共沉淀法制备YAG粉体

:2007-09-10:B(2005319):(1964-),,,,,.:1004-4639(2008)04-0324-03YAG,(,110142):透明YAG陶瓷具有容易制造成本低尺寸大掺杂浓度高容易实现多层和多功能陶瓷结构以及可以批量生产等优点,成为单晶强有力的替代者,纳米YAG粉体的合成有利于制备性能优异的YAG透明陶瓷.论文研究使用共沉淀方法制备YAG粉体,以NH4HCO3作为沉淀剂,Y2O3,Al(NO3)39H2O为原料,(NH4)2SO4为静电稳定剂,聚乙二醇(PEG10000)为空间位阻剂,用TGDSC,XRD,SEM分别对YAG前躯体粉末的热历史晶相的组成变化和颗粒的表面形貌进行表征.结果表明:获得了疏松分散,尺寸分布均匀,呈球形的YAG粉体,并且在900下烧结2h就可以获得纯YAG晶相.:;YAG;;:TB383:AY3Al5O12(YAG),,YAG,,YAG,,,YAG.,YAG.YAGY2O3Al2O3,[1-2].,,..,.,,.[3-9],[10-14],[15-16].,.,.YAG,.,,.111Y2O3(9999%),Al(NO3)39H2O()ACH()YAG,(NH4)2SO4,(PEG10000),Y2O3,,,Y(NO3)3,Al(NO3)39H2OAl(NO3)3.Y3+Al3+01mol/L.224Vol.22No.42008.12JOURNALOFSHENYANGINSTITUTEOFCHEMICALTECHNOLOGYDec.2008n(Y)!n(Al)=3!5,1%(PEG10000)(NH4)2SO4,.,2mL/min(ACH),,24h,,,,8010h,YAG800,900,1000,11002h.12TGDSC,10/h,,1000;BrukerD8AdvanceX,CuKI(=0154056nm),4∀/min,10∀~80∀;JEOLJSM6360LV,,,100011002h.221TGDSC110/minTGDSC.1TGDSCTG,389%.200,162%,,200~800175%,,800~100052%,.DSC31,120;660800;935YAG.1000,TGDSC,YAG.XRD(2),YAG,DSC.22XRD2YAG800~11002hXRD.2a,800,,,900YAG(2b),YAGJCPDS#3340.900~1100,YAG,,XRD,(900)YAG.Scherrers,,72nm(1000,2h)78nm(1100,2h).2YAGXRD23SEM3YAG100011002hSEM.3,.3a,1000YAG70nm,4,:YAG3251100,80~90nm,.,.XRD.3YAG2hSEM3Y2O3Al(NO3)39H2O,(NH4)2SO4,PEG(10000),YAG.XRD,900YAG,.:[1],,.Nd:YAG[J].,2004,19(2):295-301.[2],,.YAG[J].,2003,31(9):819-822.[3]SuChunhui,ZhangHuashan,HanHui,etal.PreparationofNeodymiumDopedYttriumAluminumGarnetTransparentCeramicsbyHomogeneousPrecipitationMethod[J].JournalofRareEarths,2005,23(6):716-720.[4]SordeletDJ,AkincM,PanchulaML,etal.SynthesisofYttriumAluminumGarnetPrecursorPowderbyHomogeneousPrecipitation[J].JournaloftheEuropeanCeramicSocity,1994,14(1):123-130.[5]NaoyaMatsushita,NoriyoshiTsuchiya,KatsutoNakatsuka.PrecipitationandCalcinationProcessesforYttriumAluminumGarnetPrecursorsSynthesizedbytheUreaMethod[J].JournaloftheAmericanCeramicSociety,1999,82(8):1977-1984.[6]SeungmanSohn,YoungshikKwon,YeunsikKim,etal.SynthesisandCharacterizationofNearmonodisperseYttriumParticlesbyHomogeneousPrecipitationMethod[J].PowderTechnology,2004,142(1):136-153.[7]LiJiGuang,IkegamiTakayasu,LeeJongHeun,etal.CoprecipitationSynthesisandSinteringofYttriumAluminumGarnet(YAG)Powder:TheEffectofPrecipitant[J].JournaloftheEuropeanCeramicSociety,2000,20(25):2395-2405.[8]LiXia,LiuHong,WangJiyang,etal.PrecipitationofYAG:NdNanosizedPowderbyCoprecipitationMethod[J].MaterialsScienceEngineeringA,2004,379(1):347-350.[9],,,.Nd:YAG[J].,2006,36(1):44-46.[10],,,.(Nd:YAG)[J].,2005,23(3):304-306.[11]WANGJieqiang,YUEYunlong,TAOWenhong,etal.PreparationofTransparentYttriumAluminumGarnetCeramicsbyRelativelyLowTemperatureSolidstatereaction[J].TransNonferrousMet.Soc.China,2003,13(5):1096-1101.[12]FunoDA.RorelliMR,SegadaesAM.CombustionSynthesisofCalciumAluminates[J].MateriaReserchBulletin,1996,31(10):1243-1255.[13]PALM,ChakravortyD.SynthesisofNanocrystalTallineYttriumIronGarnetbySolgelRoute[J].PhysicaE,1999,5(3):200-203.[14],,,.(YIG)[J].,2002,30(3):325-334.(340)3262008DifferentialQuadratureMethodtoAnalyzeNaturalCharacteristicsofFluidConveyingPipewithElasticsSupportsBAORidong,HAOMin,YUYanfang(ShenyangInstituteofChemicalTechnology,Shenyang110142,China)Abstract:Thecharacteristicsoffluidconveyingpipewithbothendssupportedelasticallywasinvestigatedusingthedifferentialquadraturemethod(DQM).Theeffectofsupportingelasticcoefficient,massratio,fluidpressureandflowrate,viscouselasticcoefficientandaxialforceofpipesectiononnaturalcharacteristicswascalculatedandanalyzedbasedonthesimulationequationofDQM.Thenumericalresultsshowthatthenaturalfrequencyisproportionaltoelasticsupportingcoefficientandaxialpressedforceofpipesection,butisproportionalconverselytofluidflowrate,KelvinVoigtviscouselasticcoefficient,fluidpressureandaxialdrawnforceofpipesection.Elasticsupportingontwoendscansimulaterealsupportingconditionaccordingtoitselasticcoefficientofpipesupports.Basisonthemethodintroducinginthearticle,thenumericalresultsaremorereasonableforengineeringanalysis.Keywords:elasticsupports;fluidconveyingpipe;naturalcharacteristics;DQM(326)[15]lnoueM,OtsuHY,KominamiH,etal.SynthesisofYttriumAluminaGarnetbytheHydrothermalMethod[J].J.Am.Ceram.Soc.,1991,74:1452-1454.[16]HatutaY,SeinoK,UraH,etal.SynthesisofYttriumAluminaGarnetbytheHydrothermalMethod[J].J.Mater.Chem.,1999,9:2671-2674.SynthesisofYAGPowdersbyCoprecipitationMethodZHANGYongming,YUHongming(ShenyangInstituteofChemicalTechnology,Shenyang110142,China)Abstract:TransparentYAGceramichastheadvantagesofeasyfabrication,lowcost,largesize,highlydopedconcentration,convenientlyrealizingthemultilayerandmultifunctionalceramicstructure,suitablemassproduction,andisbecominganewgenerationoflasermaterialstosubstitutethesinglecrystals.YAG(Y3Al5O12)powderswerepreparedbycoprecipitationtechniquewhichusedNH4HCO3asprecipitant,(NH4)2SO4aselectricalstabilizer,polyethyleneglycol(PEG10000)assterichindrance.TheprecursorwasstudiedbyTG#DSC.ThestructureandmorphologyofYAGpowderswerecharacterizedbyXRDandSEM.TheresultsofXRDshowthatphaseYAGcrystallitecanbeobtainedasprecursorsheatedat900for2h.Thepowderswithloosely