SENSING PROPERTIES OF LNMO3/SNO2 (LN = RARE-EARTH, M = CR, CO, MN, FE) HAVING A HETEROJUNCTION

被引：25

作者：

MITSUOKA, M

OTOFUJI, A

ARAKAWA, T

机构：

[1] Department of Industrial Chemistry, Faculty of Engineering, Kinki University in Kyushu, Iizuka, Fukuoka, 820, Kayanomori

来源：

SENSORS AND ACTUATORS B-CHEMICAL | 1992年 / 9卷 / 03期

关键词：

D O I：

10.1016/0925-4005(92)80217-L

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

The I-V characteristics and sensing properties are investigated for an LnMO3/SnO2 (Ln = rare earth, M = transition metal) element prepared by mechanically contacting two sintered pellets. For LnCrO3/SnO2 and LnCoO3/SnO2 definitive non-ohmic curves are obtained. The rectification effect becomes weak on going from LnCrO3/SnO2 to LnFeO3/SnO2. This could be due to the formation of a p-n junction between LnCrO3 or LnCoO3 and SnO2. For the elements in which part of the Sm3+ ions in SmMnO3 and SmCoO3 were replaced by Sr2+ ions, the non-ohmic behaviour is more clearly developed than that for the parent perovskite oxide. I-V curves of these elements become ohmic when reducing agents are introduced into the stream of dry air.

引用

页码：205 / 207

页数：3

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