SiC/SiO2 filler reinforced EP composite with excellent nonlinear conductivity and high breakdown strength

被引：29
作者：
Chi, Q. G. [1 ]
Cui, S. [1 ]
Zhang, T. D. [1 ]
Yang, M. [1 ]
Chen, Q. G. [1 ]
机构：
[1] Harbin Univ Sci & Technol, Sch Elect & Elect Engn, Key Lab Engn Dielect & Its Applicat, Minist Educ, Harbin 150080, Peoples R China
来源：
IEEE TRANSACTIONS ON DIELECTRICS AND ELECTRICAL INSULATION | 2020年 / 27卷 / 02期
关键词：
epoxy resin; core; shell structure; nonlinear conductivity; breakdown strength; NANOCOMPOSITES;
D O I：
10.1109/TDEI.2020.008612
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
In this paper, silicon carbide/silicon dioxide (SiC/SiO2) filler with core/shell structure, as a filler in epoxy resin (EP), is studied. The effect of the thickness of the SiO2 shell is studied as it affects the microstructure and electrical properties of the SiC/SiO2/EP composites at various temperatures. Compared with SiC/EP composites, the SiC/SiO2/EP composites show outstanding electrical properties. The nonlinear coefficient of the 4 nm-SiC/SiO2/EP composites increases from 2.88 (5 wt% SiC/EP) to 3.79, and the breakdown field strength increases 1.23 times. With increasing temperature, the electrical conductivity increases and the threshold field strength decreases. Moreover, as the SiO2 shell thickness increases, the breakdown field strength of the composite increases, and shows a weaker temperature dependence.
引用
收藏
页码：535 / 541
页数：7
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