A microstructural model of semiconducting gas sensor response: The effects of sintering temperature on the response of chromium titanate (CTO) to carbon monoxide

被引：138

作者：

Naisbitt, SC ^{[1
]}

Pratt, KFE ^{[1
]}

Williams, DE ^{[1
]}

Parkin, IP ^{[1
]}

机构：

[1] UCL, Dept Chem, Christopher Ingold Labs, London WC1H 0AJ, England

来源：

SENSORS AND ACTUATORS B-CHEMICAL | 2006年 / 114卷 / 02期

基金：

英国工程与自然科学研究理事会;

关键词：

CTO; gas sensor response; model of microstructure;

D O I：

10.1016/j.snb.2005.07.058

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

A simple model of the microstructure of a sensor as a network of three resistors, representing the surface, the bulk and the particle boundary, is combined with a simple model of sensor response in order to understand the effects of sintering temperature on response of a ceramic gas-sensitive resistor. This description accurately fitted the response of chromium titanium oxide to carbon monoxide over a range of four orders of magnitude in gas concentration. The parameters representing the microstructure are found to vary with sintering temperature according to predictions made from microscopy of the structures. The parameter representing chemistry also varied with sintering temperature: understandable because titanium segregation, which is the major determinant of the charge carrier distribution, varies with sintering temperature. (c) 2005 Elsevier B.V. All rights reserved.

引用

页码：969 / 977

页数：9

共 17 条

[1] Ozone sensors based on WO3:: a model for sensor drift and a measurement correction method [J].

Aliwell, SR ;

Halsall, JF ;

Pratt, KFE ;

O'Sullivan, J ;

Jones, RL ;

Cox, RA ;

Utembe, SR ;

Hansford, GM ;

Williams, DE .

MEASUREMENT SCIENCE AND TECHNOLOGY, 2001, 12 (06) :684-690

[2] A simple equivalent circuit model to represent microstructure effects on the response of semiconducting oxide-based gas sensors [J].

Chabanis, G ;

Parkin, IP ;

Williams, DE .

MEASUREMENT SCIENCE AND TECHNOLOGY, 2003, 14 (01) :76-86

[3] Microspheres of the gas sensor material Cr2-xTixO3 prepared by the sol-emulsion-gel route [J].

Chabanis, G ;

Parkin, IP ;

Williams, DE .

JOURNAL OF MATERIALS CHEMISTRY, 2001, 11 (06) :1651-1655

[4]

LUTHRA V, UNPUB

[5] CHEMISORPTION STATES OF IONIC LATTICES [J].

MARK, P .

JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS, 1968, 29 (04) :689-&

[6] Experimental and computational study of the gas-sensor behaviour and surface chemistry of the solid-solution Cr2-xTixO3 (x≤0.5) [J].

Niemeyer, D ;

Williams, DE ;

Smith, P ;

Pratt, KFE ;

Slater, B ;

Catlow, CRA ;

Stoneham, AM .

JOURNAL OF MATERIALS CHEMISTRY, 2002, 12 (03) :667-675

[7]

PRATT K, COMMUNICATION

[8]

RASBAND W, IMAGEJ VERSION 1 30

[9]

Scott RWJ, 2001, ADV MATER, V13, P1468, DOI 10.1002/1521-4095(200110)13:19<1468::AID-ADMA1468>3.0.CO

[10]

2-O

← 1 2 →