SENSING PROPERTIES AND MECHANISM OF A PLANAR CARBON-DIOXIDE SENSOR USING MAGNESIA-STABILIZED ZIRCONIA AND LITHIUM-CARBONATE AUXILIARY PHASE

被引：47

作者：

MIURA, N

YAN, Y

NONAKA, S

YAMAZOE, N

机构：

[1] Department of Materials Science and Technology, Graduate School of Engineering Sciences, Kyushu University, Kasuga-shi

来源：

JOURNAL OF MATERIALS CHEMISTRY | 1995年 / 5卷 / 09期

关键词：

D O I：

10.1039/jm9950501391

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

A planar electrochemical device using MgO-stabilized zirconia (MSZ) and Li2CO3 has been fabricated for potentiometric sensing of CO2. The emf response of the device to CO2 followed the Nernst equation well in the concentration range 100-2000 mu l l(-1) at 500-650 degrees C, and was kept unchanged with a variation in the concentration of coexistent O-2, NO, NO2, H-2 or H2O. The rates of response and recovery were fairly rapid, attaining 90% of the changes in 10 s and 2 min, respectively, for 100-1000 mu l l(-1) CO2 at 550-600 degrees C. The electrochemical chain as well as the emf response to CO2 of the novel device can be explained by considering the formation of Li2ZrO3 between MSZ (O2- conductor) and Li2CO3 (Li+ conductor) as an 'ionic bridge'.

引用

页码：1391 / 1394

页数：4

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