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High Temperature Humidity Sensing Materials

  • Ping Ping Tsai (a1), Shigeo Tanase (a1) and Martha Greenblatt (a1)

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.

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High Temperature Humidity Sensing Materials

  • Ping Ping Tsai (a1), Shigeo Tanase (a1) and Martha Greenblatt (a1)

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