La3+ substitution in four-layers Aurivillius phase SrBi4Ti4O15

被引：38

作者：

Hou, RZ ^{[1
]}

Chen, XM ^{[1
]}

机构：

[1] Zhejiang Univ, Dept Mat Sci & Engn, Hangzhou 310027, Peoples R China

来源：

SOLID STATE COMMUNICATIONS | 2004年 / 130卷 / 07期

基金：

中国国家自然科学基金;

关键词：

Aurivillius phase; bismuth-layered compounds; dielectric properties; Curie temperature;

D O I：

10.1016/j.ssc.2004.02.044

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

Ceramics with the nominal composition of SrBi4-xLaxTi4O15 have been prepared within the range of 0 less than or equal to x less than or equal to 1.8, and the dielectric properties are investigated. Single phase SrBi4-xLaxTi4O15 solid solution exists until the secondary phase of La2/3TiO3 appears at x = 1.6. The Curie temperature is 520 degreesC for pure SrBi4Ti4O15, and it shifts to low temperature with increasing x. which is due to the smaller structural distortion Caused by La3+ Substitution. In addition, the dielectric constant anomaly is Suppressed with the substitution. No dielectric relaxation behavior is observed. When x greater than or equal to 1.2, the paraelectric state is attained in the present ceramics. La3+ Substitution effects on the SrBi4Ti4O15 ceramics are also compared with the previous work on Bi4-xLaxTi3O12. (C) 2004 Elsevier Ltd. All rights reserved.

引用

页码：469 / 472

页数：4

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