Large Strain Response and Fatigue-Resistant Behavior in Ternary Bi0.5Na0.5TiO3-BaTiO3-Bi(Zn0.5Ti0.5)O-3 Solid Solutions
Large Strain Response and Fatigue-Resistant Behavior in Ternary Bi0.5Na0.5TiO3-BaTiO3-Bi(Zn0.5Ti0.5)O-3 Solid Solutions
复制标题
三元 Bi0.5Na0.5TiO3-BaTiO3-Bi(Zn0.5Ti0.5)O-3 固溶体的大应变响应和抗疲劳行为
DOI：
10.1111/jace.13176
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发表时间：
2014
影响因子：
3.9
通讯作者：
Luo Haosu
中科院分区：
文献类型：
--
作者：
Li Yan;Wang Feifei;Ye Xiang;Xie Yiqun;Tang Yanxue;Sun Dazhi;Shi Wangzhou;Zhao Xiangyong;Luo Haosu
采用传统的固相反应法设计并制备了（1 −x）（0.88Bi0.5Na0.5TiO3-0.12BaTiO3）-xBi（Zn0.5Ti0.5）O3（BNBZT，BNBZTx）三元固溶体。系统地研究了介电、铁电、压电和疲劳性能的温度和成分依赖性，并提出了一个示意性相图。取代与Bi（Zn0.5Ti0.5）O3被发现转移的相变（铁电四方相弛豫赝立方相），以降低温度。在临界组成x为0.05时，在室温附近4 kV/mm的中等电场下获得了归一化应变Smax/Emax高达526 pm/V的大电场诱导应变响应。该菌株在25°C-120°C的温度范围内表现出良好的温度稳定性。此外，在106次双极循环后，在申报的BNBZT固溶体中观察到优异的抗疲劳性能。这使得BNBZT系统作为环境友好型固态致动器具有巨大的潜力。
A ternary solid solution (1 −x)(0.88Bi0.5Na0.5TiO3–0.12BaTiO3)‐xBi(Zn0.5Ti0.5)O3(BNBZT, BNBZTx) was designed and fabricated using the traditional solid‐state reaction method. The temperature and composition dependence of dielectric, ferroelectric, piezoelectric, and fatigue properties were systematically investigated and a schematic phase diagram was proposed. The substitution with Bi(Zn0.5Ti0.5)O3was found to shift the phase transition (ferroelectric tetragonal to relaxor pseudocubic phase) to lower temperatures. At a critical compositionxof 0.05, large electric‐field‐induced strain response with normalized strainSmax/Emaxas high as 526 pm/V was obtained under a moderate field of 4 kV/mm around room temperature. The strain exhibited good temperature stability within the temperature range of 25°C–120°C. In addition, excellent fatigue‐resistant behavior was observed in the proposed BNBZT solid solution after 106bipolar cycles. These give the BNBZT system great potential as environmental friendly solid‐state actuator.