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Enhanced dielectric and thermal performance by fabricating coalesced network of alumina trihydrate/boron nitride in silicone rubber for electrical insulation

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Abstract

Silicone rubber filled with micron-alumina trihydrate (ATH) is a substantially used composite material for high voltage outdoor insulators. This article investigates the effect of nano-boron nitride (BN) addition on the dielectric, thermal stability and thermal conductivity of solely micron-ATH-filled silicone rubber by fabricating coalesced network of particles. Micron-ATH/nano-BN-filled hybrid silicone rubber composites are fabricated with a ratio of 30/0 wt% (ATH30), 29/1 wt% (ATBN1), 27/3 wt% (ATBN3), 25/5 wt% (ATBN5) and 23/7 wt% (ATBN7) using mechanical mixing and water bath sonication techniques. Results suggest that the hybrid batch of silicone rubber composites (ATBN) possess lower permittivity, dielectric loss, enhanced thermal stability and thermal conductivity relative to ATH30. ATBN1 offers low permittivity and dielectric loss values of 3.64 and 0.0086 at 1000 Hz relative to 3.87 and 0.0224 of ATH30, respectively. As far as thermal properties are concerned, ATBN5 emerges as the most promising candidate for electrical insulation with 31 and 200°C higher temperatures for 10 and 15% mass loss, whilst it has shown 20% higher thermal conductivity than ATH30.

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Authors and Affiliations

  1. School of Mechanical and Manufacturing Engineering, University of New South Wales, Sydney, 2052, Australia

    M Tariq Nazir, Guan H Yeoh & Imrana Kabir

  2. School of Electrical Engineering and Telecommunications, University of New South Wales, Sydney, 2052, Australia

    B Toan Phung

  3. State Key Laboratory of Chemical Resource Engineering, College of Energy, Beijing University of Chemical Technology, Beijing, 100029, People’s Republic of China

    Ghulam Yasin

  4. Institut d’Electronique et des Systèmes (IES), UMR 5214, CNRS, Université de Montpellier, Montpellier, 34095, France

    Shakeel Akram

  5. The State Key Laboratory of Power Transmission Equipment and System Security and New Technology, Chongqing University, Chongqing, 400044, People’s Republic of China

    M Shoaib Bhutta & M Ali Mehmood

  6. School of Materials Science and Engineering, Jiangsu University, Zhenjiang, 212013, People’s Republic of China

    Shahid Hussain

  7. Electric Power Research Institute of Guangdong Power Grid Co. Ltd., Guangzhou, 510080, People’s Republic of China

    Shihu Yu

Authors
  1. M Tariq Nazir
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  2. B Toan Phung
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  3. Guan H Yeoh
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  4. Ghulam Yasin
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  5. Shakeel Akram
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  6. M Shoaib Bhutta
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  7. M Ali Mehmood
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  8. Shahid Hussain
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  9. Shihu Yu
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  10. Imrana Kabir
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Correspondence to M Tariq Nazir.

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Nazir, M.T., Phung, B.T., Yeoh, G.H. et al. Enhanced dielectric and thermal performance by fabricating coalesced network of alumina trihydrate/boron nitride in silicone rubber for electrical insulation. Bull Mater Sci 43, 220 (2020). https://doi.org/10.1007/s12034-020-02201-8

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  • DOI: https://doi.org/10.1007/s12034-020-02201-8

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