논문 상세보기
pp.480-488
The electrocaloric effect can be observed in pyroelectric materials based on conversion between electrical and thermal energy, and can be utilized for the future environment-friendly refrigeration technology. Especially, a strong electrocaloric effect is expected in materials in which field-induced phase transition can be achieved. Emerging fluoritestructure ferroelectrics such as doped hafnia and zirconia, first discovered in 2011, are considered the most promising materials for next-generation semiconductor devices. Besides application of fluorite-structure ferroelectrics for semiconductor devices based on their scalability and CMOS-compatibility, field-induced phase transition has been suggested as another interesting phenomenon for various energy-related applications such as solid-state cooling with electrocaloric effect as well as energy conversion/storage and IR/piezoelectric sensors. Especially, their giant electrocaloric effect is considered promising for solid-state-cooling. However, the electrocaloric effect of fluorite-structure oxides based on field-induced phase transition has not been reviewed to date. In this review, therefore, the electrocaloric effect accompanied by field-induced phase transition in fluorite-structure ferroelectrics is comprehensively reviewed from fundamentals to potential applications.
1. Introduction
2.플루오라이트 구조 강유전체의 ElectrocaloricEffect와 상전이에 관한 기초
3. Pyroelectric Energy Conversion과Electrocaloric Effect를 위한 플루오라이트구조 강유전체의 Intrinsic Advantage
3.1 단열 엔트로피 변화 ΔS의 이론적 크기
3.2 큰 ΔS를 보이는 전계 유도 상전이를 일으킬 수있는 온도범위
4.결 론
References
