水熱法制備鈦酸鍶鋇鐵電薄膜的研究.pdf

1、陜西科技大學碩士學位論文水熱法制備鈦酸鍶鋇鐵電薄膜的研究姓名：馬景云申請學位級別：碩士專業(yè)：材料學指導教師：苗鴻雁談國強20060501PREPARATIoNoFBAIUUMSTRoNTIUMTITANATEFERRoELECTRICTHINFILMSBYHYDROTHERMALABSTRACTBariumstrontiumtitanate(BaxSrl《Ti03)iSthesolidsolutionofBaTi03andSrTi03，

2、usuallywecallitBSTforconvenienceItiSallimportantferroelectricmaterialandheatcapacitymaterial，whosecharacterishighdielectricconstant、lowdielectricwastage、Curietemperaturemovingindifferentcompositionanddielectricconstantva

3、ryingwithnonlinearityoftheelectricfieldatthesametimeeteItiSwidelyusedinmanyfieldssuchaslarge—scaledynamicmemorizer、microwavecoordinationapparatus。whichnowhasbeenthemostwidelystudiedmaterialinintegrationinstrumentfieldsIn

4、thispaperBSTnanopowderswerepreparedbyhydrothermal，andtheirfilmsOilsinglecrystalSi(111)weresynthesizedbysol—gelhydrothermalmethodTheformationmechanismoftheBSTpowdersandgelfilmshydrothermalcrystallizationbehaviorhydrotherm

5、alreactionmechanism，morphologiesandphaseconstituteofBSTfilmswereidentifiedbymeansofDSCTG、XRD、IR、SEMandAFMtechniquesTheeffectsofcompositionandhydrothermaltreatmentprocess，suchastheheattreatmenttemperatureofprecursorfilms，

6、thehydrothermaltreatmenttemperature，thehydrothermaltreatmenttimeandmineralizerconcentration，OilthemicrostructureandthecrystallinebehaviorofBSTtIlinfilmswereinvestigatedindetails。TheresultsshowthatBSTnanopowderswereprepar

7、edbyhydrothermalsynthesisfromSr(N03)2、nCl4、Ba(OH)281120andKOHsolutionontheconditionofT190℃240℃t=2h～6hXRDmeasurementsshowthattheBSTpowdersareperovskiteandthesizerangeofparticlesiS2m40nmHighpurebariumacetate(B“CH3cooh)，str