成都电子科技大学硕士生英语听说与读写

SummaryOfElectronicCeramicMaterialsChinessname：梁福霞Engnishname：LucyStructureandApplicationDevelopmentdirection点击添加文本点击添加文本contentsBasicconceptsBriefhistoryofthedevelopmentWhatistheelectronicceramicsElectronicceramicsisakindofnorganicnonmetallicsolidmaterialThemainchemicalbondingforceistheionicbondandcovalentbond

Usingitselectric,magnetic,sound,light,heat,andotherdirecteffectsandcouplingeffecttoachieveafunctionofadvancedceramicmaterialsHowdoesthedevelopmenthistory?AfteraWorldWar,thedemandofthehighperformanceofmotorvehiclesandaircraftenginesparkplugpromotesthedevelopmentofhighelectricalinsulatingmaterialsInthetwoWorldWar,UniversalapplicationofceramiccapacitorsinelectronicequipmentpromotesthedevelopmentofdielectricceramicsIn1940s,bariumtitanateferroelectricceramicswithspontaneouspolarizationhasbeendevelopedIn1960s,theleadzirconiumtitanatepiezoelectricceramicsaredevelopedforthewideuseoftheenergyexchangedevice

In1980s,SuperconductingceramicsaredevelopedInearlytwenty-firstCentury,graphenewassuccessfullyisolated.Howdoesthestructure?Itisapolycrystallinemultiphasematerials

microstructureStructureofPCBMofHOMOandLUMOWhatareasofapplication?Theearliestceramics,makingchinawareSuperconductingceramicusedinstealthfighterNanomaterialsofelectronicceramicsElectronicceramicthinfilmElectronicdeviceElectricitysupplierscommunicationfieldHowdoesthedevelopmentdirection?miniaturizationWiththerapiddevelopmentofmobilecommunicationandsatellitecommunication,therequirementsforminiaturizationofdevicesarebecomingmoreandmoreurgent.Inparticular,theuseofelectronicceramicmaterialsbasedonvarioustypesofpassivecomponents,isthemainbottleneckoftheminiaturizationofthewholemachine.Therefore,miniaturization(includingchip)isanimportanttargetforresearchanddevelopmentofcomponents,themarketdemandisalsoverystrong.HighfrequencyandfrequencyseriesHighfrequencyistheinevitabletrendofthedevelopmentofdigital3Cproducts.Tomobilecommunicationasanexample,themaincharacteristicsofthefirstgenerationmobilecommunicationisinthe800~900MHz,thesecondgenerationmobilecommunicationwithdigitalsignalasthemaincharacteristicsis900MHzand1.8GHz,atpresent,thefrequencyofthethirdgenerationmobilecommunicationsystemisstudiedin2GHz.Howtoadapttothehighworkingfrequencyisaseverechallengetotheceramicmaterialofallkindsofelectroniccomponents.Therefore,itisahotresearchtopicinthefieldofnewelectroniccomponentstofindthefunctionalceramicmaterialwithgoodhighfrequencycharacteristicsandseriesofworkingfrequency.IntegrationandmodularizationAtpresent,themobilephoneandnotebookcomputertofurthermoreconvenient,morefunctional,fulldigitalandhighintegrationandlowcostdirectiondevelopment,greatlypromotedtheelectroniccomponentsofthechip,miniaturizationandlowcostanddevicecombination,functionalintegrationofthedevelopmentprocess.Integratedfunctionalceramiccomponentsarebasedonlowtemperaturecofiredceramicastheplatform,multilayerceramictechnologyisadoptedtointegratethecapacitance,inductanceandresistancematerialintothelowtemperaturecofiredceramicsubstrate,formingapassiveintegratedceramicdevice.LeadfreeandenvironmentalcoordinationInrecentyears,withtherequirementofenvironmentalprotectionandsustainabledevelopmentofhumansociety,theresearchanddevelopmentofnewenvironmentallyfriendlyironvoltageceramicshasbecomeoneofthehotresearchanddevelopmentofthedevelopedcountries.In2001,theEuropeanParliamentpassedadecreeonthelimitsofharmfulsubstancesinelectricalandelectronicequipment,andhasscheduledtobeimplementedin2008,whichislimitedtotheuseofsubstancesincludingleadbasedpiezoelectricdevices.Thedevelopmentofinfor