钛酸钡粉体制备方法研究进展

:2003-07-31:(1978-),(),,,2,1,2,1(1.,100083;2.,030024):钛酸钡因其具有优越的介电性能而被广泛应用于多层陶瓷电容器热敏电阻光电器件等电子元件本文综述了钛酸钡粉体制备的各种方法,认为液相法制备的粉体因具有纯度高成分均匀粒径小等特点而成为制备粉体主要方法,其中溶胶-凝胶自燃合成法工艺简单粉体自净化易于规模化生产,水热合成法所得粉体不团聚粒度较均匀,是两种极具发展前景的制粉方法:研究进展;粉体制备方法;钛酸钡:TF123.7+2:A:1006-6543(2003)06-0027-05PROGRESSONPREPARATIONOFBARIUMTITANATEPOWDERSYANGFeiyu2,YANQingzhi1,ZHAOHaofeng2,GEChangchun1(1.LaboratoryofSpecialCeramicsandPowderMetallurgy,UniversityofScienceandTechnologyBeijing,Beijing100083,China;2.CollegeofMaterialsScienceandEngineering,TaiyuanUniversityofScienceandTechnology,TaiyuanShanxi030024,China)Abstract:BaTiO3asaceramicwithhighdielectricconstant,isusefulformanufactureofmultilayerceramiccapacitors,thermistorsandelectroopticcomponents.ThedifferentmethodsforsynthesisingBaTiO3arepresented.Theconventionalsynthesisisbasedonthesolidstatereactionsandcoarse,impure,inhomogeneousandmultiphasepowdersareproduced.Lowtemperaturewetchemicalprocessesarepromisingtoproducehighpurity,homogeneous,ultrafinepowderswhichmeettherequirementsforelectroniccomponents.Amongthemsolgelautoignitionsynthesis(SAS)issimple,selfcleaningandeasyforscaleproduction,andhydrothermalsynthesiswhichcanavoidagglomerationandhavehomogeneousgranularity,aretwomoreprospectiveprocessesformanufactureofbariumtitanatepowders.Keywords:progress;powderpreparation;bariumtitanate,,,,,,,,,,,,136200312POWDERMETALLURGYINDUSTRYVol.13No.6Dec.2003,,,1(TiO2,BaO)(TiO2,Ba(NO3)2),,1100,[1]:BaCO3+TiO2BaTiO3+CO2BaTiO3:4m(1.5m),0.73m2/g,1.0g/cm3,6.01g/cm3BaTiO31[2]1BaTiO3()/%[2]BaOTiO2Fe2O3Na2OK2OSrO164.9433.850.00950.0220.0012-264.9733.860.00450.00370.0024-365.6334.19-0.01-0.01,,;,,;,3~12mmAttritor,,[3]22.1BaTiO3(),,,,BaTiO3[2]BaTiO3(),380~500,30~50MPa[4],BaTiO3,,[2]TiCl4NH3!H2OTi(OH)4Ba(OH)2!8H2O,2005h,100nmBaTiO3[5],240,12h1.6,,,,,,Cl-,80,[6]∀-#∀#,,,,[7]TiO2Ba(OH)2BaTiO3,,TiO2,,OH-,Ba2+BaTiO3[8],;,;,,,;;Ba/Ti[5]1992,,,,[9]2.22.2.1,[5]Ba(OC3H7)2Ti(OC5H11)4,!28!13BaTiO3[10],,,TiO2BaCO3,,1SEM,1SEM2.2.2TiCl4BaCl2,,,[BaTiO(C2O4)2!4H2O,BaTiO3,BTO],,BaTiO3[2]2BaTiO3,BTOBaTiO3,BaCO3BaTi2O5,BaTiO3,[11]22BaTiO3[11]TiCl4+H2OTiOCl2+2HClBaCl2+TiOCl2+2H2C2O4+4H2OBaTiO(C2O4)2!4H2O+4HClBaTiO(C2O4)!4H2OBaTiO(C2O4)2+4H2OBaTiO(C2O4)20.5BaTi2O5+0.5BaCO3+2CO+1.5CO20.5BaTi2O5+0.5BaCO3BaTiO3+0.5CO22SEMSEM,,,,,2.32.3.1,(-40),(0.1mmHg),[12]Ba[Ti(C6H4O2)3]!4H2O,BaTiO3[11],,,,[12]2.3.2∀#,,,(70~95),700~1200[13,14],,,,,,,,,,750[14]2.4--:,,,,,,!29!6:,,[1],-2.4.1BaTi,[1],,;750,[11],,[15]2.4.2TiBaTiTi,,Ti,,BaTi,BaTiTiO2BaTiO2,BaTi10~20nm,BaTi700BaTi,BaCO3,BaCO3TiO2BaCO3,,[1]2.4.3-[11]pH11~14Ti(OH)2-6Ba2+Ti(OH)62-Ba2+Ba,,Ti(OH)62-Ba2+,TiOH,Ba,[1]2.4.4-(SAS),,:(1)(150~200),;(2)(1000~1400),,(3);(4),;(5);(6);(7),,;(8),,[1]SAS,Ba(NO3)2-TiO(NO3)2-C6H8O7!H2O,:TiCl4,,,pH,,650,,,3SASSEM,,,14.2g/m2,70nm,BaO/TiO21.002,BaCO3,BaTiO33SASSEMSAS,SAS,,!30!13,ZrO2Al2O3LaCrO33:,,,,,,[1].BaTiO3TiO2ZrO2Al2O3[D].,2001.[2],,,.[J].,1997,(4):1-10.[3],,,.BaTiO3PTCR[J].,1999,26(3~4):399.[4],.BaTiO3[J].,1999,27(6):714-720.[5],,,.[J].,2002,21(1):34-36.[6],,.[J].,2001,32(5):558-560.[7],.[J].,1996,11(2):193-206.[8],.BaTiO3[J].,1995,10(4):385-390.[9]BharatL.Newalkar,SridharKomarneni,HiroakiKatsuki.Microwavehydrothermalsynthesisandcharacterizationofbariumtitanatepowders[J].MaterialsResearchBulletin,2001,36:2347-2355.[10],,.[J].,2000,18(1):46-50.[11]PradeepP.Phule,SubhashH.Risbud.ReviewLowtemperaturesynthesisandprocessingofelectronicmaterialsintheBaOTiO2system[J].JournalofMaterialsScience,1990,25:1169-1183.[12].[J].,33(3):23-25.[13],,,.[J].,2001,7(2):18-20.[14],,,.[J].,2002,17(5):938-944.[15]R.N.Viswanath,S.Ramasamy.PreparationandferroelectricphasetransitionstudiesofnanocrystallineBaTiO3[J].NanoStructureMaterials,1997,8(2):155-162.!!2003:D601:D,,:2003,;,;;,,,,,(),,,耀星摘自∃科技日报%2003∀#:D601:D3,,,()()(),道松摘自∃信息视窗%2003-03-20!31!6: