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The effect of the additives and sintering temperature on the structure and humidity sensitivity of a spinel ferrite

N. REZLESCU1,* , F. TUDORACHE1, E. REZLESCU1, P. D. POPA1

Affiliation

  1. National Institute of Research and Development for Technical Physics, B-dul D. Mangeron 47, Iasi

Abstract

The humidity-sensitive characteristics of MgZn ferrite as a function of the additive type and sintering temperature are investigated. As dopants are used CaCl2, KCl, LiCl and NaCl. The microstructure is dependent upon the sintering temperature and additive kind. All samples exhibit a significant decrease in the specific resistance in the humidity interval 33% RH – 98%RH. The KCl doped ferrite, characterized by higher porosity, shows a shorter response time (3 – 4 minutes) than that of the CaCl2 doped sample (of about 6 minutes)..

Keywords

Spinel ferrite, Chlorides, Microstructure, Humidity sensitivity, Response time.

Submitted at: Feb. 16, 2008
Accepted at: Aug. 28, 2008

Citation

N. REZLESCU, F. TUDORACHE, E. REZLESCU, P. D. POPA, The effect of the additives and sintering temperature on the structure and humidity sensitivity of a spinel ferrite, Journal of Optoelectronics and Advanced Materials Vol. 10, Iss. 9, pp. 2386-2389 (2008)