Wang, CM
    Wang, JF
    Su, WB
    Zang, GZ
    Qi, P
    JOURNAL OF PHYSICS D-APPLIED PHYSICS, 2005, 38 (09) : 1485 - 1488
  • [9] Electrical nonlinearity of (Ni, Ta) doped SnO2 varistors
    Wang, JF
    Chen, HC
    Wang, WX
    Su, WB
    Zang, GZ
    MATERIALS SCIENCE AND ENGINEERING B-SOLID STATE MATERIALS FOR ADVANCED TECHNOLOGY, 2003, 99 (1-3): : 465 - 469
  • [10] Effects of Ta2O5 on the grain size and electrical properties of SnO2-based varistors
    Wang, CM
    Wang, JF
    Chen, HC
    Wang, WX
    Su, WB
    Zang, GZ
    Qi, P
    JOURNAL OF PHYSICS D-APPLIED PHYSICS, 2003, 36 (23) : 3069 - 3072
12345