Microstructure and dielectric properties of BaSr1-xTiO3 ceramics

被引：76

作者：

Fu, CL ^{[1
]}

Yang, CR ^{[1
]}

Chen, HW ^{[1
]}

Wang, YX ^{[1
]}

Hu, LY ^{[1
]}

机构：

[1] Univ Elect Sci & Technol China, Inst Microelect & Solid State Elect, Chengdu 610054, Peoples R China

来源：

MATERIALS SCIENCE AND ENGINEERING B-SOLID STATE MATERIALS FOR ADVANCED TECHNOLOGY | 2005年 / 119卷 / 02期

关键词：

barium strontium titanate; ceramics; lattice constant; curie temperature; hysteresis loop;

D O I：

10.1016/j.mseb.2005.02.056

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The crystalline structure and dielectric properties of BaxSr1-x=TiO3 ceramics with x = 0.45, 0.5, 0.6, 0.65, 0.8, 0.9 were investigated. The a- and c-axis lattice constants of BaxSr1-xTiO3 ceramics were calculated and it is found that the crystal structures are tetragonal phase when x >= 0.65 at room temperature. The Curie-Weiss temperature (T-0) is always lower than Curie temperature (T-C) and the linear relation between the Curie temperature and the stoichiometric percentage of barium can be observed and expressed as T-C (degrees C) = - 195.0 + 322.2x. The values of coercive electric field (E-C) and remanent polarization (P-r) increase as Ba/Sr ratio of BaxSr(1-x)TiO(3) ceramics increases except for x <= 0.5, which are due to the decrease in grain size and the difference between the radius of Ba2+ and that of Sr (2+). (c) 2005 Elsevier B.V. All rights reserved.

引用

页码：185 / 188

页数：4

共 7 条

[1] Oxides ferroelectric (Ba, Sr)TiO3 for microwave devices [J].