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Dielectric properties of AlN/Mo composite ceramics prepared by spark plasma sintering method at different processing conditions

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Abstract

In this study, the effects of powder mixed method, sintering temperature, and the additive amount of the conductive phase on the dielectric loss tangent and permittivity constant of AlN/Mo composite ceramics were investigated. All the ceramic samples were prepared by spark plasma sintering (SPS). AlN composite ceramics with additional 10 vol% Mo sintered at 1400 °C holding for 5 min exhibit the best dielectric loss tangent, which is greater than 0.23. AlN/Mo ceramics with additional 20 vol% Mo become conductive, with the resistivity of 0.05–0.06 Ω·m. High-energy ball milling is better than magnetic stirring powder mixing method. In addition, the additive Mo and lower sintering temperature lead to a better property with the increase in the electromagnetic wave frequency range of 1 × 103–1 × 106 Hz.

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Acknowledgments

This study was financially supported by the International Cooperation Project between China and Russia (No. 2010DFR50360).

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Authors and Affiliations

  1. School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing, 100083, China

    Peng Gao, Cheng-Chang Jia, Wen-Bin Cao, Cong-Cong Wang, Guo-Liang Xu, Dong Liang & Zhao-Wen Cui

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  1. Peng Gao
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  2. Cheng-Chang Jia
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Correspondence to Cheng-Chang Jia.

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Gao, P., Jia, CC., Cao, WB. et al. Dielectric properties of AlN/Mo composite ceramics prepared by spark plasma sintering method at different processing conditions. Rare Met. 41, 1369–1374 (2022). https://doi.org/10.1007/s12598-015-0486-5

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  • DOI: https://doi.org/10.1007/s12598-015-0486-5

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