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Sr4−mLamTim−1Ta4−mO12 (m=1, 2, 3): A Novel Series of A4B3O12-Type Microwave Ceramics with a High Q and Low f

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A novel series of single-phase polycrystalline ceramics Sr4−mLamTim−1Ta4−mO12 (m=1, 2, 3) were prepared through the solid-state ceramic route. All of them adopt A4B3O12-type cation-deficient hexagonal perovskite structure. The microwave dielectric properties can be tuned by controlling the composition or the value of m. As m increases, the dielectric constant (r) of the ceramic increases from 30 to 40.1 and the quality factor (Q×f) enhances from 16 050 to 42 130 GHz, and the temperature coefficient of resonant frequency (f) improves from −43 to −8 ppm/°C.
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Document Type: Research Article

Affiliations: State Key Laboratory of Advanced Technology for Materials Synthesis and Processing,Wuhan University of Technology,Wuhan 430070, China

Publication date: 01 July 2010

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