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1、NPLReportCMMT(A)152FerroelectricHysteresisMeasurement&AnalysisM.Stewart&M.G.CainNationalPhysicalLaboratoryD.A.HallUniversityofManchesterMay1999FerroelectricHysteresisMeasurement&AnalysisM.Stewart&M.G.CainCentreforMaterialsMeasurementandTechnologyNation
2、alPhysicalLaboratoryTeddington,Middlesex,TW110LW,UK.D.A.HallManchesterMaterialsScienceCentreUniversityofManchesterandUMISTManchester,M17HS,UK.SummaryIthasbecomeincreasinglyimportanttocharacterisetheperformanceofpiezoelectricmaterialsunderconditionsrele
3、vanttotheirapplication.Piezoelectricmaterialsarebeingoperatedateverincreasingstresses,eitherforhighpoweracousticgenerationorhighload/stressactuation,forexample.Thus,measurementsofpropertiessuchas,permittivity(capacitance),dielectricloss,andpiezoelectri
4、cdisplacementathighdrivingvoltagesarerequired,whichcanbeusedeitherindevicedesignormaterialsprocessingtoenabletheproductionofanenhanced,morecompetitiveproduct.TechniquesusedtomeasurethesepropertieshavebeendevelopedduringtheDTIfundedCAM7programmeandthisr
5、eportaimstoenableausertosetuponeofthesefacilities,namelyapolarisationhysteresisloopmeasurementsystem.Thereportdescribesthetechnique,someexamplehardwareimplementations,andthesoftwarealgorithmsusedtoperformthemeasurements.Aversionofthesoftwareisincludedw
6、hich,althoughdoesnotallowcontrolofexperimentalequipment,doesincludealltheanalysisfeaturesandwillallowanalysisofdatacapturedindependently.ãCrowncopyright1999ReproducedbypermissionoftheControllerofHMSOISSN1368-6550May1999NationalPhysicalLaboratoryTedding
7、ton,Middlesex,UnitedKingdom,TW110LWExtractsfromthisreportmaybereproducedprovidedthesourceisacknowledged.ApprovedonbehalfofManagingDirector,NPL,byDrCLea,Head,CentreforMaterialsMeasurementandtechnologyFerroelectricHysteresisMeasurementandAnalysisContents
8、1.POLARISATION-FIELD(P-ELOOPS)ANDSTRAIN-FIELD(S-E)MEASUREMENTSFORPIEZOELECTRICCERAMICS...................................................................................................................11.1INTRODUCTION...................
