Structure and Properties of Barium Bismuth Titanate Prepared by Mechanochemical Synthesis

Abstract

Bi ₄ Ti ₄ O ₁₅ [BBT], a member of Aurivillius bismuth-based layer-structure perovskites, was prepared from stoichiometric amounts of BaTiO ₃ [BT] and Bi ₄ Ti ₃ O ₁₂ [BIT] obtained via mechanochemical synthesis. Mechanochemical synthesis was performed in air atmosphere in a planetary ball mill. BBT ceramics were sintered at 1100°C for 4 h without pre-calcination step within heating rate 10°C/min. The formation of phase and crystal structure of BT, BIT and BBT were approved using X-ray analysis. The morphology of obtained powders and microstructure were exhamined using scanning electron microscopy. The electrical properties of sintered samples were carried out.

Keywords:

• Mechanochemical synthesis
• Aurivillius phase
• BaBi₄Ti₄O₁₅

Acknowledgments

The authors gratefully acknowledge to the financial support of the Serbian Ministry of Science (P 142010 and P 142059) the Brazilian research funding institution FAPESP and COST 539.