Evaluation of SrTi1-yNbyO3+δ materials for gas sensors

被引：23

作者：

Abrantes, JCC

Labrincha, JA

Frade, JR ^{[1
]}

机构：

[1] Univ Aveiro, Ceram & Glass Engn Dept UIMC, P-3810 Aveiro, Portugal

[2] ESTG, Inst Politecn Viana do Castelo, P-4901 Viana Do Castelo, Portugal

来源：

SENSORS AND ACTUATORS B-CHEMICAL | 1999年 / 56卷 / 03期

关键词：

strontium titanate; oxygen sensors; porous materials; defect chemistry;

D O I：

10.1016/S0925-4005(99)00029-5

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

Porous samples were used to evaluate the dependence of electrical conductivity on the oxygen partial pressure. Results obtained with these porous samples revealed that Nb for Ti substitution suppresses the p-type contribution even in oxidizing conditions, and enhances the n-type conductivity. The conductivity of porous SrTi1-yNbyO3+delta samples can be described by the power law dependence on p(O2)(-1/4), except possibly in very reducing conditions. The response time of porous samples is short, as required for resistive oxygen sensors. (C) 1999 Elsevier Science S.A. All rights reserved.

引用

页码：198 / 205

页数：8

共 21 条

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