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Identification of Humidity Sensing Mechanism in MgAl2O4 by Impedance Spectroscopy as Function of Relative Humidity

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posted on 2018-05-23, 02:53 authored by Guilherme Baltar Crochemore, Amadeu Rodrigues Pereira Ito, Celso Antonio Goulart, Dulcina Pinatti Ferreira de Souza

MgAl2O4 is a humidity sensing material, which high melting point requires high sintering temperatures. In this work, manganese oxide was used as a sintering aid to obtain MgAl2O4 samples sintered at 1350°C with a microstructure suitable for humidity sensing. Impedance spectroscopy analyses were performed at several levels of relative humidity, indicating that this correlation is possible within the range of 10-80% of relative humidity.

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