Dielectric and tunable characteristics of barium strontium titanate modified with Al2O3 addition

被引：71

作者：

Liang, XF ^{[1
]}

Wu, WB ^{[1
]}

Meng, ZY ^{[1
]}

机构：

[1] Shanghai Univ, Sch Mat Sci & Engn, Shanghai 201800, Peoples R China

来源：

MATERIALS SCIENCE AND ENGINEERING B-SOLID STATE MATERIALS FOR ADVANCED TECHNOLOGY | 2003年 / 99卷 / 1-3期

关键词：

BST; dielectric properties; tunablity; Al2O3; doping;

D O I：

10.1016/S0921-5107(02)00461-0

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The effect of doping Al2O3 on the Ba0.6Sr0.4TiO3 ceramics was investigated. A strong correlation was observed between the average grain size and Al2O3 content. The results indicate that Al3+ behaves as a grain-growth helper below a certain doping level and at the same time lowers the dielectric constant. Both the dielectric loss and tunable properties were modified by the addition of Al2O3. The minimum of the dissipation factor was achieved at Al2O3 doping level up to 0.8 wt.%. The maximum tunability is 30.1% at the doping level of 0.4 wt.% Al2O3, It was explained by a phenomenological equation that was based on Devonshire's theory by the least square method fitting. (C) 2002 Elsevier Science B.V. All rights reserved.

引用

页码：366 / 369

页数：4

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