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A MODEL OF HUMIDITY SENSOR WITH A Mg-BASED FERRITE

N. Rezlescu1, E. Rezlescu1,* , P. D. Popa1, F. Tudorache1

Affiliation

  1. Technical Physic Institute, D. Mangeron ave. 47, 700050 Iasi, Romania

Abstract

The microstructure and the humidity sensitivity of MgFe2O4 + CaO, Mg0,5Cu0,5Fe1,8Ga0,2O4, Mg0.5Zn0.5Fe2O4 + KCl and MgMn0.2Fe1.8O4 ferrites were investigated. We have found that the humidity sensitivity largely depends on composition, crystallite size, surface area and porosity. The best results concerning humidity sensitivity were obtained for MgMn0.2Fe1.8O4 ferrite. The Mn ions enhance the humidity sensitivity of the Mg ferrite and assure a fine granulation of ferrite..

Keywords

Humidity sensor, MgZn ferrite.

Submitted at: June 7, 2004
Accepted at: March 23, 2005

Citation

N. Rezlescu, E. Rezlescu, P. D. Popa, F. Tudorache, A MODEL OF HUMIDITY SENSOR WITH A Mg-BASED FERRITE, Journal of Optoelectronics and Advanced Materials Vol. 7, Iss. 2, pp. 907-910 (2005)