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©1994-2010ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.(,621010):SiO2-BaO-Fe2O3,BaFe12O19,XRDSEMVSM:,700/5h+850/10hBaSiO3,BaFe12O19,1.0m,248.89Am2/kg,142.44kA/m:;BaFe12O19;;:TQ171.73+3:A:1000-2871(2006)02-0015-04PreparationandMagneticPropertiesofGlass-CeramicsinSiO2-BaO-Fe2O3SystemXIAOXiang-qi,LUZhong-yuan(SchoolofMaterialsScience&Enginering,SouthwestUniversityofScienceandTechnology,Mianyang,621010,China)Abstract:Ba-ferrite(BaFe12O19)containingglass-ceramicshavebeenpreparedfromtheglassinSiO2-BaO-Fe2O3throughanovel2stepcrystallizationprocedureinordertomanufacturethemagneticmemorydiskwithoutdeformation.BymeansofDTA,XRD,SEM,VSM,thepropertiesofBa-ferritecontainingglass-ceramicsinSiO2-BaO-Fe2O3wereanalyzed.Theresearchresultsshowthattheglasspreparedby2stepcrystallizationprocedureshowednodeformationduringheat-treatmentandalsoexhibitedbettermagneticpropertiesifcomparedwithconventional1stepcrystallizedglass.Aftercrystallizationat700for5hfollowedby850for10h,thepredominantcrystallinephasesformedwereBaSiO3andBaFe12O19.Theglass-ceramicspreparedunderthisheat-treatmentscheduleshowedasaturationmagnetizationof248.89Am2/kgandacoercivityof142.44kA/m.Keywords:glass-ceramics;BaFe12O19;magneticproperties;heat-treatment34220064GLASS&ENAMELVol.34No.2Apr.2006333333:2005-06-20:(1978-),,,,:0816-2419245;E-mail:xxqxiao@163.com:-(NSAF)(10376030)©1994-2010ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.(BaFe12O19),,[1,2,3],,BaFe12O19[4],(),,,,SiO2-BaO-Fe2O3,BaFe12O19,11.1(mol%):40SiO2,40BaO,20Fe2O3,,1500,3h,6001h,X(XRD:D/MaxRint2000,Rigaku,Japan),1.2DTANetzschSTA429,-Al2O3,20010/min,1200MDI/JADE5X(CuK)X,JSM-6700F,,2%HF120sJDM-14(VSM)sHc,800kA/m,26212.11(),;,[5,6]1,590,Tg,830845,X,830BaSiO3,845BaFe12O192.2612006©1994-2010ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.(vs)800/5hA1BaSiO3(vs),Ba5Fe14O26(s)825/5hA2BaSiO3(vs),Ba5Fe14O26(s),BaFe12O19(w)850/5hA3BaSiO3(vs),Ba5Fe14O26(s),BaFe12O19(w)875/5hA4BaSiO3(vs),Ba5Fe14O26(s),BaFe12O19(m)900/5hA5BaSiO3(vs),Ba5Fe14O26(s),BaFe12O19(m)700/5h+800/5hB1BaSiO3(vs),Ba2FeSi2O7(s),BaFe12O19(w)700/5h+825/5hB2BaSiO3(vs),Ba2FeSi2O7(w),BaFe12O19(m)700/5h+850/5hB3BaSiO3(vs),BaFe12O19(s)700/5h+875/5hB4BaSiO3(vs),BaFe12O19(m)700/5h+900/5hB5BaSiO3(vs),BaFe12O19(m)3vs:verystrong,s:strong,m:medium:w:weak1,A0,BaSiO3,,BaSiO3,,BaFe12O19,850,850BaFe12O19,845BaFe12O19,,BaFe12O19850:(B1B5),BaFe12O19;(A1A5),BaFe12O19,Ba5Fe14O26:,700Ba2FeSi2O7,Ba2FeSi2O7,BaFe12O198009002.32abA3cB32,850/5hA3,;700/5h+850/5hB3,,Ba2FeSi2O7,Ba2FeSi2O7BaFe12O19,3,,,BaFe12O190.61.0m,2.4JDM-14(VSM)sHc,,700/5h85071342©1994-2010ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.:1.0m,BaFe12O19[7]SEM,BaFe12O191.0m,K.Goto3SiO2-BaO-Fe2O3,BaFe12O19,,700/5h+850/10hBaSiO3,BaFe12O19,1.0m,248.89Am2/kg,142.44kA/m:[1].[M].:,1981.[2]C.K.Lee,R.F.Speyer.MagneticsusceptibilitystudiesofB2O3-BaO-Fe2O3glasses[J].ModernPhysicsLettersB,2002,16(13):485-490.[3]I.Ardelean,M.Toderas,S.Filip.InfluenceofmeltingtemperatureonironionsbehaviorinB2O3-BaO-Fe2O3glassstudiesbymagneticsusceptibility[J].JournalofMagnetismandMagneticMaterials,2004,(272-276):339-341.[4]M.Mirkazemi,V.K.Marghussian,A.Beitollahi.Crystallisationbehaviour,microstructureandmagneticpropertiesofBaO-Fe2O3-B2O3-SiO2[J].CeramicsInternational,2005,31(3):368-374.[5]P.W..[M].:,1988.[6].[M].:,1985.[7]K.Goto,M.Ito,T.Sakuari.GlassformationandcrystallizationofbariumferriteintheNa2O-BaO-Fe2O3-SiO2system[J].JournalofMaterialScience,1994,136(24):1348-1351.812006