| 학회 |
한국재료학회 |
| 학술대회 |
2021년 봄 (05/12 ~ 05/14, 광주 김대중컨벤션센터) |
| 권호 |
27권 1호 |
| 발표분야 |
A. 전자/반도체 재료 분과 |
| 제목 |
Comparison of Fe-/ and Al-doping effects on phase transition and electrical properties in lead-free Bi0.5Na0.5TiO3–SrTiO3 piezoceramics |
| 초록 |
This study investigated Fe-/ and Al-doping effects on phase transition and electrical properties in lead-free Bi1/2Na1/2TiO3-SrTiO3 (BNT-ST) piezoceramics. Ferroelectric-to-relaxor phase transition was induced by Fe-/or Al-doping that was evidenced by vanishing ferroelectric to relaxor phase transition temperature (TF-R). Interestingly, we found that the values of maximum polarization (Pmax), remanent polarization (Prem), and coercive field (Ec) in polarization curves and negative strain (Sneg) in bi-polar strain curves for Al-doped BNT-ST ceramics were drastically degraded with increasing Al content in comparison to Fe-doped BNT-ST ceramics. Accordingly, it seems that Al-doping more prominently promotes the ferroelectric-to-relaxor phase transition rather than Fe-doping. We suggest that the different phase transition behaviors in BNT-ST ceramics are originated from the different ionic radii between Al3+ and Fe3+ ions. |
| 저자 |
Aisyah Devita Mukhlishah, Hoang Thien Khoi Nguyen, Trang An Duong, Hyoung-Su Han, Jae-Shin Lee
|
| 소속 |
Univ. of Ulsan |
| 키워드 |
<P>lead-free; relaxor; phase transition; ionic radii</P>
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| E-Mail |
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