Manganese oxide-manganese tungstate composite humidity sensors

被引：37

作者：

Raj, AMES

Mallika, C

Sreedharan, OM

Nagaraja, KS ^{[1
]}

机构：

[1] Loyola Coll, Dept Chem, Chennai 600034, Tamil Nadu, India

[2] Loyola Coll, Loyola Inst Frontier Energy, Chennai 600034, Tamil Nadu, India

[3] Indira Gandhi Ctr Atom Res, Thermodynam & Kinet Div, Kalpakkam, Tamil Nadu, India

来源：

MATERIALS LETTERS | 2002年 / 53卷 / 4-5期

关键词：

composites; electrical properties; humidity sensor; manganese oxides; manganese tungstate;

D O I：

10.1016/S0167-577X(01)00499-2

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Experimental results on composites fabricated from different mole percent of MnWO4 and Mn2O3 for humidity sensing are described. Sintered polycrystalline disks of the composites were subjected to d.c. electrical conductivity measurements over the temperature range of 373 - 573 K in inert atmosphere from which the activation energies were determined. The terminal phases and the composites were subjected to d.c. resistance measurements as a function of relative humidity in the range of 5-98% RH, achieved by various water buffers at 298 K. The sensitivity factor, S-f (R-5/R-98) measured at 298 K revealed that the composite MWMO-82 has the highest sensitivity, greater than 4 x 10(3). The response and recovery characteristics of MWMO-82 were assessed. (C) 2002 Published by Elsevier Science B.V.

引用

页码：316 / 320

页数：5

共 12 条

[1]

ARAI H, 1990, SENSORS COMPREHENSIV, V7, P999

[2]

CARTALINI C, 1994, SENSOR ACTUAT B-CHEM, V18, P437

[3] MICROSTRUCTURE AND ELECTRICAL-PROPERTIES OF MGAL2O4 THIN-FILMS FOR HUMIDITY SENSING [J].