CHARACTERIZATION OF PIEZOCERAMIC-HYDROXYAPATITE COMPOSITES FOR BONE TISSUE ENGINEERING
Keywords:
Lead-free piezoceramics, electrical properties, biomaterials, bone-repair applicationsAbstract
Hydroxyapatite(HA)hasbeenwidelyusedasbonerepairingmaterial,asitschemicalcompositionresembleshumanbonecomposition.However,differentclinicalreportsrevealthatpureHAhasalowboneinductionwhilehavinglowmechanicalproperties;inaddition,itisunderstoodbyscientistthatpiezoelectricpropertiescanbeobservedinhumanbonetissue.Therefore,thisstudyanticipatesthatuseofthepiezoelectriceffectinlead-freepiezoceramicswouldbefeasibleforbonerepairapplications.Thecrystalstructure,microstructure,andelectricalpropertiesofbariumtitanate(BT),bariumcalciumzirconatetitanate(BCZT),90BT-10HAcompositesand90BCZT-10HAcompositeswerethereforeinvestigated.X-raydiffraction(XRD)patternsrevealedthatapureperovskitephasewasobservedinpureBTandBCZTceramics,whileHAdecompositionwasfoundin90BT-10HAand90BCZT-10HAceramics.Furthermore,additionofHAintoBTandBCZTceramicscausedadecreaseinaveragegrainsizeanddielectricpermittivityaswellaspolarization.Insummary,resultsshowedthat90BT-10HAceramicsisapromisingcandidateforuseinboneimplantsandforbonerepairapplications,sinceitexhibitedgooddielectricpermittivityandpolarization.
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