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Ag‐Loaded WO 3 Ceramic Nanomaterials: Characterization and Moisture Sensing Studies
Author(s) -
Pandey Narendra Kumar,
Tiwari Karunesh,
Roy Akash,
Mishra Aradhana,
Govindan Anil
Publication year - 2012
Publication title -
international journal of applied ceramic technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.4
H-Index - 57
eISSN - 1744-7402
pISSN - 1546-542X
DOI - 10.1111/j.1744-7402.2011.02720.x
Subject(s) - materials science , relative humidity , crystallinity , humidity , composite material , ceramic , pellets , pellet , nanomaterials , hysteresis , nanotechnology , meteorology , physics , quantum mechanics
Pellet samples of 0–4% weight Ag ‐loaded WO 3 prepared through soft chemical route were sintered at 700°C and exposed to humidity. Resistance of the pellets decreased with increase in relative humidity. Sensitivity increased with increase in the % loading of Ag . Four percent Ag ‐loaded WO 3 showed maximum sensitivity of 2.38 MΩ/% RH in 20–90% relative humidity range. This sensing element manifests highest crystallinity as well as maximum void concentration. Hysteresis and repeatability for this sensing element after 6 months are within ±2%. A polynomial fit of the humidification data revealed a strong correlation between resistance and relative humidity.