Dielectric relaxor behavior of ZnWO4 content on Ba0.5Sr0.5TiO3 composite ceramics for tunable microwave applications

被引：11

作者：

Zhang, Mingwei ^{[1
]}

Zhai, Jiwei ^{[1
]}

Jiang, Haitao ^{[1
]}

Zhang, Jingji ^{[1
]}

Yao, Xi ^{[1
]}

机构：

[1] Tongji Univ, Funct Mat Res Lab, Shanghai 200092, Peoples R China

来源：

MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE MATERIALS | 2010年 / 172卷 / 03期

关键词：

Tunability; Microwave dielectric properties; Compositional homogeneous; Composite ceramic; THIN-FILMS;

D O I：

10.1016/j.mseb.2010.06.018

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

ZnWO4-doped Ba0.5Sr0.5TiO3 (BST) composite ceramics were prepared by the conversional solid-state route. Their phase compositions and microstructures were systematically characterized. A significant relaxor and diffuse phase transition were observed in the samples doped with 5.0-25.0 wt% ZnWO4. It was found that permittivity peaks of the samples gradually shifted to low temperatures with increasing content of ZnWO4. Meanwhile, tunabilities of the composite ceramics decreased, but their Q values increased gradually. The sample with 35.0 wt% ZnWO4 has an appropriate permittivity of 72 (similar to 3.307 GHz), an acceptable tunability of 12.3% (similar to 10 kHz) and a considerable high Q value of 650 (similar to 3.307 GHz), which makes it a promising candidate for applications in electrically tunable microwave devices. (C) 2010 Elsevier B.V. All rights reserved.

引用

页码：311 / 316

页数：6

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