SnO2-TiO2 solid solutions for gas sensors

被引：144

作者：

Radecka, M

Zakrzewska, K

Rekas, M

机构：

[1] Univ Min & Met, Krakow, Poland

[2] Australian Nucl Sci & Technol Org, Div Mat, Lucas Hts Sci & Technol Ctr, Menai, NSW 2234, Australia

来源：

SENSORS AND ACTUATORS B-CHEMICAL | 1998年 / 47卷 / 1-3期

关键词：

gas sensors; gas-solid interaction; polycrystalline ceramics;

D O I：

10.1016/S0925-4005(98)00023-9

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

Mixed oxide gas sensors of SnO2-TiO2 have been prepared in the form of polycrystalline ceramics and rf-sputtered thin films. The influence of the chemical and phase composition on the crystallographic structure, microstructure and sensor performance is discussed. The measurements of the electrical resistance as a function of hydrogen partial pressure have been performed with air or argon as a reference gas. The results are analyzed in terms of the surface and bulk interaction models. It is proposed that hydrogen detection in air involves the preadsorbed O- species. Hydrogen interaction with the SnO2-TiO2 system in Ar atmosphere is governed by bulk diffusion of oxygen vacancies. (C) 1998 Elsevier Science S.A. All rights reserved.

引用

页码：194 / 204

页数：11

共 17 条

[1] SOLID-STATE GAS SENSORS - A REVIEW [J].