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Microstructure and humidity sensitive properties of MgFe2O4 ferrite with Sn and Mo substitutions prepared by selfcombustion method

C. DOROFTEI1,2,* , E. REZLESCU2, N. REZLESCU2, P. D. POPA2

Affiliation

  1. Faculty of Physics, Al. I. Cuza University , Carol I Boulevard RO-700506, IasI, Romania
  2. Institute of Technical Physics, Bd. D. Mangeron 47, 700050 Iasi, Romania

Abstract

The study was focused on MgFe2O4 ceramic compound and it was investigated the influence of Sn and Mo ions which partly replaced Fe and Mg on the microstructure and humidity sensitivity of the electrical resistivity. We preferred the Mg based ferrite because: i) it is a slightly porous ceramic and ii) its high resistivity can support large humidity variations (over three orders of magnitude). In addition, the stability of Mg2+ ions avoids the appearance of Fe2+ ions which participate to the conduction process in the ferrite..

Keywords

Humidity sensor, Ferrite, MgFe2O4, Sn, Mo substitution, Self-combustion method.

Submitted at: March 15, 2006
Accepted at: May 18, 2006

Citation

C. DOROFTEI, E. REZLESCU, N. REZLESCU, P. D. POPA, Microstructure and humidity sensitive properties of MgFe2O4 ferrite with Sn and Mo substitutions prepared by selfcombustion method, Journal of Optoelectronics and Advanced Materials Vol. 8, Iss. 3, pp. 1012-1015 (2006)