Morphotropic phase boundary and electrical properties in (1-x)Bi0.5Na0.5TiO3-xBi(Zn0.5Ti0.5)O3 lead-free piezoceramics
Morphotropic phase boundary and electrical properties in (1-x)Bi0.5Na0.5TiO3-xBi(Zn0.5Ti0.5)O3 lead-free piezoceramics
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(1-x)Bi0.5Na0.5TiO3-xBi(Zn0.5Ti0.5)O3 无铅压电陶瓷的同形相界和电性能
DOI：
10.1063/1.3431387
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发表时间：
2010-06-01
影响因子：
3.2
通讯作者：
Yang, Bin
中科院分区：
文献类型：
--
作者：
Zhang, Shan-Tao;Yan, Feng;Yang, Bin
制备了（1-x）Bi0.5Na0.5TiO3-xBi（Zn0.5Ti0.5）O3 [（1-x）BNT-xBZT，x=0，0.025，0.0375，0.050和0.075]无铅压电陶瓷，并对其结构和电学性能进行了研究。结果表明，BZT能提高BNT的居里温度。在x=0.0375附近存在一个分离菱面体相和四面体相的准同型相界（MPB）。结果，MPB组合物显示出改善的电性能;饱和极化、剩余极化和矫顽场分别为42.0 μ C/cm（2）、36.5 μ C/cm（2）和3.5 kV/mm，而压电系数、平面机电耦合因子和单极应变分别为92 pC/N、0.22和0.08%。通过与其他BNT基压电陶瓷的比较，讨论了其结构和电学性能。本文的研究结果不仅对BNT基无铅压电陶瓷的研究起到了补充作用，而且为研制新型高居里温度无铅压电陶瓷提供了一种途径。(C)2010年美国物理学会。[doi：10.1063/1.3431387]
(1-x)Bi0.5Na0.5TiO3-xBi(Zn0.5Ti0.5)O-3 [(1-x)BNT-xBZT, x=0, 0.025, 0.0375, 0.050, and 0.075] lead-free piezoceramics were prepared and their structures and electrical properties were investigated. It is found that BZT can increase the Curie temperature of BNT. A morphotropic phase boundary (MPB) separating rhombohedral and tetragonal phases exists near x=0.0375. As the result, the MPB composition shows improved electrical properties; the saturated polarization, remnant polarization, and coercive field are 42.0 mu C/cm(2), 36.5 mu C/cm(2), and 3.5 kV/mm, respectively, while the piezoelectric coefficient, planar electromechanical coupling factor, and unipolar strain are 92 pC/N, 0.22, and 0.08%, respectively. The structures and electrical properties are discussed by comparing with that of other BNT-based piezoceramics. Our results do not only supplement for BNT-based lead-free piezoceramics, but also may provide a way to develop new lead-free piezoceramics with high Curie temperature. (C) 2010 American Institute of Physics. [doi: 10.1063/1.3431387]