Large Electrostrictive Strain in (Bi0.5Na0.5)TiO3–BaTiO3–(Sr0.7Bi0.2)TiO3 Solid Solutions
Large Electrostrictive Strain in (Bi0.5Na0.5)TiO3–BaTiO3–(Sr0.7Bi0.2)TiO3 Solid Solutions
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DOI：
10.1111/jace.12712
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发表时间：
2014-03
影响因子：
3.9
通讯作者：
Jing Shi;H. Fan;Xiao Liu;A. Bell
中科院分区：
文献类型：
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作者：
Jing Shi;H. Fan;Xiao Liu;A. Bell
通过固相反应过程制备了弛豫铁电体(0.94−x)(Bi0.5Na0.5)TiO3–0.06BaTiO3−x(Sr0.7Bi0.2□0.1)TiO3(BNT–BT–xSBT)(0≤x≤0.5)，并通过透射电子显微镜和拉曼光谱对其结构进行了表征。 BNT–BT–0.3SBT 具有非常高的电致伸缩应变 S = 0.152%，且具有无磁滞行为，远高于报道的其他铁电体中的 S。 S-P2 曲线完全遵循二次关系，这表明纯电致伸缩效应具有 0.0297 m4/C2 的高电致伸缩系数 (Q11)。甚至，其Q11在从环境温度到180°C的温度范围内都保持在较高水平。 BNT-BT-0.3SBT 的场致大电致伸缩应变归因于铁电纳米域的存在。
Relaxor ferroelectrics (0.94 − x)(Bi0.5Na0.5)TiO3–0.06BaTiO3−x(Sr0.7Bi0.2□0.1)TiO3 (BNT–BT–xSBT) (0 ≤ x ≤ 0.5), were prepared by a solid-state reaction process, and their structures were characterized by the transmission electron microscopy and Raman spectroscopy. The BNT–BT–0.3SBT has a very high electrostrictive strain S = 0.152% with hysteresis-free behavior, much more than the reported S in other ferroelectrics. S–P2 profiles perfectly follow the quadratic relation, which indicates a purely electrostrictive effect with a high electrostrictive coefficient (Q11) of 0.0297 m4/C2. Even, its Q11 keeps at a high level in the temperature range from ambient temperature to 180°C. The field-induced large electrostrictive strain of BNT–BT–0.3SBT was attributed to the existence of ferroelectric nanodomains.