Dielectricandferroelectricpropertiesof0.93Bi0.5Na0.5TiO3–0.07BaTiO3 (BNT–BT) and0.93Bi0.5Na0.5TiO3–0.06BaTiO3–0.01K0.5Na0.5NbO3 (BNT–
BT–KNN)ceramicswerestudiedindetail.AnXRDanalysisconfirmedthesingleperovskitephaseformationinboththesamples.Roomtemperature(RT)
dielectric constant(εr) 1020 and1370,respectivelyat1kHzfrequencywereobtainedintheBNT–BT andBNT–BT–KNN ceramics.Temperature
dependent dielectricandthepolarizationvs.electric field (P–E) studiesconfirmedthecoexistenceofferroelectric(FE)andanti-ferroelectric(AFE)phases
in theBNT–BT andBNT–BT–KNN ceramics.SubstitutionofKNNintotheBNT–BT systemdecreasedtheremnantpolarization,coercive field andthe
maximumstrainpercentage.Theenergystoragedensityvalues 0.485J/cm3 and0.598J/cm3 wereobtainedintheBNT–BT andBNT–BT–KNN
ceramics,respectively.Highinducedstrain%intheBNT–BT ceramicsandthehighenergystoragedensityintheBNT–BT–KNN ceramicssuggested
abouttheusefulnessofthesesystemsfortheactuatorand theenergystorageapplications, respectively.
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