摘要
The flashover performance of insulating materials plays an important role in the development of high-voltage insulation systems.In this paper,silicone rubber(SIR)is modified by CF4 radio frequency capacitively coupled plasma(CCP)for the improvement of surface insulation performance.The discharge mode and active particles of CCP are diagnosed by the digital single-lens reflex and the spectrometer.Scanning electron microscopy and x-ray photoelectron spectroscopy are used for the surface physicochemical properties of samples,while the surface charge dissipation,charge accumulation measurement,and flashover test are applied for the surface electrical characteristics.Experimental results show that the fluorocarbon groups can be grafted and the surface roughness increases after plasma treatment.Besides,the surface charge dissipation is decelerated and the positive charge accumulation is inhibited obviously for the treated samples.Furthermore,the surface flashover voltage can be increased by 26.67%after 10 min of treatment.It is considered that strong electron affinity of C–F and increased surface roughness can contribute to deepening surface traps,which not only inhibits the development of secondary electron emission avalanche but also alleviates the surface charge accumulation and finally improves the surface flashover voltage of SIR.
作者
Chenxu WANG
Bo ZHANG
Sile CHEN
Yuhao SUN
Xiong YANG
Yanan PENG
Xingyu CHEN
Guanjun ZHANG
王晨旭;张波;陈思乐;孙宇豪;杨雄;彭雅楠;陈星宇;张冠军(State Key Laboratory of Electrical Insulation and Power Equipment,School of Electrical Engineering,Xi'an Jiaotong University,Xi'an 710049,People's Republic of China;School of Electrical and Information Engineering,Anhui University of Technology,Ma'anshan 243032,People's Republic of China)
基金
supported by National Natural Science Foundation of China(Nos.11775175,U1766218,51827809)
Natural Science Research Fund of Higher Education of Anhui Province(No.KJ2020A0246)。
