Fe2O3BaOSiO2系磁性微晶玻璃的制备与性能研究

©1994-2010ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.(2006)0220021203Fe2O32BaO2SiO2,(,621010):Fe2O32BaO2SiO2,BaFe12O19,XRDSEMVSM.:,.700/5h+850/10hBaSiO3,BaFe12O19,1m,19.8Am2/kg,Hc1790A/m.:;BaFe12O19;;:TG132.2;TQ171:AInvestigationofmagneticmicrocrystallineglassinFe2O32BaO2SiO2systemXIAOXiang2qi,LUZhong2yuan(CollegeofMaterialsScienceandEngineering,SouthwestUniversityofScienceandTechnology,Mianyang621010,China)Abstract:SelectingFe2O32BaO2SiO2glasssystemandemployingstepwiseheat2treatmentmethodforcrys2tallization,themicrocrystallineglasscontainingBaFe12O19asmagneticcrystallinephasewaspreparedforharddiskwithoutdeformation,andthemicrocrystallineglasswasanalysedandtestedbymeansofXRD,SEM,andVSMtoclearitsproperty.Itwasshownbytheinvestigationthatthepropertyofsoobtainedmi2crocry2stallineglassissuperiortothatmicrocrystallineglassobtainedbyheat2treatmentwithsingle2stepcrystallizationand,furthermore,thereisnodistortionwiththepreparedspecimenbystepwisecrystalliza2tion.ThephaseofmicrocrystallineglassisBaSiO3,BaFe12O19aftersuchstepwisecrystallizationheat2treat2mentas700/5h+850/10h,thesizeofcrystallinegrainislessthan1m,itssaturatedmagneticmo2mentis19.8Am2/kg,anditscoercivityis1790A/m.Keywords:microcrystallineglass;BaFe12O19;magneticproperties;heat2treatment.,(BaFe12O19),,[13].,.BaFe12O19[4].(),,,.:2005206224:2(NSAF)(10376030):(19782),,,.,.Fe2O32BaO2SiO2,,BaFe12O19,.11.140BaO20Fe2O340SiO2,.,1500,3h.,6001h,.X.32220064JournalofLanzhouUniversityofTechnologyVol.32No.2Apr.2006©1994-2010ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.(CuK)X(XRD),.JSM26700F,,2%HF120s.JDM214(VSM)HiHc,800kA/m,26.22.11.(),.1Fig.1DTAofbaseglass,[5,6].1,590,Tg,.830845,,XRD,830BaSiO3,845BaFe12O19.2.2,,XRD,1.1,A0,BaSiO3.,,BaSiO3.,,BaFe12O19,850,850BaFe12O19.,845BaFe12O19,,BaFe12O19850.:(B1B5),BaFe12O19;(A1A5),BaFe12O19,Ba5Fe14O26.:,700Ba2FeSi2O7,Ba2FeSi2O7,BaFe12O19800900.2.32a,2b1Tab.1Crystalphaseofmicrocrystallineglassindifferentheat2treatmentconditions700/5hA0Ba2FeSi2O7(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):vs=;s=;m=;w=.2232©1994-2010ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.(a)700/5h+850/5h(b)700/5h+850/10h3700/5h850Fig.3SEMofmicrocrystallineofcrystallizationwithdif2ferenttime2durationglassindifferentcrystaltimes2.4JDM214(VSM),HiHc.,,700/5h850.4700/5h,850.,,;10h,1790A/m,,.,BaFe12O19,.K.Goto[7]:BaFe12O191.0m,BaFe12O19.4700/5h850Fig.4MagneticpropertiesofmicrocrystallineglasswithdifferentcrystallizationtimedurationSEM,BaFe12O191.0m,K.Goto.31)Fe2O32BaO2SiO2,BaFe12O19.2),,.3)700/5h+850/10hBaSiO3BaFe12O19,1m,Hi19.8Am2/kg,Hc1790A/m.:[1].[M].:,1981.[2]LEECK,SPEYERRF.MagneticsusceptibilitystudiesofB2O32BaO2Fe2O3glasses[J].ModernPhysicsLettersB,2002,16(13):4852490.[3]ARDELEANI,TODERASM,FILIPS.InfluenceofmeltingtemperatureonironionsbehaviorinB2O32BaO2Fe2O3glassstudiesbymagneticsusceptibility[J].JournalofMagnetismandMagneticMaterials,2004,2722276:3392341.[4]MIRKAZEMIM,MARGHUSSIANVK,BEITOLLAHIA.Crystallisationbehaviour,microstructureandmagneticproper2tiesofBaO2Fe2O32B2O32SiO2[J].CeramicsInternational,2005,31(3):3682374.[5]PW.[M].:,1988.[6].[M].:,1985.[7]GOTOK,ITOM,SAKUARIT.Glassformationandcrys2tallizationofbariumferriteintheNa2O2BaO2Fe2O32SiO2sys2tem[J].JournalofMaterialScience,1994,136(24):134821351.322:Fe2O32BaO2SiO2