Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7898642 | Journal of the European Ceramic Society | 2018 | 8 Pages |
Abstract
Tetragonal phase (1-x)(0.875Bi0.5Na0.5TiO3-0.125BaTiO3)-xBi(Mg0.5Ti0.5)O3 lead-free ferroelectrics were designed and fabricated by a conventional solid state route. All the specimens exhibit a tetragonal perovskite structure, and undergo a phase evolution from ferroelectric P4mm to antiferroelectric relaxor P4bm as the BMT addition increases. The critical composition xâ¯=â¯0.04 makes a bridge between the both tetragonal phases, and gives a large field-induced strain of 0.30% and an adequately-large electrostrictive coefficient Q33 of 0.0254â¯m4/C2. To be highlighted, the field-induce strain of the composition xâ¯=â¯0.04 shows an almost constant value over the temperature range of 18-100â¯Â°C, illustrating a temperature-insensitive behavior, which could be attributed to the widened gap between TR-E and TF-R. The temperature-insensitive large strain of the tetragonal BNT-BT-BMT composition give a promising potential for application in precision position actuators.
Related Topics
Physical Sciences and Engineering
Materials Science
Ceramics and Composites
Authors
Ling Li, Mankang Zhu, Qiumei Wei, Mupeng Zheng, Yudong Hou, Jigong Hao,