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Low temperature sintering and microwave dielectric properties of Li6Mg7Ti3O16 ceramics with LiF additive for LTCC applications

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Abstract

Li6Mg7Ti3O16 ceramics were prepared by the conventional solid-state method with 1–5 wt% LiF as the sintering aid. Effects of LiF additions on the phase compositions, sintering characteristics, micro-structures and microwave dielectric properties of Li6Mg7Ti3O16 ceramics were investigated. The LiF addition could effectively lower the sintering temperature of Li6Mg7Ti3O16 ceramics from 1550 to 900 °C. For different LiF-doped compositions, the optimum dielectric permittivity (ε r ) and quality factor (Q·f) values first increased and then decreased with the increase of LiF contents, whereas the temperature coefficient of resonant frequency (τ f ) fluctuated between − 14.39 and − 8.21 ppm/°C. Typically, Li6Mg7Ti3O16 ceramics with 4 wt% LiF sintered at 900 °C exhibited excellent microwave dielectric properties of ε r  = 16.17, Q·f = 80,921 GHz and τ f  = − 8.21 ppm/°C, which are promising materials for the low temperature co-fired ceramics applications.

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Acknowledgements

This work is supported by National Natural Science Foundation (No. 51472108) and Project funded by China Postdoctoral Science Foundation (2017M612341).

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Authors and Affiliations

  1. School of Materials Science and Engineering, University of Jinan, Jinan, 250022, China

    H. L. Pan, M. T. Liu, M. F. Li, F. Ling & H. T. Wu

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  1. H. L. Pan
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  2. M. T. Liu
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  3. M. F. Li
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  4. F. Ling
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  5. H. T. Wu
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Correspondence to H. T. Wu.

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Pan, H.L., Liu, M.T., Li, M.F. et al. Low temperature sintering and microwave dielectric properties of Li6Mg7Ti3O16 ceramics with LiF additive for LTCC applications. J Mater Sci: Mater Electron 29, 999–1003 (2018). https://doi.org/10.1007/s10854-017-7998-8

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  • DOI: https://doi.org/10.1007/s10854-017-7998-8

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