| 학회 | 한국재료학회 |
| 학술대회 | 2018년 봄 (05/16 ~ 05/18, 삼척 쏠비치 호텔&리조트) |
| 권호 | 24권 1호 |
| 발표분야 | 2. 유전체/압전체의 도전과 미래(Challenges and Future for Dielectrics and Piezoelectrics)-오거나이저: 이순일 교수(창원대) |
| 제목 | Nonstoichiometry and Piezoelectric properties of lead-free ABO3 ceramics |
| 초록 | Piezoelectric materials have applications in various devices such as sensors, actuators and energy harvesters, etc. To date, most of the piezoelectric devices are prepared from lead-based ceramics due to their enhanced performance. However, lead-based ceramics are toxic and face constraints from global legislative agencies. Therefore, numerous research efforts have been employed to synthesize high performance lead-free ceramics for device applications. Nonstoichiometry plays an important role in tailoring the electromechanical properties of piezoelectric materials. This work describes the synthesis and effect of A and B-site nonstoichiometry on structure and electromechanical properties of various lead-free candidate materials, such as (Bi0.5Na0.5+x)TiO3 (BNT), (Bi0.5K0.5+x)TiO3 (BKT), (Na1-x Kx)NbO3–NKN and BiFeO3 (BF) ceramics. The observed results obtained from this work suggest that lattice distortion, morphotrophic phase boundary and poly morphic phase transition play dominant role in enhancing the piezoelectric properties of the studied materials. |
| 저자 | 김명호 |
| 소속 | 창원대 |
| 키워드 | <P>비납계; 압전; 비화학양론; ABO<SUB>3</SUB></P> |
