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1、UNIVERSITYOFELECTRONICSCIENCEANDTECHNOLOGYOFCHINAMASTERTHESIS2015211702071UDC2018.052018.052018061UDCExperimentalStudyonDopingPerformanceModificationofCaCu3Ti4O12GiantDielectricsAMasterDissertationSubmittedtoUniversityofElectronicScienceandTechnologyofChinaDiscipline:Electric
2、alEngineeringAuthor:DengKaiSupervisor:Prof.SongYuanqiangSchool:SchoolofMechanicalandElectricalEngineering4CaCu3Ti4O12(CCTO)(~10)-(I-V)CCTOCCTOCCTO-(I-V)CCTOCCTO4+4+2+4+CCTOZrTiCoTi2+3+2+2+MgYbCuCa(GO)2+3+MgYb1KHz46.210CCTO0.05-(I-V)GOI-VZnOGOZnOCCTOI-VCCTOCCTOCCTO-xZnO(x=0,0.
3、5wt%,0.8wt%,1wt%,1.5wt%)CCTOCCTOZnOZnOCCTOCCTOZnOCCTO4(10)x=0.8wt%0.03(570Hz)-(I-V)CCTOIZnOCCTOCCTOCCTO-xGO+ZnO(x=0,0.1wt%,0.3wt%,0.5wt%)CCTOGO0.6wt%ZnOCCTO+GO-(I-V)GO+ZnOCCTO5GO40~10Hz410CCTO1KHz0.11CCTO-(I-V)EbCCTO295V/cm0.3wt%GO2601V/cmCCTOCCTOCaCu3Ti4O12-IIABSTRACTABSTRAC
4、T4CaCu3Ti4O12r~10),goodtemperaturestability,andremarkablecurrent-voltage(I-V)nonlinearcharacteristics,whichmakestheceramicinthefieldofsmallelectronicdeviceshasgreatapplicationprospects,gettheattentionofresearchers.ButCCTOalsohasitsdisadvantages:highdielectriclossandlargediele
5、ctricconstantaregreatlyaffectedbythepreparationprocess,thisseverelylimitsthevalueofitsuseinactualuse,anditsrelativelylowvoltage-sensitivevoltagealsolimitsitshigher-voltageelectricfieldconditionsrole.Therefore,systematicallystudiesthedielectricmodificationmechanismofCCTOcerami
6、cs,explorethepreparationprocessforoptimizingtheoverallperformanceofceramics,itisofgreatsignificancetoexploretheuseofceramicsinpractice.ThisarticlemainlyfocusesontheresearchstatusofCCTOceramicstoimproveitsgrainandgrainboundaryasthemainline,basedonthesolid-phasereactiontechnolo
7、gy,Investigatedtheeffectofmaterialdopingandpreparationprocessesonthedielectricpropertiesandcurrent-voltage(I-V)nonlinearcharacteristicsofceramics,topromotetheCCTO-basedceramicmaterialsuseingincapacitivematerialsandpressure-sensitivematerials.AseriesofCCTO-basedceramicmaterial
8、sarepreparedbysolid-statereactionmethod,investigatingthedielectricpr
