Development of NOx sensing devices based on YSZ and oxide electrode aiming for monitoring car exhausts

被引：71

作者：

Miura, N ^{[1
]}

Nakatou, M ^{[1
]}

Zhuiykov, S ^{[1
]}

机构：

[1] Kyushu Univ, Art Sci & Technol Ctr Cooperat Res, Kasuga, Fukuoka 8168580, Japan

来源：

CERAMICS INTERNATIONAL | 2004年 / 30卷 / 07期

关键词：

ceramic NOx sensors; solid electrolytes; ZnCr2O4; ZnFe2O4; stabilized zirconia; mixed potential; complex impedance;

D O I：

10.1016/j.ceramint.2003.12.014

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：

Recent progress in the development of zirconia-based sensing devices using zinc-family oxide electrodes for both mixed-potential and complex impedance-based types has been focused on the detection of NOx in the temperature range of 600-700degreesC. The sensing characteristics of these sensors were investigated in different gaseous environments. The mixed-potential-type NOx sensor using ZnFe2O4 sensing electrode (SE) have shown the highest sensitivity to NOx among other spinel-type oxides tested as SEs in the temperature range of 600-700degreesC. It was also shown that the complex-impedance-based NOx sensor attached with ZnCr2O4-SE gave rather good sensing characteristics to NOx at 700degreesC. Furthermore, it was discovered that the sensitivity to NO is almost equal to the sensitivity to NO2 from 0 to 200 ppm for this sensor at 700degreesC. The observed NOx sensitivity and the measured NOx concentration had almost linear correlation even in the presence of 8 vol.% H2O and 15 vol.% CO2. Based on the results obtained, we proposed laminated-type sensor structure that is the best for the present complex impedance-based NOx sensor. (C) 2004 Elsevier Ltd and Techna Group S.r.1. All rights reserved.

引用

页码：1135 / 1139

页数：5

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