Microstructural evolution and macroscopic property relationship in antiferroelectric lead lanthanum stannate zirconate titanate ceramics

被引:24
作者
Chan, WH [1 ]
Xu, Z [1 ]
Zhang, Y [1 ]
Hung, TF [1 ]
Chen, HD [1 ]
机构
[1] City Univ Hong Kong, Dept Phys & Mat Sci, Kowloon, Hong Kong, Peoples R China
关键词
D O I
10.1063/1.1604457
中图分类号
O59 [应用物理学];
学科分类号
摘要
The antiferroelectric (AFE) Pb0.97La0.02(Zr0.60Sn0.30Ti0.10)O-3 ceramic has a composition near the morphotropic phase boundary that separates the AFE from the ferroelectric (FE) phase. Its structural changes as well as macroscopic properties were investigated over a temperature range of -180-300 degreesC using transmission electron microscopy, dielectric spectroscopy, and Sawyer-Tower polarization measurements. The previously reported tetragonal AFE phase is shown to be an incommensurate orthorhombic phase and it exhibits a sequence of phase transformations on heating from the incommensurate AFE to a multicell cubic, then to a simple cubic phase. This microstructural evolution with temperature is consistent with the corresponding macroscopic dielectric and AFE behaviors. The temperature dependence of the AFE-FE switching field is closely associated with the corresponding temperature dependence of the incommensurate modulation wavelength. (C) 2003 American Institute of Physics.
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页码:4563 / 4565
页数:3
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