Crystal structure and dielectric properties of La(Mg0.5Ti0.5)O3-Ca0.8Sm0.4/3TiO3 solid solution system at microwave frequencies
Crystal structure and dielectric properties of La(Mg0.5Ti0.5)O3-Ca0.8Sm0.4/3TiO3 solid solution system at microwave frequencies
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DOI：
10.1016/j.jallcom.2010.09.048
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发表时间：
2011-01-12
影响因子：
6.2
通讯作者：
Huang, Cheng-Liang
中科院分区：
文献类型：
--
作者：
Chen, Jhih-Yong;Huang, Cheng-Liang
The crystal structure and the dielectric properties of (1 - x)La(Mg0.5Ti0.5)O-3-xCa(0.8)Sm(0.4/3)TiO(3) ceramics have been investigated. Ca0.8Sm0.4/3TiO3 was employed as a tau(f) compensator and was added to La(Mg0.5Ti0.5)O-3 to achieve a temperature-stable material. The formation of (1 - x)La(Mg0.5Ti0.5)O-3-xCa(0.8)Sm(0.4/3)TiO(3) solid solutions were confirmed by the XRD results and the measured lattice parameters for all compositions. The dielectric properties are strongly correlated to the sintering temperature and the compositional ratio of the specimens. Although the epsilon(r) of the specimen could be boosted by increasing the amount of Ca0.8Sm0.4/3TiO3, it would instead render a decrease in the Q x f The tau(f) value is strongly correlated to the compositions and can be controlled by the existing phases. A new microwave dielectric material 0.45La(Mg0.5Ti0.5)O-3-0.55Ca(0.8)Sm(0.4/3)TiO(3), possessing a fine combination of microwave dielectric properties with an epsilon(r) of 47.83, a Q x f of 26,500 GHz (at 6.2 GHz) and a tau(f) of -1.7 ppm/degrees C, is proposed as a very promising candidate material for today's 3G applications. (C) 2010 Elsevier B.V. All rights reserved.
