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- Title
Low electric field-driven giant strain response in 〈001〉 textured BNT-based lead-free piezoelectric materials.
- Authors
Bai, Wangfeng; Chen, Daqin; Zheng, Peng; Zhang, Jingji; Shen, Bo; Zhai, Jiwei; Ji, Zhenguo
- Abstract
The applied electric field to drive intended large strain response in BiNaTiO-based piezoelectric ceramics is usually high (mostly with E ≥ 60 kV/cm) and remains a long-standing drawback for actual actuator applications. In this work, we report 〈001〉 oriented (1− x) (0.83BiNaTiO-0.17BiKTiO)- xBaTiO (BNT-BKT-BT) lead-free piezoelectric ceramics using BT as the template particles to tailor the strain behavior under a low driving field. The strain response exhibited an increasing trend with the increasing grain orientation, and remarkably giant S / E of 800 pm/V was acquired under a relatively low electric field of 45 kV/cm in the optimized microstructure for textured BNT-BKT-1BT ceramics compared with the reported lead-free Bi-based perovskite ceramics. Furthermore, the achieved textured ceramics showed prominent electric field- and temperature-dependent strain characteristic featured by both a high room-temperature S / E of 621 pm/V under a very low driving field of 35 kV/cm and an achievable large S / E of 531 pm/V with almost vanished hysteretic behavior at high temperature. Our work may be helpful for designing BNT-based lead-free materials with promising strain response and thus provides a new approach to resolve this drawback of BNT-based lead-free piezoelectric ceramics.
- Subjects
PIEZOELECTRIC ceramics; ELECTRIC fields; STRAINS &; stresses (Mechanics); BISMUTH compounds; MICROSTRUCTURE
- Publication
Journal of Materials Science, 2017, Vol 52, Issue 6, p3169
- ISSN
0022-2461
- Publication type
Article
- DOI
10.1007/s10853-016-0606-0