Effects of zinc substitution on the dielectric properties of Ca5Nb4TiO17 microwave ceramics

被引：3
作者：
Li, Chunchun [1 ,2 ]
Wei, Xiaoyong [1 ,2 ]
Yan, Haixue [3 ]
Reece, Michael J. [3 ]
机构：
[1] Xi An Jiao Tong Univ, Minist Educ, Key Lab, Elect Mat Res Lab, Xian 710049, Shaanxi, Peoples R China
[2] Xi An Jiao Tong Univ, Int Ctr Dielect Res, Xian 710049, Shaanxi, Peoples R China
[3] Queen Mary Univ London, Sch Engn & Mat Sci, London E1 4NS, England
来源：
JOURNAL OF ADVANCED DIELECTRICS | 2013年 / 3卷 / 04期
基金：
对外科技合作项目（国际科技项目）;
关键词：
Ceramics; dielectrics; perovskite-like structure; microwave properties;
D O I：
10.1142/S2010135X13200038
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
Ca5-xZnxNb4TiO17 ceramics with 0 <= x <= 0.4 were prepared through a solid-state reaction method. Effects of zinc substitution on sintering behavior and microwave dielectric properties of Ca5Nb4TiO17 ceramics were investigated. The sintering temperature was significantly lowered from 1480 degrees C for pure Ca5Nb4TiO17 to 1260 degrees C for x = 0.4. The microwave dielectric properties are strongly correlated with the composition. It is worth noting that the temperature coefficient of resonant frequency (T-f) displays a tendency toward positive value, ranging from -126.4 ppm/degrees C to -8.6 ppm/degrees C. A temperature stable microwave ceramic with dielectric constant of 52 and Q x f value of 9937 GHz is achieved at x = 0.4 and is a potential candidate for application as cores in dielectrically loaded antennas.
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页数：5
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