Contribution to the preparation and physico-chemical characterization of lead-based perovskite Pb (Fe1/2Nb1/2) O3

 

M. Zouhairi, El. El ghadraoui, H. Bali, T. Lamcharfi*

Laboratoire de chimie de la matière condensée. FST Fez B.P.2202 Morocco.

* Laboratoire des signaux, systèmes et composants. FST Fez B.P.2202 Morocco.

 Corresponding author. E-mail: zouhir175@hotmail.com

Received: 12 December 2011; revised version accepted: 28 January 2012

 

Abstract

     Preparation of the pure phase PFN by the classical solid state reaction, shows a good homogenization of the starting products. The powder was heat treated at 300°C and then calcined at different temperatures. The pure perovskite phase was obtained at 850°C; the latter is relatively low compared to other temperatures of calcinations of samples synthesized using other chemical processes. Dielectric investigations revealed a non relaxing behavior with a diffuse character. The value of the temperature of the maximum of the permittivity is close to those reported in the literature.

 

Keywords : Ferroelectric; PFN; Dielectric permittivity.


 

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