Low-Temperature Sintering of High Permittivity Ca0.8Sr0.2TiO3-Li0.5Sm0.5TiO3 Microwave Dielectric Ceramics with B2O3-CuO Addition

被引：12
|
作者：
Yan, Kang [1 ]
Karaki, Tomoaki [1 ]
Adachi, Masatoshi [1 ]
机构：
[1] Toyama Prefectural Univ, Fac Engn, Dept Intelligent Syst Design Engn, Toyama 9390398, Japan
来源：
JAPANESE JOURNAL OF APPLIED PHYSICS | 2009年 / 48卷 / 09期
关键词：
Copper oxides;
D O I：
10.1143/JJAP.48.09KE01
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
A low-temperature cofired ceramic (LTCC) composition for high-permittivity microwave dielectric ceramics is introduced. A sintering temperature of 900 degrees C for 0.19Ca(0.8)Sr(0.2)TiO(3)-0.81Li(0.5)Sm(0.5)TiO(3) (CST-LST) is obtained following the combined addition of B2O3 and CuO. The effects of the total amount and B2O3-CuO proportion of the sintering aids on densification, microstructure, and microwave dielectric properties are investigated. LTCC microwave dielectric ceramics with good dielectric properties (epsilon(r) = 74; Q x f = 2478 GHz; tau(f) = 0.55ppm/degrees C) and (epsilon(r) = 80.4; Q x f = 3010 GHz) are obtained for CST-LST-xwt% [yB(2)O(3)-(1-y)CuO] compositions with x = 7.5, and y = 0.5 at 950 degrees C and with x = 7.5, and y = 0.6 at 900 degrees C. (C) 2009 The Japan Society of Applied Physics
引用
收藏
页码：09KE011 / 09KE015
页数：5
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