bacub2o5助烧多种微波介质陶瓷组织和性能的研究word格式论文.docxVIP

陶瓷的主晶相，可使陶瓷的烧结温度从1100°C降低到900°C，且致密度高于纯片的致密度，添加3wt%BCB的ZNT陶瓷获得好的介电性能：Kr=48,Q·f=15258GHz,TCF=41×10-6/°C(5GHz)，在研究陶瓷片与Ag电极共烧的过程中发现，陶瓷片与Ag电极共烧界面结合紧密，元素无扩散现象，具有良好的共烧匹配性，是一种可用于多层微波元器件制造的极具应用价值的中介电常数LTCC微波介质材料。关键词：微波介质陶瓷；助烧；LTCC；介电性能；液相烧结论文类型：基础研究Subject:STUDYOFDIELECTRICPROPERTIESandMICROSTRUCTUREONBaCu(B2O5)DOPEDIFFERENTMICROWAVEDIELECTRICCERAMICSSpecialty:MaterialogyName:SunLuSupervisor:HuangJin-liangABSTRACTLowTemperatureCo-firedCeramics(LTCC)isacomponentsintergrationtechnologyroseinrecentyears.Ithasbecomethepreferredmethodtoachievetheinteration,miniaturization,andmodularizationofvariousmicrowavecomponentsworkedinthecircuits.Itiswidelyusedinmilitaryandciviliancommunitionsystems.MicrowavedielectricceramicsarethekeymaterialofLTCCtechnology,Asnewelectrionicmaterials,microwavedielectricceramicsarewidelyusedasthecoremicrowavecomponentsinfiltersandresonatorsfields.Tosatisfythecofiringofceramicsandelectrods,Inthesethesis,wechooseddifferentmicrowavedilectricceramics,andusedBaCu(B2O5)assinteringaidstodecreasethesinteringtemperatureofthesesystems,theeffectsofBCBcontentonsinteringtemperatureandmicrowavedielectricpropertiesoftheseceramicswerealsoinvestigated.CaO-Li2O-Re2O3-TiO2(Re=Ln,Sm,Nd)systemshasanorthorhombicperovskitestructure,andiswidelystudiedduetogooddielectricproperties.CaO-Li2O-Sm2O3-TiO2ceramicshadgooddielectricproperties:Kr=110，Q·f=4500GHz,TCF=7×10-6/°C,3GHz,whenmolarration(CaO:Li2O:Sm2O3:TiO2)=16.0:9.0:12.0:63.0.Althoughthissystemsownhighdielectricconstant,lowqualityfactorconstrainItsuseinhighfrequency.AsCaOwaspartlysubstitutebyBaO,withtheratioofn(CaO:BaO:Li2O:Sm2O3:TiO2)=14:4:8:12:63,CBLSTceramicsexhibitaKr=95.5,Q·f=7580GHz,TCF=-6.9×10-6/°C,3GHz.Eventhoughmanytypesofdielectricceramicshavebeenreported,mostofwhichcouldbewellsinteredabove1300°C.Recently,ZnO–Nb2O5–TiO2systemwasfoundtohavehighdielectricpropertiesatlowersinteringtemperature.Itsfoundthat2.5ZnO–2.5Nb2O5–5TiO2ceramicssinteredat1100°CexhibitedgoodmicrowavedielectricpropertiesofKr=58,Q·f=16300GHzandTCF=90×10-