CHARACTERIZATION OF BARIUM BISMUTH TITANATE PREPARED BY MECHANICAL ASSISTED SYNTHESIS

Abstract

Barium bismuth titanate (BaBi4Ti4O15 - BBiT) is an n=4 member of the Bi-base-layer- structure ferroelectric oxide family (Aurivillius phase). A lot of aspects of the preparation and properties of BBiTremain unexplored, whereas being promising candidate for high temperature lead free piezoelectric device, memory application and ferroelectric nonvolatile memories (Fe-RAM) [1,2]' Barium-bismuth titanate BBiT was prepared from stoichiometric quantities of BaTi3O12 and Bi4Ti4O12 obtained via mechanically assisted synthesis in planetary ball mill BaTi3O12 has been synthesised from mixture of BaO and TiO2 and Bi4Ti3O12 was prepared starling from Bi2O3 andTiO2, commercially available. Characterization of this powder was carried by TG/DTA method.s and measuring particle size distribution. Sintering curve of powder mixture of BT and BiT is presented on Fig. l. This result is used to determinate appropriate temperature of sintering. The temperature range of sintering is narrow from 1100C to 1140C.