The Ceramic Humidity Sensors on the Base of MgAL2O4

MgAl2O4-based ceramic humidity sensors meet the requirements for a rectilinear dependence of impedance on humidity values, but they must also have a porous structure which is responsible for condensation of water in pores of different diameters. From a theoretical viewpoint, the initial dispersed st...

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Bibliographic Details
Published in:Key engineering materials 1997-04, Vol.132-136, p.240-243
Main Authors: Zenkov, V.S., Syrotyuk, M.M., Uvarova, I.V., Vynnyk, I.B.
Format: Article
Language:English
Subjects:
Exact sciences and technology
General equipment and techniques
Instruments, apparatus, components and techniques common to several branches of physics and astronomy
Physics
Sensors (chemical, optical, electrical, movement, gas, etc.)
remote sensing
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Summary:MgAl2O4-based ceramic humidity sensors meet the requirements for a rectilinear dependence of impedance on humidity values, but they must also have a porous structure which is responsible for condensation of water in pores of different diameters. From a theoretical viewpoint, the initial dispersed structure, the relative position and relationship of components, and the methods of milling and mixing used affect the micro- and macro-structural parameters. Water vapour adsorption rates on the surfaces of powder compacts were correlated with data on the change in impedance over a wide range of humidity values. On the basis of such studies, it is possible to establish optimum parameters for producing MgAl2O4 humidity sensors. 5 refs.
ISSN:1013-9826
1662-9795
1662-9795
DOI:10.4028/www.scientific.net/KEM.132-136.240