CO2-sensing characteristics of SnO2 thick film by coating lanthanum oxide

被引：105

作者：

Kim, DH ^{[1
]}

Yoon, JY ^{[1
]}

Park, HC ^{[1
]}

Kim, KH ^{[1
]}

机构：

[1] Pusan Natl Univ, Dept Inorgan Mat Engn, Kumjeong Ku, Pusan 609735, South Korea

来源：

SENSORS AND ACTUATORS B-CHEMICAL | 2000年 / 62卷 / 01期

基金：

新加坡国家研究基金会;

关键词：

CO2; gas; SnO2 thick film; La-coating;

D O I：

10.1016/S0925-4005(99)00305-6

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

CO2 gas-sensor was fabricated by coating and heat-treating the drop of LaCl3 . 7H(2)O solution on the surface of SnO2 thick film. The effects of several factors, such as heat-treatment temperature, La concentration of coating-drop and humidity on CO2 sensitivity of thick film sensor were investigated in this work. The starting material, LaCl3 . 7H(2)O, for coating was phase-transformed by heat-treating, from LaCl3 to LaOCl at temperature range of 367-738 degrees C, and from LaOCl to La2O3 over 773 degrees C. The maximum sensitivity appeared at heat-treatment temperature of 1000 degrees C and La concentration of 1 x 10(-2) M La. The sensitivity showed a tendency to decrease remarkably with increasing humidity as well as with decreasing oxygen partial pressure. (C) 2000 Elsevier Science S.A. All rights reserved.

引用

页码：61 / 66

页数：6

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