Study of Structure and Properties of Bi₄Ti₃O₁₂ Prepared by Mechanochemical Syntheses

Abstract

Bi ₄ Ti ₃ O ₁₂ powder was synthesized from bismuth oxide and titanium oxide. Mixture of oxides was milled in zirconium oxide jar in the planetary ball-mill during 1, 3 and 6 h. Extended time of milling directed to formation of higher amount of titanates perovskite phase. Bi ₄ Ti ₃ O ₁₂ was formed between 1 and 3 h of milling time. The phase formation of Bi ₄ Ti ₃ O ₁₂ , crystal structure and powder particle size were followed by XRD, Raman spectroscopy and SEM analysis. After milling for various times the powders were compacted by pressing and isothermal sintering. Sample milled for 3 h and subsequently sintered at 1000°C for 24 h exhibit a hysteresis loop, confirming that the synthesized material possesses ferroelectric properties. All results affect that the structure Bi ₄ Ti ₃ O ₁₂ is strongly dependent on the milling time.

Keywords:

• Bi₄Ti₃O₁₂
• powder ceramic
• mechanochemical synthesis
• ferroelectric properties

Acknowledgments

This research was financially supported by Serbian Ministry of Science and Environmental Protection through project No.141028B and Action COST 539.