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© 2021 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.

Abstract

In this paper, in order to improve the electrical and thermal properties of SiC/EP composites, the methods of compounding different crystalline SiC and micro-nano SiC particles are used to optimize them. Under different compound ratios, the thermal conductivity and breakdown voltage parameters of the composite material were investigated. It was found that for the SiC/EP composite materials of different crystal types of SiC, when the ratio of α and β silicon carbide is 1:1, the electrical performance of the composite material is the best, and the breakdown strength can be increased by more than 10% compared with the composite material filled with single crystal particles. For micro-nano compound SiC/EP composites, different total filling amounts of SiC correspond to different optimal ratios of micro/nano particles. At the optimal ratio, the introduction of nanoparticles can increase the breakdown strength of the composite material by more than 10%. Compared with the compound of different crystalline SiC, the advantage is that the introduction of a small amount of nanoparticles can play a strong role in enhancing the break-down field strength. For the filled composite materials, the thermal conductivity mainly depends on whether an effective heat conduction channel can be constructed. Through experiments and finite element simulation calculations, it is found that the filler shape and particle size have a greater impact on the thermal conductivity of the composite material, when the filler shape is rounder, the composite material can more effectively construct the heat conduction channel.

Details

Title
Research on the Compound Optimization Method of the Electrical and Thermal Properties of SiC/EP Composite Insulating Material
Author
Song, Xupeng 1 ; Xue, Xiaofeng 1 ; Wen Qi 1 ; Zhang, Jin 2 ; Zhou, Yang 2 ; Yang, Wei 3 ; Zhang, Yiran 4 ; Shen, Boyang 5   VIAFID ORCID Logo  ; Lin, Jun 1 ; Bian, Xingming 1   VIAFID ORCID Logo 

 State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources, North China Electric Power University, Beijing 102206, China; [email protected] (X.S.); [email protected] (X.X.); [email protected] (W.Q.); [email protected] (J.L.) 
 State Grid Corporation of China, Co., Ltd., Beijing 100031, China; [email protected] (J.Z.); [email protected] (Y.Z.) 
 State Key Laboratory of Advanced Power Transmission Technology, Global Energy Interconnection Research Institute, Co., Ltd., Beijing 102211, China; [email protected] 
 State Grid Hubei Maintenance Company Yichang Operation Maintenance Branch, Yichang 430050, China; [email protected] 
 Electrical Engineering Division, University of Cambridge, Cambridge CB3 0FA, UK; [email protected] 
First page
3369
Publication year
2021
Publication date
2021
Publisher
MDPI AG
e-ISSN
20734360
Source type
Scholarly Journal
Language of publication
English
ProQuest document ID
2581005316
Copyright
© 2021 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.