BiFeO3 with perovskite structure is a well-known material that has both ferroelectric and antiferromagnetic properties called multiferroics. However, leaky electrical properties and difficulty of controlling stoichiometry due to Bi volatility and difficulty of obtaining high relative density due to high dependency on the ceramic process are issues for BiFeO3 applications. In this work we investigated the sintering behavior of samples with different stoichiometries and sintering conditions. To understand the optimum sintering conditions, nonstoichiometric Bi1±xFeO3±δ ceramics and Ti-doped Bi1.03Fe1-4x/3TixO3 ceramics were synthesized by a conventional solid-state route. Dense single phase BiFeO3 ceramics were successfully fabricated using a two-step sintering and quenching process. The effects of Bi volatility on microstructure were determined by Bi-excess and Ti doping. Bi-excess increased grain size, and Ti doping increased sintering temperature and decreased grain size. It should be noted that Ti-doping suppressed Bi volatility and stabilized the BiFeO3 phase.

Abstract
1. 서 론
2. 실험 방법
3. 결과 및 고찰
4. 결 론
References

• 배지희(창원대학교 신소재공학부) | Jihee Bae (School of Materials Science and Engineering, Changwon National University)
• 김준찬(창원대학교 신소재공학부) | Jun Chan Kim (School of Materials Science and Engineering, Changwon National University)
• 김명호(창원대학교 신소재공학부) | Myong-Ho Kim (School of Materials Science and Engineering, Changwon National University)
• 이순일(창원대학교 신소재공학부) | Soonil Lee (School of Materials Science and Engineering, Changwon National University) Corresponding author