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Development of La3+ Doped CeO2 Thick Film Humidity Sensors

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  • Chunjie Wang
  • Aihua Zhang
  • Hamid Reza Karimi

Abstract

The humidity sensitive characteristics of the sensor fabricated from 10 mol% La2O3 doped CeO2 nanopowders with particle size 17.26 nm synthesized via hydrothermal method were investigated at different frequencies. It was found that the sensor shows high humidity sensitivity, rapid response‐recovery characteristics, and narrow hysteresis loop at 100 Hz in the relative humidity range from 11% to 95%. The impedance of the sensor decreases by about five orders of magnitude as relative humidity increases. The maximum humidity hysteresis is about 6% RH, and the response and recovery time is 12 and 13 s, respectively. These results indicate that the nanosized La2O3 doped CeO2 powder has potential application as high‐performance humidity sensor.

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Handle: RePEc:wly:jnlaaa:v:2014:y:2014:i:1:n:297632
DOI: 10.1155/2014/297632
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