Large Strain Response and Fatigue‐Resistant Behavior in Ternary Bi0.5Na0.5TiO3–BaTiO3–Bi(Zn0.5Ti0.5)O3 Solid Solutions |
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| Authors: | Yan Li Feifei Wang Xiang Ye Yiqun Xie Yanxue Tang Dazhi Sun Wangzhou Shi Xiangyong Zhao Haosu Luo |
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| Affiliation: | 1. Key Laboratory of Optoelectronic Material and Device, Department of Physics, Shanghai Normal University, , Shanghai, 200234 China;2. Key Laboratory of Inorganic Functional Material and Device, Shanghai Institute of Ceramics, , Shanghai, 201800 China;3. Centre for Advanced Materials Technology (CAMT), School of Aerospace, Mechanical and Mechatronic Engineering, The University of Sydney, , Sydney, New South Wales, 2006 Australia |
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| Abstract: | 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)O3 was found to shift the phase transition (ferroelectric tetragonal to relaxor pseudocubic phase) to lower temperatures. At a critical composition x of 0.05, large electric‐field‐induced strain response with normalized strain Smax/Emax as 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 106 bipolar cycles. These give the BNBZT system great potential as environmental friendly solid‐state actuator. |
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