The influence of sintering process and atmosphere on the non-ohmic properties of SnO2 based varistor

被引：103

作者：

Leite, ER

Nascimento, AM

Bueno, PR

Longo, E

Varela, JA

机构：

[1] Univ Fed Sao Carlos, Dept Quim, BR-13560 Sao Carlos, SP, Brazil

[2] Univ Estadual Paulista, Inst Quim, BR-14800 Araraquara, SP, Brazil

来源：

JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS | 1999年 / 10卷 / 04期

基金：

巴西圣保罗研究基金会;

关键词：

D O I：

10.1023/A:1008933004042

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

The non-ohmic properties of the 98.95% SnO2 + 1.0 CoO + 0.05 Nb2O5 (all in mole%) system, as well as the influence of sintering temperature and atmosphere on these properties, were characterized in this study. The maximum non-linear coefficient (alpha = 32) was obtained for a sintering temperature of 1300 degrees C in an oxygen atmosphere and this maximum is associated with the presence of O in SnO2 grain boundaries, as interface defects. Experimental results also indicate thermionic-type conduction mechanisms, which are associated with the potential barrier of Schottky or Poole-Frenkel types.

引用

页码：321 / 327

页数：7

共 19 条

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