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Electric circuit model for MgO-doped ZrO2–TiO2 ceramic humidity sensor

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3 Author(s)
Jain, M.K. ; Thin Film Laboratory, Department of Physics, Indian Institute of Technology Delhi, New Delhi 110016, India ; Bhatnagar, M.C. ; Sharma, G.L.

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The MgO-doped ZrO2–TiO2 ceramic pellets were studied for its humidity-sensitive electrical conduction. An equivalent circuit model has been proposed to define the humidity-sensitive electrical properties. This model is in agreement with the experimental findings. The electrical conduction is largely controlled by the intergranular impedance except at very high humidities. The impedance of the pellets showed inductive behavior in high-humidity region. This behavior can be attributed to the spherical paths adopted by charge carrier because conduction is mainly through the spherical grain surface. © 1998 American Institute of Physics.

Published in:

Applied Physics Letters  (Volume:73 ,  Issue: 26 )