大功率變壓器用壓電陶瓷的機(jī)電性能及低溫?zé)Y(jié)研究

1、天津大學(xué)碩士學(xué)位論文大功率變壓器用壓電陶瓷的機(jī)電性能及低溫?zé)Y(jié)研究姓名：高洪業(yè)申請(qǐng)學(xué)位級(jí)別：碩士專業(yè)：材料學(xué)指導(dǎo)教師：孫清池20090501ABSTRACTHigh—powermultilayerpiezoelectricceramicstransformerdesirestheceramicssinteringatlowtemperatureandthepropertiesofthesematerialsshouldcombineah

2、ighQmwithhigh蜂andlowtardsimultaneouslyInordertomeettheserequirementsthequaternarypiezoelectricceramicsofPMS—PNW—PZTwasinvestigatedfiomtheaspectsofpreparationtechnique，compositiondesignandlowtemperaturesinteringTheinfluen

3、cesofZrcontentandsinteringtemperaturewereinvestigatedTheresultsshowthattheZ胛i=49／51’ceramicssinteredat1225℃achievedbetterproperties，whichwereasfollows：占／80=1855，tard=043％，d33=336pC／N，Ko=064，Qm=1912AnditWaSfoundthatMnelem

4、ententerthelatticeintheformofMn3duringsintering，unitcellparametersdecreased，M0graduallytransformsintoMn2withthesinteringtemperatureraised，theunitcellparametersincreaseTofurtherimprovetheelectricalpropertiesofthepropertie

5、softheceramics，theinfluencesofPNWcontentandsinteringtemperaturewereinvestigatedTheresultsshowthattheperformanceofthePNW=002ceramicssinteredat1225“Cachievedbetterproperties，whichwereasfollows：s；3／占o(jì)=1957，tan廬028％，／33=343p

6、C／N，l皆062，鳊=2511Toachievealowtemperaturesinteredceramics，CuOwasselectedasadopantandtheinfluenceofCuOcontentandsinteringtemperaturewereinvestigatedindetailsTheresultsshowedthatthesinteringtemperatureWasreducedto1225℃from9

7、70℃withtheadditionofCuOAllCuOdopedsamplescanobtaintheperovskitestructureTheresuksshowthattheCuOdopingof07wt％ceramicssinteredat970。Cachievedbetterproperties，whichwereasfollows：s3T3肛o=1645，tan／；=075％，d33=255pC／N，l(po44，Qm=

8、1500Asthesolubilityofsolidsolutionislimited，onlyaportionoftheCuOenterthelattice，Cureplacethe(TiZr)4，theconstantofcdecreaseswhileaincreases，andtheratioofc／adecreasedTheremainingCuOconcentratedinthegrainboundarytoenhanceth