Structure and Dielectric Properties of Na1/2Bi1/2TiO3-BaTiO3 Solid Solutions

被引：12
|
作者：
Dunce, M. [1 ]
Birks, E. [1 ]
Antonova, M. [1 ]
Plaude, A. [1 ]
Ignatans, R. [1 ]
Sternberg, A. [1 ]
机构：
[1] Univ Latvia, Inst Solid State Phys, LV-1063 Riga, Latvia
来源：
FERROELECTRICS | 2013年 / 447卷 / 01期
关键词：
NBT; NBT-BT; solid solution; relaxor; phase diagram; SYSTEM;
D O I：
10.1080/00150193.2013.821382
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Dielectric properties, polarization and x-ray diffraction are studied for (1-x)Na1/2Bi1/2TiO3-xBaTiO(3) solid solutions in a concentration range above the morphotropic phase boundary. It is showed that all the studied compositions have tetragonal structure with maximal tetragonality slightly above the morphotropic phase boundary. Ferroelectric relaxor behavior is observed in a wide concentration range of BaTiO3. Stability of the relaxor state decreases with increasing BaTiO3 concentration, but only for compositions with low Na1/2Bi1/2TiO3 content the normal ferroelectric-paraelectric phase transition, which is characteristic to pure BaTiO3, occurs. Mechanisms, which influence the change of the phase transition character and promote the appearance of the relaxor state, are discussed. The phase diagram of (1-x)Na1/2Bi1/2TiO3-xBaTiO(3) is revised.
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页码：1 / 8
页数：8
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