Microwave dielectric properties of BaO-TeO2 binary compounds

被引:100
作者
Kwon, Do-Kyun [1 ]
Lanagan, Michael T. [1 ]
Shrout, Thomas R. [1 ]
机构
[1] Penn State Univ, Mat Res Inst, Ctr Dielect Studies, University Pk, PA 16802 USA
基金
美国国家科学基金会;
关键词
D O I
10.1016/j.matlet.2006.07.141
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
A series of BaO-TeO2 binary ceramic compounds were explored for microwave dielectric applications with ultra-low processing temperatures. During the calcination of mixed BaCO3 and TeO2 raw powders, BaTe4O9, BaTe2O6, BaTeO3, and Ba2TeO5 phases were obtained through the sequential phase formations from Te-rich to Ba-rich phases at temperatures ranging from 500 to 850 degrees C. Sintering temperatures were as low as only 550 degrees C for the Te-rich phases. Barium tellurate ceramics exhibited excellent microwave dielectric properties with intermediate dielectric permittivities and high quality factors (Q). The dielectric properties at microwave frequencies were epsilon(r) = 10-21, Q x f = 34,000-55,000 GHz, and TCf = -51 to -124 ppm/degrees C, depending on compositions. (c) 2006 Elsevier B.V. All rights reserved.
引用
收藏
页码:1827 / 1831
页数:5
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