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①11222211．4100822．2504033。351h。。SEM2#H3PO4+Na2HPO4·12H2O50℃900℃37%。TM242A0253－6099201203－0111－04StudyonOxidationResistanceofNaturalGraphiteElectrodeImpregnatedwithPhosphateSolutionHECheng-lin1XIAJin-tong1ZHAOJing-li2ZHAOQing-cai2LIYun-zhu2LIUFeng-lai2AIXiao-long11．CollegeofMaterialScineceandEngineeringHunanUniversityChangsha410082HunanChina2．JinanAohaiCarbonProductsCoLtdPingyin250403ShandongChinaAbstractThreenaturalgraphitesampleswithelectrodesbeingimpregnatedwiththreedifferentphosphatesolutionsrespectivelyundernormalpressureandatroomtemperaturewereburnedforanhouratfivetemperaturepoints．Theirratesofoxidationmasslossweredeterminedtofindoutthephosphateimpregnantwiththebestoxidationresistance．Moreovertheeffectsofthevariationofimpregnantconcentrationontheoxidationresistanceofthesampleswereinvesti-gatedbychangingtheamountofphosphate．Themorphologiesandoxidationresistanceoftheimpregnatedandunimpreg-natedsampleswereobservedbySEMandthermalanalysis．Theresultsshowedthattheinitialmasslosstemperatureofthesamplesimpregnatedwith2#H3PO4+Na2HPO4·12H2Owere50℃higherandtheweightlossrateat900℃was37%lowerthanthoseoftheunimpregnatedsamples．Keywordsnaturalgraphiteelectrodephosphatesolutionimpregnationoxidationresistance。120%～25%8%～10%1173K12%。Manocha2SiOCC/C1000～1600℃。3SiC1400℃200h。4SiC/SiC/C/C1600℃168h。Zhang5Al2O3/SiO2≥1100℃。AliSabend6MgAl2O4。。。①2011-12-181986－。1955－。323201206MININGANDMETALLURGICALENGINEERINGVol．32№3June2012。3。11．1H3PO4AR1．69g/mL20℃≥85%85%Na2HPO4·12H2OAR≥99%AlPO4CP98%AR0．790g/mL20℃≥99．7%。1。1/mL/mol1#H3PO4—100—2#H3PO4Na2HPO4·12H2O1000．013#H3PO4AlPO41000．014#H3PO4AlPO4。。1．2。Φ15mm×15mm10min。2h5h。～100℃20min100℃2h。1．3500600700800900℃5。①100℃30min10min。②。③500℃1h10min。600700800900℃。7ω=mA－mBmA－m×100%ω%mgmAgmBg。1．4Quanta200。1．5-PCT－2A-。10℃/min50mg±250μV0．06mL。22．12．1．111。114#500℃7%。500℃4#500～600℃10%42%600～800℃900℃68.4%。500～900℃900℃50%4#18．4。2#900℃46.7%1#211323#。2．1．212#3#。100mL0．01mol0．015mol0．02mol。2～3。22#33#23。。2500～700℃700～900℃800℃8．5%10．2%。32800～900℃。1～3H3PO4+Na2HPO4·12H2O。2．213SEM4。4#4d。4a～c。。4SEMa1#b2#c3#d4#2．332#H3PO4+Na2HPO4·12H2O4#5。5a4#600℃600～900℃900℃71．55%788℃。5b2#650℃3113650℃728℃728℃17%900℃35%。5a。2#H3PO4+Na2HPO4·12H2O4#50℃4#900℃4#37%。。54#2#a4#b2#P4O10P4O10Na2HPO4·12H2ONa2O。3132#H3PO4+Na2HPO4·12H2O。3。2。32#H3PO4+Na2HPO4·12H2O50℃900℃37%。1．/J．19992166－168．2ManochaLMManochaSKetanBPateletal．OxidationbehaviourofCarbon/CarbonCompositesimpregnatedwithsilicaandsiliconoxy-carbideJ．Carbon2000381481－1491．3．HTR－10J．1998312－15．4．C/CJ．1996516－18．5ZhangSLeeWE．Improvingthewater-wettabilityandoxidationre-sistanceofgraphiteusingAl2O3/SiO2sol-gelcoatingsJ．JournaloftheEuropeanCeramicSociety20032381215－1221．6AliSaberiFarhadGolestaniFardHoseinSarpoolaky．DevelopmentofMgAl2O4spinelcoatingongraphitesurfacetoimproveitswater－wet-tabilityandoxidationresistanceJ．Ceramicsinternational2009351457－461．7．J．201029110－13．8．J．200625641－44．41132