Surface flashover performance of epoxy resin microcomposites improved by electron beam irradiation

被引：80

作者：

Huang, Yin ^{[1
]}

Min, Daomin ^{[1
]}

Li, Shengtao ^{[1
]}

Li, Zhen ^{[1
]}

Xie, Dongri ^{[1
]}

Wang, Xuan ^{[2
]}

Lin, Shengjun ^{[1
,3
]}

机构：

[1] Xi An Jiao Tong Univ, State Key Lab Elect Insulat & Power Equipment, 28 Xianning West Rd, Xian 710049, Peoples R China

[2] Harbin Univ Sci & Technol, Minist Educ, Key Lab Engn Dielect & Its Applicat, Harbin 150040, Peoples R China

[3] Pinggao Grp Co Ltd, State Grid High Voltage Switchgear Insulat Mat La, Pingdingshan 467001, Peoples R China

来源：

APPLIED SURFACE SCIENCE | 2017年 / 406卷

基金：

中国国家自然科学基金;

关键词：

Electron beam irradiation; Epoxy resin microcomposite; Surface trap; Surface flashover; INSULATORS; VACUUM; CHARGE; PULSE; SEMICONDUCTORS; PARAMETERS; POLYMERS; DYNAMICS; CURRENTS; MICRO;

D O I：

10.1016/j.apsusc.2017.02.093

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The influencing mechanism of electron beam irradiation on surface flashover of epoxy resin/Al2O3 micro composite was investigated. Epoxy resin/Al2O3 microcomposite samples with a diameter of 50 mm and a thickness of 1 mm were prepared. The samples were irradiated by electron beam with energies of 10 and 20 keV and a beam current of 5 mu A for 5 min. Surface potential decay, surface conduction, and surface flashover properties of untreated and irradiated samples were measured. Both the decay rate of surface potential and surface conductivity decrease with an increase in the energy of electron beam. Meanwhile, surface flashover voltage increase. It was found that both the untreated and irradiated samples have two trap centers, which are labeled as shallow and deep traps. The increase in the energy and density of deep surface traps enhance the ability to capture primary emitted electrons. In addition, the decrease in surface conductivity blocks electron emission at the cathode triple junction. Therefore, electron avalanche at the interface between gas and an insulating material would be suppressed, eventually improving surface flashover voltage of epoxy resin microcomposites. (C) 2017 Elsevier B.V. All rights reserved.

引用

页码：39 / 45

页数：7

共 46 条

[1] MECHANISM OF FAST SURFACE FLASHOVER IN VACUUM [J].