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High Temperature Humidity Sensing Materials

Published online by Cambridge University Press:  21 February 2011

Ping Ping Tsai ,
Shigeo Tanase  and
Martha Greenblatt
Ping Ping Tsai
Affiliation:
Rutgers, The State University of New Jersey Dept. of Chemistry New Brunswick, New Jersey 08903
Shigeo Tanase
Affiliation:
Rutgers, The State University of New Jersey Dept. of Chemistry New Brunswick, New Jersey 08903
Martha Greenblatt*
Affiliation:
Rutgers, The State University of New Jersey Dept. of Chemistry New Brunswick, New Jersey 08903
*
*Author to whom correspondence should be addressed
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Abstract

New proton conducting materials were prepared and characterized for potential applications in humidity sensing at temperatures higher than 100°C by complex impedance or galvanic cell type techniques. Calcium metaphosphate, β-Ca(PO3)2 as a galvanic cell type sensor material yields reproducible signals in the range from 5 to 200 nmm Hg water vapor pressure at 578°C, with short response time(-30 sec). Polycrystalline samples of α-Zr(HPO4)2 and KMO3 P5.8Si2O25, and the gel converted ceramic, 0.10Li2O-0.25P2O5-0.65SiO2 as impedance sensor materials show decreases in impedance with increasing humidity in the range from 9 nmn Hg to 1 atm water vapor pressure at 179*C.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 135: Symposium M – Solid State Ionics I , 1988 , 603
Copyright
Copyright © Materials Research Society 1989

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