DocumentCode :
639674
Title :
Effective modulation of surface conductivity of epoxy resin insulators by direct fluorination
Author :
Yaqiang Liu ; Zhenlian An ; Qianqian Yin ; Feihu Zheng ; Yewen Zhang
Author_Institution :
Dept. of Electr. Eng., Tongji Univ. Shanghai, Shanghai, China
fYear :
2013
fDate :
June 30 2013-July 4 2013
Firstpage :
1072
Lastpage :
1075
Abstract :
Epoxy resin samples were surface fluorinated using a F2/N2 mixture at different temperatures for the same time. ATR-IR analyses indicate substantial changes in surface chemical composition and structure by the fluorinations. SEM observations show an increase of thickness of the fluorinated layer and a change of its surface morphology with fluorination temperature. Conductivity measurements reveal a large increase in surface conductivity and surface potential measurements consistently show a low initial surface potential and rapid potential decay after corona charging, strongly depending on fluorination temperature and environmental humidity. The initial surface potential was found to decrease dramatically above a critical surface conductivity and almost to zero when surface conductivity increased to 10-12 S. Surface polarity of the epoxy sample was found to dramatically increase with fluorination temperature. An increase in degree of chain scission with fluorination temperature is considered to be the main cause for the increases of surface conductivity and surface polarity.
Keywords :
attenuated total reflection; corona; epoxy insulators; fluorine; humidity; nitrogen; scanning electron microscopy; surface conductivity; surface morphology; surface potential; ATR-IR analyses; F2-N2; SEM; attenuated total reflection; chain scission; corona charging; direct surface fluorination; environmental humidity; epoxy resin insulators; fluorination temperature; scanning electron microscopy; surface chemical composition; surface conductivity; surface morphology; surface polarity; surface potential measurement; Absorption; Conductivity; Humidity; Surface charging; Surface morphology; Surface treatment; Temperature measurement; Epoxy resin insulator; fluorination temperature; surface electrical properties; surface fluorination; surface physicochemical characteristics;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Solid Dielectrics (ICSD), 2013 IEEE International Conference on
Conference_Location :
Bologna
ISSN :
2159-1687
Print_ISBN :
978-1-4799-0807-3
Type :
conf
DOI :
10.1109/ICSD.2013.6619675
Filename :
6619675
Link To Document :
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