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Low-firing Li4Mg3Ti2O9–CaTiO3 composite ceramics with temperature stable microwave dielectric properties

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Abstract

The nanopowders of Li4Mg3Ti2O9 (LMT, 37 nm) and CaTiO3 (CT, 110 nm) compounds were synthesized through a sol–gel method and calcined at 600 °C, about 450 °C lower than that required by conventional ball-milling method. The (1 − x)LMT-xCT (0.05 ≤ x ≤ 0.2) composite ceramics doped with 4 wt% LiF were prepared for low-temperature co-fired ceramics (LTCC). A near-zero τf value was obtained by adjusting composition x of CT. 4 wt% LiF-doped 0.85LMT-0.15CT ceramics sintered at 850 °C possess optimum microwave dielectric properties: εr = 19.5, Q × f = 25,790 GHz, τf = − 5.8 ppm/°C. Such sample was compatible with Ag electrodes, which indicates the ceramic is a promising material for LTCC application.

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Acknowledgements

This work is supported by the National Natural Science Fundation of China (Grant No. 51572162).

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Authors and Affiliations

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

    Simei Zhai, Peng Liu, Dongdong Liu & Yaqi Chu

  2. School of Foreign Languages, Shaanxi Normal University, Xi’an, 710062, China

    Zhimin Yang

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  1. Simei Zhai
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  2. Peng Liu
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  3. Dongdong Liu
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Correspondence to Peng Liu.

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Zhai, S., Liu, P., Liu, D. et al. Low-firing Li4Mg3Ti2O9–CaTiO3 composite ceramics with temperature stable microwave dielectric properties. J Mater Sci: Mater Electron 30, 20002–20009 (2019). https://doi.org/10.1007/s10854-019-02367-w

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