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- Title
Improved electrical, thermal, and mechanical properties of silicone rubber-based composite dielectrics by introducing one-dimensional SiC fillers.
- Authors
Chi, Qingguo; Fang, Hao; Meng, Zhaotong; Zhang, Changhai; Li, Zhonghua; Tang, Chao; Zhang, Tiandong
- Abstract
In this paper, two kinds of one-dimensional (1D) silicon carbide (SiC) fillers, including silicon carbide whiskers (SiCw) and silicon carbide nanowires (SiCn) were filled into silicone rubber (SiR), respectively. The effect of 1D-SiC fillers on the microstructure and electrical, thermal, and mechanical properties of the SiCw/SiR and SiCn/SiR composite dielectrics have been systematically studied. The results show that the SiCn/SiR composites exhibit excellent nonlinear conductivity and thermal properties as compared to the SiCw/SiR composites due to the relatively large length−diameter of SiCn, with a maximum nonlinear coefficient and thermal conductivity of 0.69 and 0.229 W/(m·K), respectively and stronger mechanical property. However, the DC breakdown strength degrades seriously with the increase in the 1D-SiC filler content. The measuring temperature also has a significant effect on the DC conductivity and DC breakdown strength properties of the SiR-based composite dielectric. Besides, the internal electric field of the cable accessories was simulated using COMSOL Multiphysics software and the results verify that the use of both SiC/SiR-based composite dielectrics as reinforced insulation significantly homogenized the internal electric field of the cable attachment as compared to SiR, with a reduction of up to 96.75% in the electric field at the root of the stress cone under steady-state conditions.
- Subjects
DIELECTRICS; CRYSTAL whiskers; SILICON nanowires; THERMAL conductivity; ELECTRIC cables; ELECTRIC insulators &; insulation; NANOWIRES
- Publication
Journal of Materials Science: Materials in Electronics, 2022, Vol 33, Issue 27, p21336
- ISSN
0957-4522
- Publication type
Article
- DOI
10.1007/s10854-022-08928-w