Microstructure and dielectric properties of BST/MZO ceramic composites for tunable microwave applications

被引:0
|
作者
Jiandong Cui
Guixia Dong
Yi Wang
Jun Du
机构
[1] General Research Institute for Nonferrous Metals,Advanced Electronic Materials Institute
来源
Journal of Materials Science: Materials in Electronics | 2009年 / 20卷
关键词
Dielectric Constant; Dielectric Loss; Ceramic Composite; Dielectric Strength; Barium Strontium Titanate;
D O I
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中图分类号
学科分类号
摘要
Ba0.6Sr0.4TiO3/Mg0.9Zn0.1O (BST/MZO) ceramic composites with different MZO contents were prepared by traditional ceramic process. The crystal structure, fracture surface morphology, and dielectric properties were systematically investigated. The results show that the BST/MZO ceramic composites possess diphase structure, dense, and uniform morphology. The composites have relatively low dielectric loss (in the order of 10−3) at microwave frequency. The ceramics all retain substantial tunability (more than 20% at 8 kV/mm DC field) and excellent dielectric strength (more than 19.5 kV/mm). The BST-50 wt% MZO sample has the optimal FOM value (about 256) and should be a better candidate for tunable microwave applications.
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页码:473 / 478
页数:5
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