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Dielectric Properties and Corona Resistance of Si–Mg–B/EP Nano-composites

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Abstract

In order to meet the increasing requirements of epoxy resin matrix materials for the electrical and electronics industry, this paper presents the design and synthesis of Si–Mg–B oxides using Mg, Si and B organic monomers, and preparation of Si–Mg–B/EP nanocomposites by ultrasonic dispersion and thermal curing. Mainly study the effect of composite oxide introduction on the dielectric properties of epoxy resin composites. With an increase in doping amount, the Si–Mg–B/EP nanocomposites show an increase in dielectric constant under working frequency test conditions; a decrease in dielectric loss followed by an increase, and the lowest value of 0.00238 is obtained at a doping amount of 8 wt%. The volume resistivity initially increases and then decreases, with the maximum value of 5.64 × 1016 Ω cm obtained at a doping amount of 8 wt%. Furthermore, the corona resistance life of Si–Mg–B/EP nanocomposites increases, with a value of 401.8 min obtained at a doping amount of 8 wt%, which is 4.65 times that of pure EP. And the morphology near the breakdown point of corona breakdown was analyzed. These results suggest that Si–Mg–B oxide is effective in improving the dielectric loss and corona resistance of epoxy resin.

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Acknowledgements

This work was financially supported by the Fundamental Research Foundation for Universities of Heilongjiang Province (LGYC2018JC033).

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Fundamental Research Fundation for Universities of Heilongjiang Province (LGYC2018JC033).

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Authors and Affiliations

  1. College of Material Science and Engineering, Harbin University of Science and Technology, Harbin, 150040, People’s Republic of China

    Hao Chen, Yu Zhou, Wei Zhao, Jixiang Song, Ziwei Huang, Xiaoyi Lin & Ling Weng

  2. Institute of Petrochemistry, Heilongjiang Academy of Sciences, Harbin, 150036, People’s Republic of China

    Changwei Liu

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  1. Hao Chen
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Contributions

YZ: authored the manuscript text, HC, WZ, CL et al.: revised the content of the manuscript and provided theoretical guidance, the chart was modified by JS, ZH, XL, and LW. All authors have reviewed the manuscript.

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Correspondence to Hao Chen or Changwei Liu.

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Chen, H., Zhou, Y., Zhao, W. et al. Dielectric Properties and Corona Resistance of Si–Mg–B/EP Nano-composites. J Inorg Organomet Polym 34, 546–556 (2024). https://doi.org/10.1007/s10904-023-02822-6

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