| 학회 |
한국재료학회 |
| 학술대회 |
2020년 가을 (11/18 ~ 11/20, 휘닉스 제주 섭지코지) |
| 권호 |
26권 1호 |
| 발표분야 |
A. 전자/반도체 재료 분과 |
| 제목 |
Large electric field–induced strain response under low electric field of lead-free BNT–ST–BA ternary piezoelectric ceramics |
| 초록 |
Bismuth–based lead–free ceramics are some of the most promising candidates for actuator applications due to their large strain response. Despite these large strains, there still remains a problem for its safe transfer to practical applications, for instance, a relatively high operating field required to obtain the large strain properties. In this work, a lead–free Bi1/2Na1/2TiO3–SrTiO3–BiAlO3 (BNT-ST-BA) ternary piezoelectric ceramics has been proposed to enhance the electromechanical strain performance under low driving field. We found the highest Smax/Emax value as 707 pm/V at a relatively low electric field of 3 kV/mm was obtained in 2 mol% BA modified BNT-ST ceramics. It is suggested that the naturally induced nonergodicities in ergodic relaxor are responsible for the excellent strain properties. We believe that the obtained result in this study can be a promising candidate for actuator applications. |
| 저자 |
Hoang Thien Khoi Nguyen, Chang-Heon Lee, Trang An Duong, Sang Sub Lee, Hyoung‒Su Han, Jae Shin Lee
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| 소속 |
울산대 |
| 키워드 |
<P>lead-free; piezoceramics; Actuators; Relaxor; Phase trasition</P>
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| E-Mail |
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