TITLE:
Microstructure and Dielectric Properties of Bi Substituted PLZMST Ceramics
AUTHORS:
Hayet Menasra, Zelikha Necira, Karima Bouneb, Abdelhak Maklid, Ahmed Boutarfaia
KEYWORDS:
PLZT Ceramics; Grain Size; Dielectric Properties; Diffusivity (γ)
JOURNAL NAME:
Materials Sciences and Applications,
Vol.4 No.5,
May
21,
2013
ABSTRACT: Bismuth (Bi) and lanthanum (La) doped lead manganese antimoine zirconate titanate (PZMST) ceramic powders have been synthesized by high temperature solid-state reaction method. Preliminary X-ray structural analysis of the compounds shows the formation of tetragonal structure. Scanning electron micrographs (SEM) shows a uniform grain distribution and grain size of the order of ~2.28 μm. Detailed dielectric studies of the Pb0.95(La1-z Biz)0.05[(Zr0.6Ti0.4)0.95(Mn1/3Sb2/3)0.05]O3 samples as a function of the temperature (from 25°C to 450°C) at frequency 1 kHz suggest that the compounds undergo a diffuse phase transition. The transition temperature shifts increase with increasing the Bi ratio. Diffusivity (γ) study of phase transition of these compounds provided its value from 1.59 to 1.78 indicating the degree of the disordering in the system.