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Microwave dielectric properties of low-fired (1−x)Mg2SiO4–xCa0.9Sr0.1TiO3 ceramics by using nanopowders from high energy ball milling

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Abstract

Low-fired (1−x)Mg2SiO4–xCa0.9Sr0.1TiO3–4 wt% LiF(0.1 ≤ x ≤ 0.15) composite ceramics were prepared by using nanopowders of Mg2SiO4 and Ca0.9Sr0.1TiO3 derived from high energy ball milling (HEBM). The effects of LiF and Ca0.9Sr0.1TiO3 addition on the sinterability, crystal structure, microstructures and microwave dielectric properties of Mg2SiO4-based ceramics were investigated. The sintering temperature of composite ceramics was effectively reduced due to LiF liquid phase. As the amount of Ca0.9Sr0.1TiO3 increased, the temperature coefficient of resonant frequency (τ f ) of Mg2SiO4 was adjusted to ~0 ppm/ºC. Well-densified 0.86Mg2SiO4–0.14Ca0.9Sr0.1TiO3–4 wt% LiF composite ceramics sintered at 900 °C showed good microwave dielectric properties of ε r  = 10.0, Q × f = 61,000 GHz, and τ f  = −5.96 ppm/ºC. This material is compatible with Ag electrodes and suitable for the low-temperature co-fired ceramics applications.

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Acknowledgements

This work is supported by the National Natural Science Foundation of China (Grant nos. 51272150, 51572162), and the Fundamental Research Funds for the Central Universities (GK201401003).

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Authors and Affiliations

  1. College of Physics and Information Technology, Shaanxi Normal University, Xi’an, 710062, China

    Qinqin Feng, Peng Liu, Zhifen Fu & Liping Zhao

  2. College of Science, Anhui University of Science and Technology, Huainan, 232001, China

    Zhifen Fu

  3. College of Physics and Telecommunications Engineering, Shaanxi University of Technology, Hanzhong, 723001, China

    Peng Liu & Yajie Ren

Authors
  1. Qinqin Feng
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  2. Peng Liu
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  3. Zhifen Fu
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Correspondence to Peng Liu.

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Feng, Q., Liu, P., Fu, Z. et al. Microwave dielectric properties of low-fired (1−x)Mg2SiO4–xCa0.9Sr0.1TiO3 ceramics by using nanopowders from high energy ball milling. J Mater Sci: Mater Electron 28, 15398–15404 (2017). https://doi.org/10.1007/s10854-017-7425-1

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  • DOI: https://doi.org/10.1007/s10854-017-7425-1

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