Effectofspacechargeonsurface-breakdownbehaviorofpolytetrafluoroethylene

doi:10.16708/j.cnki.1000-758X.2017.0001

›› 2017, Vol. 37 ›› Issue (2): 28-34.doi: 10.16708/j.cnki.1000-758X.2017.0001

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Effectofspacechargeonsurface-breakdownbehaviorofpolytetrafluoroethylene

WANG Fei-Peng^1，*, ZHANG Tao¹, WEN Gang¹, FAN Fan¹, LI Jian¹, CUI Wan-Zhao²

1StateKeyLaboratoryofPowerTransmissionEquipment&SystemSecurityandNewTechnology,ChongqingUniversity,Chongqing400044,China
2NationalKeyLaboratoryofScienceandTechnologyonSpaceMicrowave,ChinaAcademyofSpaceTechnology(Xi′an),Xi′an710100,China

Received:2016-06-26 Revised:2017-02-28 Published:2017-06-25 Online:2017-03-17

Abstract

Abstract: Owingtothelowconductivity,polytetrafluoroethylene(PTFE)tendstoaccumulatesurface-chargewhichiscausedbyvariousfactors，eg.friction,spacechargecarriers,cosmicrays,etc.Additionally,thedecayofsurface-chargetakeslongtime.Itiscertainlysignificativetoinvestigatetheroleofsurfacechargeoninfluencingthesurface-breakdownbehavior.ThisworkendowsPTFEsamplefilmswithvariablesurface-chargedensitybyneedle-platecorona-chargingelectrodes.NegativeDCsurfacebreakdownvoltagewasthenmeasuredonallsamplesatatmosphericpressureandinvacuum.Experimentalresultsshowthatthesurfacechargedensityistailorablebyneedlevoltages;however,thenegativecoronaaccumulatessurfacechargefasterthanthepositivecorona.ThepositivesurfacechargebenefitstoreducenegativeDCsurfacebreakdownvoltage,whilenegativesurfacechargeslightlyleadstoanoppositeway,ie.enhancingthesurfacebreakdownvoltageforacertainextent.Additionally,theinfluenceofspacechargeonthebreakdownvoltageinvacuumisweakerthanthatatatmosphericpressure.

Key words: surfacespacecharge, polytetrafluoroethylene, atmosphericpressure, vacuum, surfacebreakdown

WANG Fei-Peng, ZHANG Tao, WEN Gang, FAN Fan, LI Jian, CUI Wan-Zhao. Effectofspacechargeonsurface-breakdownbehaviorofpolytetrafluoroethylene[J]. , 2017, 37(2): 28-34.

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Effectofspacechargeonsurface-breakdownbehaviorofpolytetrafluoroethylene

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