新型类钙钛矿高介电常数氧化物的制备与结构表征

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2、n而sdlssertatio氏wechoose幻浑0p盯。vskite一1阮highdielectriccons加叮toxidssBaTi刃sandCaCu3几olZasthe劝记yotrjects.WehavesuccessfullyPreParedtheBaTi20，即dCaC姆T玩olZnaopewdersby501一Gelmethod，明dthenP代甲aredtheirnanoreds勿hydrothen刀almethodandmoltensaltmethod.T七e而crostruc仪叮eswereinvestigated

3、indelail.Themaworkandresultsareasfollows:1.BaTi205andCaC均T玩olZnaopowderswerePr印aredbyawet.che而calmethod，501一Gelmethod.T七eirParticlediameterS附a比ut50~400nm.However，inthepreparatlonofCaCu3玩olZnao训wders，the茂畔mostlysolidre即tionmcthodsinliteratires.hi而sdisse到刁ti叽wePrePareditb

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5、behaviorsofBaTi205andCaC均T肠olZnanopowders·TheinvestlgationshowedthetO.p，鱿以edependenceofthe几叨anspectraofCCTOnaopo从d周rs丘’om83to79SKhadnOtbeenfoundthePhasetr田抬itionofCCTO.soweconcluded，thesh抑reduceoftheCCTO，shighdielectricco正出川tunderl00Khasnorelati。璐衍ptotheatomdisPI即ementr

6、esulted丘omthereduceoflem详湘ltore.Accordingtothetemperati叮ed勺笼ndenceoftheR别mans户沈tmofBaTi20，，Thereisadr出naticnazrDwingofthe凡Unanlines比tweenr00们ntemperatUreand83Ksevera】R别旧anpeaksb代akuPtoclustersofsevera】sh抑体川侣.丁beR别的anspec加ofBaTiZO，ocursaseriesoftransformationsatbout740K.

7、TbereissomevibrationmodesdisaPpeare氏w垃cb加dicatethec坛mgeofthestrUcture.ThePhasetr出”itoncanbeinterPretedasthe介n’odectricpha阴七.”it既3.TbeB涌20，po1ycrysta]linenaorodswersuccessfillyPreP毗dbyhydrothermal(solvothennal)method.ThediaJ的以ersofthenano代心sareabout3o~100刊m，andZo~人卜别门d40

8、0刊mlengthThefonnationofnaomdsisrelatingtothatoleic即idchangesto而celle找心sinl城沁往田e.六习dweinvestigatedtheg以劝conditi