期刊
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
卷 36, 期 11, 页码 2849-2853出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.jeurceramsoc.2016.04.024
关键词
Lead-free piezoceramics; Perovskite; Na0.5Bi0.5TiO3
资金
- National Nature Science Foundation of China [51402297, 51302144]
- West Light Foundation of the Chinese Academy of Sciences [A14K001]
- Youth Innovation Promotion Association CAS
The electrical properties and microstructures of (1 - x) Bi1/2Na1/2TiO3-xSrTiO(3) (BNT-ST100x, 0.20 <= x <= 0.30) piezoceramics with different grain size distributions were investigated. The critical region separating the ferroelectric from ergodic relaxor is located around x = 0.26. Strains up to 0.2% could be achieved under a low driving fields (E < 2 kV/mm) in the BNT-ST26 composition resulting in excellent actuating performance of S-max/E-max >1000 pm/V. The electrostrain was largely depended on the grain size and an increment of strain up to similar to 38% can be realized by increasing the grain size from 5 mu m to 13 mu m in the BNT-ST26 samples. The results indicate that the field -induced strain performance of BNT-based incipient piezoelectric ceramics can be tailored via microstructure modifications, an alternative strategy to enhance the electromechanical properties. (C) 2016 Elsevier Ltd. All rights reserved.
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