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Open AccessArticle

Performance of Silicone Rubber Composites Filled with Aluminum Nitride and Alumina Tri-Hydrate

1
Inner Mongolia Electric Power Science & Research Institute, Hohhot 010020, China
2
School of Renewable Energy, North China Electric Power University, Beijing 102206, China
3
State Key Laboratory of Multi-Phase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China
*
Authors to whom correspondence should be addressed.
Materials 2020, 13(11), 2489; https://doi.org/10.3390/ma13112489
Received: 8 May 2020 / Revised: 27 May 2020 / Accepted: 28 May 2020 / Published: 29 May 2020
In this study, silicone rubber (SR) composites were prepared with various amounts of aluminum nitride (AlN) and alumina tri-hydrate (ATH), and vinyl tri-methoxysilane (VTMS) was also introduced to prepare SR/ATH/AlN–VTMS composites for comparison. Compared to the SR/ATH composites, the SR/ATH/AlN composites with higher AlN loading exhibited higher breakdown strength and thermal conductivity, which were further improved by the addition of VTMS. Such results were related to the enhanced rubber–filler interfacial interactions from VTMS coupling, as demonstrated by scanning electron microscopy (SEM) analysis and the curing behaviors of the SR composites. Moreover, by replacing ATH with VTMS-coupled AlN, the SR/ATH/AlN–VTMS composites also exhibited lower dielectric loss along with an increased dielectric constant, suggesting the promising application of VTMS-coupled AlN as a filler for the preparation of the SR composites as high-voltage insulators. View Full-Text
Keywords: silicone rubber; aluminum nitride; alumina tri-hydrate; vinyl tri-methoxysilane; dielectric loss; breakdown strength silicone rubber; aluminum nitride; alumina tri-hydrate; vinyl tri-methoxysilane; dielectric loss; breakdown strength
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Zheng, J.; He, S.; Wang, J.; Fang, W.; Xue, Y.; Xie, L.; Lin, J. Performance of Silicone Rubber Composites Filled with Aluminum Nitride and Alumina Tri-Hydrate. Materials 2020, 13, 2489.

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