Microwave dielectric properties of SrLa[Ga1?x(Mg0.5Ti0.5)x]O4 and SrLa[Ga1?x(Zn0.5Ti0.5)x]O4 (x = 0.2-0.8) ceramics |
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Authors: | Han Yan Gu Yi Chen Lei Li Bing Liu Xiang Ming Chen |
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Affiliation: | 1. Laboratory of Dielectric Materials, School of Materials Science & Engineering, Zhejiang University, Hangzhou, China;2. College of Electronic Information and Engineering, Hangzhou Dianzi University, Hangzhou, China |
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Abstract: | SrLaGa1?x(R0.5Ti0.5)x]O4 (R = Mg, Zn) ceramics were prepared by a standard solid state sintering method. The single-phase ceramics with K2NiF4-type layered perovskite structure and I4/mmm space group were obtained, indicating that SrLa(R0.5Ti0.5) and SrLaGaO4 can form the unlimited solid solutions. With increasing x for R = Mg and Zn, εr increases monotonously, the Qf value first increases and then decreases, while τf increases from a negative to a positive value. The optimized microwave dielectric properties were obtained as following: εr = 23.3, Qf = 89 400 GHz, τf = ?0.8 ppm/°C for SrLaGa0.6(Mg0.5Ti0.5)0.4]O4 and εr = 23.3, Qf = 76 200 GHz, τf = 0.2 ppm/°C for SrLaGa0.7(Zn0.5Ti0.5)0.3]O4, indicating that the present solid solution ceramics are the promising candidates as microwave resonator materials for the telecommunication applications. |
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Keywords: | K2NiF4-type structure microwave dielectric properties |
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