High electrostrain with high Curie temperature in BiFeO3-BaTiO3-based ceramics
High electrostrain with high Curie temperature in BiFeO3-BaTiO3-based ceramics
复制标题
BiFeO3-BaTiO3 基陶瓷中的高静电应变和高居里温度
DOI：
10.1016/j.scriptamat.2019.01.028
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发表时间：
2019-04-15
影响因子：
6
通讯作者：
Dong, Xianlin
中科院分区：
文献类型：
--
作者：
Wang, Lei;Liang, Ruihong;Dong, Xianlin
在此，我们报道了在无铅的(1 - x)(0.67BiFeO₃ - 0.33BaTiO₃) - xSr₀.₈La₀.₁□₀.₁TiO₂.₉₅（□代表A位空位）压电陶瓷（x = 0.02）中，具有高居里温度（T - C = 410℃）的高单极电致应变（0.45%）。引入Sr₀.₈La₀.₁□₀.₁TiO₂.₉₅是为了构建弛豫铁电态。所获得的单极应变具有热稳定性，从室温到100℃的变化仅为10%。系统的机电和拉曼光谱测量揭示了从经典铁电相到弛豫铁电相的成分驱动相变以及扭曲的内应力场。这项工作为在高温压电陶瓷中获得高电致应变提供了一种新策略。（C）2019 Acta Materialia Inc. 由Elsevier Ltd.出版。保留所有权利。
Here, we report a high unipolar electrostrain (0.45%) with a high Curie temperature (T-C = 410 degrees C) in lead-free (1-x)(0.67BiFeO(3)-0.33BaTiO(3))-xSr(0.8)La(0.1)square 0.1TiO2.95 (square represents the A-site vacancy) piezoceramics with x = 0.02. Sr0.8La0.1 square 0.1TiO2.95 was introduced to construct a relaxor ferroelectric state. The obtained unipolar strain was thermally stable, and the variation from room temperature to 100 degrees C was only 10%. Systematic electromechanical and Raman spectra measurements revealed a composition driven phase transition from classical ferroelectric to relaxor ferroelectric phases and distorted internal stress field. This work provides a novel strategy to obtain high electrostrain in high temperature piezoceramics. (C) 2019 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.