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Microwave dielectric properties of (1 − x)(Mg0.4Zn0.6)2SiO4–xCaTiO3 composite ceramics

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Abstract

Phase formation, microstructure and microwave dielectric properties of (1 − x)(Mg0.4Zn0.6)2SiO4–xCaTiO3 (MZS-C) composite ceramics synthesized by using the conventional solid-state method were systematically investigated. Three phase structure was observed in all samples by using X-ray diffraction and the back scattering electron images. Mg2SiO4 can form a solid solution with Zn2SiO4, which improved sinterability of the MZS-C composite ceramics. As the CaTiO3 content was increased from 0.06 to 0.14, dielectric constant ε r and temperature coefficient of resonant frequency τ f values of the MZS-C ceramics sintered at 1,180 °C for 4 h increased from 6.74 to 8.35 and −41.5 to −6.46 ppm/°C, respectively. Zero τ f value can be obtained by properly adjusting the x value of the (1 − x)MZS–xC ceramics. With increasing content of CaTiO3, densification temperatures of the composite ceramics were decreased. The composite ceramic with x = 0.14 sintered at 1,180 °C for 4 h exhibited excellent microwave dielectric properties of ε r = 8.35, Q × f = 28,125 GHz and τ f = −6.46 ppm/°C.

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Acknowledgments

This research was supported by the National Key Fundamental Research Program (No. 2009CB623302). The authors are thankful to Mr. Bian Jianjiang (Shanghai University) for his experimental help and Agilent Corporation for the measure of microwave dielectric properties.

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Authors and Affiliations

  1. Functional Materials Research Laboratory, Tongji University, No. 4800 Caoan Road, Shanghai, 201804, China

    Wei Wang, Linjiang Tang, Wangfeng Bai, Bo Shen & Jiwei Zhai

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  1. Wei Wang
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  2. Linjiang Tang
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  3. Wangfeng Bai
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  4. Bo Shen
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  5. Jiwei Zhai
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Correspondence to Bo Shen or Jiwei Zhai.

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Wang, W., Tang, L., Bai, W. et al. Microwave dielectric properties of (1 − x)(Mg0.4Zn0.6)2SiO4–xCaTiO3 composite ceramics. J Mater Sci: Mater Electron 25, 3601–3607 (2014). https://doi.org/10.1007/s10854-014-2062-4

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  • DOI: https://doi.org/10.1007/s10854-014-2062-4

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