Journal
SENSORS AND ACTUATORS B-CHEMICAL
Volume 117, Issue 1, Pages 261-265Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.snb.2005.11.053
Keywords
ceramic humidity sensor; electrical properties; impedance
Ask authors/readers for more resources
The response to humidity of ZnCr2O4-K2CrO4 ceramic composites formed by solid-state reaction at elevated temperatures is studied. The fired ceramic body, which proved to be mainly constructed from ZnCr2O4 spinel grains, was porous in structure. Only the material containing 20% K2CrO4 (by weight) in ZnCr2O4 exhibited an exponential behaviour to humidity, which shows about three orders change in the dc resistance over the relative humidity (RH) range between 25 and 90%. The capacitive response to relative humidity with a threshold value of about 50% was also found to be more pronounced for this sample and a change in the magnitude of the impedance at 100 Hz, from 10(5) Omega at 10% RH to 10(3) Omega at 93% RH, at room temperature, is typical. (c) 2005 Elsevier B.V. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available