Large Strain Response and Fatigue-Resistant Behavior in Ternary Bi^sub 0.5^Na^sub 0.5^TiO^sub 3^-BaTiO^sub 3^-Bi(Zn^sub 0.5^Ti^sub 0.5^)O^sub 3^ Solid Solutions

• Published in: Journal of the American Ceramic Society 2014-11, Vol.97 (11), p.3615
• Main Authors: Li, Yan, Wang, Feifei, Ye, Xiang, Xie, Yiqun, Tang, Yanxue, Sun, Dazhi, Shi, Wangzhou, Zhao, Xiangyong, Luo, Haosu
• Format: Article
• Language: English
• Subjects: Ceramics; Dielectric properties; Electric fields; Ferroelectrics; Phase transitions; Temperature effects
• ISSN: 0002-7820; 1551-2916

A ternary solid solution (1 - x)(...)-xBi(...)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(...)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. (ProQuest: ... denotes formulae/symbols omitted.)