填料种类对炭石墨材料性能和微观结构的影响

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1、第25卷第4期新型炭材料Vo1．25No．42010年8月NEWCARB0NMATERIALSAug．2010ArticleID：1007—8827(2010)0443313—04Influenceoffillertypeontheperformanceandmicrostructureofacarbon／graphitematerialLIUZhan-jun一，GUOQuan—gui，LIULang，SHIJing—liZHAIGeng—tai(1．KeyLaboratoryofCarbonMaterials，InstituteofCoalcem，ChineseAcademyofS

2、ciences，Taiynan，Shanxi030001，China；2．GraduateUniversityoftheChineseAcademyofSciences，Beijing100049，China)Abstract：Carbon／graphitematerialwaspreparedbysubjectingamixtureofcoal—tarpitchbinderandarelevantfillertouniaxialcompressionat150MPafor10min．followedbycalcinationat1300oCf0r1h，andgraphitizati

3、onat2300℃inaninductionfurnace．Fourfillers，carbonblack(CB)，petroleum—cokepowder，needle—cokepowder，andnaturalgraph—itepowder(NG)。wereused．Theeffectoffillertypeontheperformanceandmicrostructureofthematedalwasinvesti—gated．ResultsrevealthattheCB—basedmaterialhasexcellentflexuralandcompressivestreng

4、th，withthehighestvaluesof88．0and173．2MPa，respectively，butpoorthermalandelectricalconductivity．111ethermalconductivityoftheNG—basedmaterialhasthehighestvalueof278W／m·K．buttheflexuralandcompressivestrengtharelimitedto51．1and90．2MPa．respectively．MicrostructuralanalysisshowedthattheNG—basedmaterial

5、hasthelargestcrystallitesize，aswellasthemostperfectorientationofgraphitelayers．Keywords：Carbon／graphite；Mechanicalstrength；Porosity；MicrostructureCLCnumber：TB332Documentcode：A1IntroductionstructureofthematerialswerealsodiscussedModerntechnologydevelopmentsputforwardin—2ExperimentaltOdifferentre

6、quirementsforcarbon／graphitematerials2．1Rawmaterialsandtheirmixingprocedureinviewoftheirspecialapplications．IthasbeenwellTherawmaterialsconsistedofcommerciallyknownthattheprecursortypes，suchascarbonblackavailablefillersofCB，PC，NC，andNG，andbinder(CB)，petroleum—cokepowder(PC)，needle—cokeofcoal—ta

7、rpitch(softeningpoint，80℃；carbonpowder(NC)，andnaturalgraphitesphere(NG)，playanimportantroleintheelectrochemicalproper—yield．49．6％bymassfraction)．ThemeanparticleofsizeCB，PC，NC，andNGwas0．05，42，52，tiesofcarbon／graphitematerials，inclu