Phase transitions and dielectric properties in Bi(Zn1/2Ti1/2)O3-BaTiO3 perovskite solid solutions
Phase transitions and dielectric properties in Bi(Zn1/2Ti1/2)O3-BaTiO3 perovskite solid solutions
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DOI：
10.1063/1.2960469
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发表时间：
2008-07-15
影响因子：
3.2
通讯作者：
Cann, David P.
中科院分区：
文献类型：
--
作者：
Huang, Chien-Chih;Cann, David P.
采用固相法制备了（1-x）Bi（Zn 1/2 Ti 1/2）O3-xBaTiO（3）多晶陶瓷。发现钙钛矿结构对于包含x=0.66或更大的组合物是稳定的。基于X射线衍射数据，在x接近0.9时观察到四方体和菱方体钙钛矿相之间的准同型相边界。对于富含BaTiO_3的成分，钙钛矿相的对称性为四面体，但随着Bi（Zn_（1/2）Ti_（1/2））O_3含量的增加，出现了菱方体相。介电特性表明，随着Bi（Zn 1/2 Ti 1/2）O-3含量的增加，转变温度降低，转变峰变得非常弥散。与其他Bi（Zn_（1/2）Ti_（1/2））O_（3-）基固溶体的介电行为的比较也进行了讨论。(c)2008年美国物理学会。
(1-x)Bi(Zn1/2Ti1/2)O-3-xBaTiO(3) polycrystalline ceramics were obtained via solid state processing techniques. The perovskite structure was found to be stable for compositions containing x=0.66 or greater. Based on x-ray diffraction data, a morphotropic phase boundary between tetragonal and rhombohedral perovskite phases was observed at x approximate to 0.9. For compositions rich in BaTiO3, the symmetry of the perovskite phase was tetragonal but with increased Bi(Zn1/2Ti1/2)O-3 content, the rhombohedral phase appeared. Dielectric characterization revealed that as Bi(Zn1/2Ti1/2)O-3 content increased, the transition temperature decreased and the transition peak became very diffused. A comparison of the dielectric behavior with other Bi(Zn1/2Ti1/2)O-3-based solid solutions is also discussed. (c) 2008 American Institute of Physics.