Field-induced recoverable strain behavior of CuO-added K0.5Na0.5NbO3 ceramics and 1-3 fiber/epoxy piezocomposites

dc.contributor.authorAlkoy, Ebru Mensur
dc.date.accessioned2024-07-12T21:50:10Z
dc.date.available2024-07-12T21:50:10Z
dc.date.issued2010en_US
dc.departmentMaltepe Üniversitesien_US
dc.description.abstractLead-free, dense, 1 mol % CuO-added potassium sodium niobate K0.5Na0.5NbO3 (KNN) fibers were successfully drawn using a novel alginate gelation technique. Piezocomposites with 1-3 connectivity were prepared with an epoxy matrix with various fiber volume fractions (V-f). Electrical properties of the piezocomposites were investigated and compared with bulk KNN ceramics of the same composition. The dielectric constant of the piezocomposites were found to increase from 67 to 191 with the addition of CuO into KNN and increasing V-f in the piezocomposite. A constricted, antiferroelectriclike double hysteresis polarization versus electric field (P-E) loop was observed in bulk KNN. A large and fully recoverable electrostrain of 0.07% was measured for bulk KNN and 0.03% for the piezocomposites under an electric field of 50 kV/cm, respectively. The double hysteresis P-E loop and the recoverable nature of the electrostrain was due to the Cu'''(Nb)-V-O(center dot center dot) defect dipoles creating an internal field that restores the original domain pattern when the field is removed. A very high electrostrictive Q(33) coefficient of 35.6 X 10(-3) m(4)/C-2 and an even higher Q(33) of 162 X 10(-3) m(4)/C-2 was obtained for bulk KNN and piezocomposites, respectively. (C) 2010 American Institute of Physics. [doi: 10.1063/1.3503845]en_US
dc.description.sponsorshipTurkish Academy of Sciencesen_US
dc.description.sponsorshipThe author wish to acknowledge the financial support of Turkish Academy of Sciences. The author thanks Dr. Huseyin Yilmaz and Dr. Sedat Alkoy for valuable discussions on the strain data.en_US
dc.identifier.doi10.1063/1.3503845
dc.identifier.issn0021-8979
dc.identifier.issue9en_US
dc.identifier.scopus2-s2.0-78649279461en_US
dc.identifier.scopusqualityQ2en_US
dc.identifier.urihttps://dx.doi.org/10.1063/1.3503845
dc.identifier.urihttps://hdl.handle.net/20.500.12415/8136
dc.identifier.volume108en_US
dc.identifier.wosWOS:000284270900105en_US
dc.identifier.wosqualityQ2en_US
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.institutionauthorAlkoy, Ebru Mensur
dc.language.isoenen_US
dc.publisherAMER INST PHYSICSen_US
dc.relation.ispartofJOURNAL OF APPLIED PHYSICSen_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/closedAccessen_US
dc.snmzKY01791
dc.titleField-induced recoverable strain behavior of CuO-added K0.5Na0.5NbO3 ceramics and 1-3 fiber/epoxy piezocompositesen_US
dc.typeArticle
dspace.entity.typePublication

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