Resistance and capacitance analysis of Pd-doped and undoped SnO2 thick films sensors exposed to CO atmospheres

被引：9

作者：

Ponce, M. A. ^{[1
]}

Castro, M. S. ^{[1
]}

Aldao, C. M. ^{[1
]}

机构：

[1] Univ Nacl Mar Plata, CONICET, INTEMA, Inst Mat Sci & Technol, Mar Del Plata, Argentina

来源：

CERAMICS INTERNATIONAL | 2006年 / 32卷 / 07期

关键词：

films; surfaces; electrical properties; sensors;

D O I：

10.1016/j.ceramint.2005.05.013

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：

It was found that resistance and capacitance of Pd-doped SnO2 thick films are largely modified by CO reaction with previous adsorbed oxygen at the grain surface while in undoped SnO2 thick-films adsorption and reaction processes influence the response. In our analysis, the presence of Schottky potential barriers at the grain boundaries was consistent with the observed results. An increasing of sensitivity due to the addition of Pd is found to be related to the enhanced reaction of CO with the previous oxygen adsorbed at the grains surface. Mechanisms responsible for the sensor response are discussed. (c) 2005 Elsevier Ltd and Techna Group S.r.l. All rights reserved.

引用

页码：733 / 737

页数：5

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