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Investigations on sintering behavior and microwave dielectric properties of MgNb2O6 ceramics doping with LiF

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Abstract

MgNb2O6 ceramics doping with different amounts of LiF (0–0.4 wt%) were prepared via a solid-state reaction method. The sintering behavior, phase evolution, microstructure, and microwave dielectric properties of the LiF-doped MgNb2O6 ceramics were fully investigated. The results showed that with the increase of LiF from 0 to 0.4 wt%, the sintering temperature of MgNb2O6 ceramic decreased significantly from 1300 to 1100 °C, as the sintering activation energy of the MgNb2O6 ceramic was reduced. A second-phase LiNbO3 was identified when the amount of LiF reached 0.2 wt%, leading to an obvious deterioration to the Qf value of MgNb2O6 ceramic. MgNb2O6 ceramic doped with 0.1 wt% LiF exhibited excellent microwave dielectric properties with εr = 20.7, Qf = 90,300 GHz, and τf = − 71.3 ppm/°C, after sintering at 1175 °C for 4 h.

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Authors and Affiliations

  1. Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai, 200050, China

    Simin Wang, Shaohu Jiang, Haishen Ren, Tianyi Xie, Haiyi Peng, Xiaogang Yao & Huixing Lin

  2. University of Chinese Academy of Sciences, Beijing, 100049, China

    Simin Wang & Haiyi Peng

  3. Shandong Sinocera Functional Material Co., Ltd, Dongying, 257000, China

    Aimin Yang

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  1. Simin Wang
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  2. Aimin Yang
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Correspondence to Xiaogang Yao or Huixing Lin.

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Wang, S., Yang, A., Jiang, S. et al. Investigations on sintering behavior and microwave dielectric properties of MgNb2O6 ceramics doping with LiF. J Mater Sci: Mater Electron 32, 24320–24327 (2021). https://doi.org/10.1007/s10854-021-06901-7

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  • DOI: https://doi.org/10.1007/s10854-021-06901-7

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