CHARACTERIZATION OF BARIUM BISMUTH TITANATE OBTAINED BY MECHANOCHEMICAL SYNTHESIS

Authors
Publication date
1 January 2011
Publisher
The Serbian Ceramic Society Vinča Institute of Nuclear Sciences, University of Belgrade Institute for Multidisciplinary Research, University of Belgrade Institute of Physics, University of Belgrade

Abstract

Barium bismuth titanate, BaBi4Ti4O15 (BBT) was prepared by homogenization and sintering of mixture of stoichiometric quantities of BaTiO3 and Bi4Ti3O12 obtained via mechanochemical synthesis. The reaction mechanism of BaBi4Ti4O15 formation and the characteristics of BBT powders and ceramics were studied using XRD, Raman spectroscopy and SEM. The results confirmed that BaBi4Ti4O15 was formed by tetragonal symmetry. Only 4 Raman modes are clearly observed. Ba2+ ions randomly occupy the Bi sites of a pseudo-perovskite layer and may enter in a bismuth oxide layer. BaBi4Ti4O15 ceramics possess the plate-like structure typical for layered structure materials

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