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Microwave dielectric properties of SrLa[Ga 1− x (Mg 0.5 Ti 0.5 ) x ]O 4 and SrLa[Ga 1− x (Zn 0.5 Ti 0.5 ) x ]O 4 ( x = 0.2‐0.8) ceramics
Author(s) -
Yan Han,
Chen Gu Yi,
Li Lei,
Liu Bing,
Chen Xiang Ming
Publication year - 2019
Publication title -
international journal of applied ceramic technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.4
H-Index - 57
eISSN - 1744-7402
pISSN - 1546-542X
DOI - 10.1111/ijac.13395
Subject(s) - materials science , ceramic , analytical chemistry (journal) , microwave , perovskite (structure) , dielectric , solid solution , sintering , phase (matter) , mineralogy , crystallography , metallurgy , optoelectronics , chemistry , physics , chromatography , quantum mechanics , organic chemistry
Abstract SrLa[Ga 1− x ( R 0.5 Ti 0.5 ) x ]O 4 ( R = Mg, Zn) ceramics were prepared by a standard solid state sintering method. The single‐phase ceramics with K 2 NiF 4 ‐type layered perovskite structure and I 4/mmm space group were obtained, indicating that SrLa( R 0.5 Ti 0.5 ) and SrLaGaO 4 can form the unlimited solid solutions. With increasing x for R = Mg and Zn, ε r increases monotonously, the Qf value first increases and then decreases, while τ f increases from a negative to a positive value. The optimized microwave dielectric properties were obtained as following: ε r = 23.3, Qf = 89 400 GHz, τ f = −0.8 ppm/°C for SrLa[Ga 0.6 (Mg 0.5 Ti 0.5 ) 0.4 ]O 4 and ε r = 23.3, Qf = 76 200 GHz, τ f = 0.2 ppm/°C for SrLa[Ga 0.7 (Zn 0.5 Ti 0.5 ) 0.3 ]O 4 , indicating that the present solid solution ceramics are the promising candidates as microwave resonator materials for the telecommunication applications.