CaOAl2O3SiO2系统微晶玻璃晶化行为的研究

23120011JOURNALOFWUHANUNIVERSITYOFTECHNOLOGYVol.23No.1Jan.2001CaO2Al2O32SiO2():CaO2Al2O32SiO2,(CaOMgO2SiO2)(2CaOAl2O3SiO2)(NaAlSiO4)DTAXRDSEM,Fe2O3,TiO2,Cr2O3:Fe2O3MgFe2O4,Cr2O3TiO2:CaO2Al2O32SiO2;;;:TQ171.1:2000202221.:,1972,;:(430070).CaO2Al2O32SiO21984,EILENJ.DeGulro[1]Illinois,,,23%,R.Cioffi[2]TiO2,,,,1CaO2Al2O32SiO2,1SiO2Al2O3,,TiO2Cr2O3,14601500,5501SiO2Al2O3CaOMgOR2O#59101966#531712612TAS2100D/MAX-YBX,SX-4022.1(DTA)11:#DTA680820,870920#650790,820870,,:,,,,,##,,2.21DTA2X-;3X-Ray,#(CaOMgO2SiO2),(2CaOAl2O3SiO2),#(2CaOAl2O3SiO2)(NaAlSiO4),,,,,[3],2X-Ray2.32.3.1TiO2TiO2,,,,,,,TiO2,,,,,##3,,,,,,,TangShaoqiu[4],10%,,,TiO24TiO2DTA,TiO2,,,,TiO2,,,,,,,2.3.2Fe2O3,,FeOFe2O3CaO2MgO2Al2O32SiO2,:FeOFe2O3,,Fe2+Fe3+,(Mg(Al,Fe)2O4),,Fe2+,5%Fe3+,32231:CaO2Al2O32SiO2,X2Ray,MgFe2O4(d=2.53,2.96,2.09,1.61)MgAl2O4MgFe2O4,Fe3+Fe3+MgFe2O4,MgFe2O4,4TiO2DTAa-TiO22%;b-TiO24%;c-TiO26%52.3.3Cr2O3Cr2O3,1%,,Cr2O3,7002h,,5,:Cr3+,,,,Ca2+Cr3+,Cr3+,,,,[5]:,:Cr6+Cr3+3e-,Cr5+Cr3+,,XRD3,:a),b),MgFe2O4,c)TiO2Cr2O31DeguireEileenJ,RisbudSubhashH.CrystallizationandPropertiesofGlassesfromIllinoisCoalFlyAsh.J.Mater.Sci.1984,19:176017652CioffiR,AronneA,CatauroMetal.Glass2CeramicfromFlyAshwithAddedMgOandTiO2.J.Eur.Cer.Soc.,1994,14:5175213..:,1994.4TangShaoqiu,LiangZhongjun,ChenGuorong.StudiesoftheCrytallizationofAntimony2ContainingSlagGlass2Ceramic.J.Am.Ceram.Soc.,1992(2):4404435,,.R2O2CaO2Al2O32SiO2.,1996,23(1):154220011ResearchonCrystallizationBehaviorofCaO2Al2O32SiO2SystemGlass2ceramicsFengXiaopingHeFengLiLihuaAbstract:TheCaO2Al2O32SiO2systemglasswasresearched.Usingflyashasmainrawmaterials,theglass2ceramicswasobtainedcontain2ingdioposide,gehleniteandnephelineasthemaincrystallinephases.TheeffectsofFe2O3,TiO2andCr2O3oncrystallizationbehaviorofflyashglasswerestudiedbyDTA,XRDandSEM.TheresultsshowedthatFe2O3wasbeneficialtoformMgFe2O4crystallineagent,soitadvancedtocrystallized.TiO2andCr2O3werebotheffectivecrystallineagents.Keywords:CaO2Al2O32SiO2system;glass2ceramics;crystallineagent;crystallizationbehaviorFengXiaoping:Lect.,DepartmentofMaterialsScienceandEngineering,WUT,Wuhan430070,China.(18)EffectofRetardingAdmixturesonthePermittedExposingTimeofRollercompactedConcreteunderHigherTemperatureHeZhenLiangWenquanAbstract:Resistancecuttingofroller2compactedconcretehavebeenresearchedbyexperiment.Consent2timeforexposedinterfaceofroller2compactedconcreteiscomputed.Retardersunderhightemperatureinfluenceonallowabletimeforexposedinterfaceofroller2compactedconcrete.Keywords:roller2compactedconcrete;highertemperature;retardingadmixtures;interface;timeHeZhen:Ph.D.,SchoolofMaterialScienceandEngineering,WUT,Wuhan430070,China.52231:CaO2Al2O32SiO2