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20121No．12012ElectricWire＆Cable20122Feb．2012SiO2/LDPE200240。、SiO2/LDPE。。1%wt。2%wt。。TM215．1A1672-6901201201-0038-05FiniteElementSimultionofLDPE/SiO2NanocompositeLANLiWUJian-dongZHENGYuYINYiXIAODeng-mingDepartmentofElectricalEngineeringShanghaiJiaotongUniversityShanghai200240ChinaAbstractInterfacesinnanometricdimensionarethemostprominentfeatureinnanocomposites．Athree-dimen-sionalthree-phasemodelintendedtodescribethecurrentbehaviorsofLDPE/SiO2nanocompositeunderDCvoltagewaspresented．Thepolarizationcurrentanddepolarizationcurrentweresimulatedbyfiniteelementmethodbasedonthismodel．InordertoverifythefeasibilityofthismodelpracticalcurrentinLDPE/SiO2nanocompositesfilledwithdifferentcontentofnanosilicaweremeasuredrespectively．Itisshownthatthetrendsofsimulstedcurrentsandprac-ticalcurrentsarethesimularespeciallyunderlowdopingconcentrationbelow1%wtinthisarticle．Howevertheeurrentdecayrateofsimulatedresultsandexperimentalresultshasalittledifferenceespeciallyunderhighdo-pingconcentrationabove2%wtinthisarticele．Thusthisthree-phasemodelisusefulincalculatingthecurrentbe-haviorofnanocompositemeanwhileitisnotperfectandstillneedstobeimproved．Keywordsnanocompositethree-phasemodelfiniteelementpolarizationcurrentdepolarizationcurrent2011-05-26508770471987－．800200240．0、、、。。。Tuncer1-3、。Ang4。。。Sihvola5。。LewisTJ6-8———。。。SiO2/LDPE。COMSOL。。1。———。SiO21。11．19SiO2SiO2。。———。2SiO2/LDPE2。8。-。。。SiO2。1．2SiO2。。。SiO2SiO2。。SiO2。。。1ε=Aexp－Βx－r21ABxrSiO2。3。31.3·93·20121No．12012ElectricWire＆Cable20122Feb．2012ET。。2σE=αexpβ|E|2αβ。E。SiO22。SiO210。。、。911。。3σECS=αmC+nexpβ|E|－fC+gS3CSm、nmnLDPEfCgS。2Matlab。SiO2。randM-fileCOMSOL。41%wt、7nm。COMSOLAC\DCΔ·ε0εrΔΦ/t+Δ·σΔΦ=04、4SiO2。。。。。。3σ=1/ρv=h/Rx·A5Rx=Ux/Is6σρvRxAhUsIs。。56。。σ1=IS1Ux1h1A1=σ2=IS2Ux2h2A27Is2=Ux2Ux2A2A1h1h2IS1812IS2。4·04·20121No．12012ElectricWire＆Cable20122Feb．2012。10kV/mm3600s3600s。0.5%wt、1%wt2%wt。5。。1%wt2%wt。0.5%wt。1%wt。56。。。0.5%wt1%wt。65SiO2/LDPE。11%wt。22%wt。。1TuncerESerdyukYVGubanskiSM．Dielectricmixtureselec-tricalpropertiesandmodelingJ．IEEETrans．onEDI20029809-813．46·14·20121No．12012ElectricWire＆Cable20122Feb．2012。XLPE5‰10‰。41XLPE。2XLPE。1．J．20052264．2．J．2005633-34．3．J．199915449-50．4．C//“98”檿檿檿檿檿檿檿檿檿檿檿檿檿檿檿檿檿檿檿檿檿檿檿檿檿檿檿檿檿檿檿檿檿檿檿檿檿檿檿檿檿檿檿檿檿檿．1998．12．412TuncerENettelbladBGubanskiSM．Non-debyedielectricre-laxationinbinarydielectricmixtures50-50RandomnessandregularityinmixturetopologyJ．JournalofAppliedPhysics20029284612-4625．3TuncerEGubanskiSMNettelbladB．Dielectricrelaxationindi-electricmixturesApplicationofthefiniteelementmethodanditscomparisonwithdielectricmixtureformulasJ．JournalofAp-pliedPhysics200189128092-8101．4ChenAngZhiYuRuyanGuoetal．Calculationofdielectiricconstantandlossoftwo-phasecompositesJ．Appl．Phys．2003933475-3480．5ShivolaA．ElectromagneticmixingformulasandapplicationsJ．IEEElectromagneticWavesSeries47IEEUK1999．6LewisTJ．NanometricDielectricsJ．IEEETrans．onDEI199415812-825．7RoyMNelsonJKMacCroneRKetal．Polymernanocompos-itedielectrics-TheroleoftheinterfaceJ．IEEETtrans．onDEI2005124629-643．8LewisTJ．InterfacesarethedominantfeatureofdielectricsatthenanometriclevelJ．IEEETrans．onDEI．2004115739-753．9TanakaTMasahiroKozakoNorikazuFuseetal．Proposalofamulti-coremodelforpolymernanocompositedielectricsJ．IEEETrans．onDEI200512699-681．10ChenJiongYinYiLiZheetal．Studyofthepercolationphe-nomenonofhighfieldvolt-amperecharactersticinthecompositeoflow-densitypolyethylene/nano-SiOxC．Proceedingsof2005InternationalSymposiumonElectricalInsulatingMaterialsKita-kyushu2005．11TanakaT．Mulit-coremodelfornanodielectricsasfinestructuresofinteractionzonesC．AnnualReportConferenceonElectricalInsulationandDielectricPhenomena2005檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪殏殏殏殏713-716．《》“-”《》、。。。《》、。《》·64·20121No．12012ElectricWire＆Cable20122Feb．2012