Please use this identifier to cite or link to this item: http://hdl.handle.net/10773/19215
Full metadata record
DC FieldValueLanguage
dc.contributor.authorTkach, Alexanderpt
dc.contributor.authorVilarinho, Paula M.pt
dc.contributor.authorAlmeida, Abiliopt
dc.date.accessioned2017-12-07T19:04:54Z-
dc.date.issued2015pt
dc.identifier.issn0022-3727pt
dc.identifier.urihttp://hdl.handle.net/10773/19215-
dc.description.abstractThe structural and low-frequency dielectric properties of Y-doped strontium titanate ceramics prepared by the conventional mixed oxide method are investigated. The lattice parameter is found to decrease linearly in the Sr1-1.5xYxTiO3 system, confirming the incorporation of Y onto the Sr site of perovskite lattice of strontium titanate up to the solid solubility limit below x = 0.05. The real and imaginary parts of the dielectric permittivity of Sr1-1.5xYxTiO3 ceramics exhibit a relaxation between 100 Hz and 1 MHz in the temperature range 10-40 K, slightly shifting to higher temperatures with increasing Y content. Such dielectric behavior, yielding real part of the dielectric permittivity up to 35 000, is attributed to the relaxation of individual dipoles formed by off-center displacement of Y3+ ions on Sr sites in a highly polarizable lattice of strontium titanate. The other dielectric relaxation observed in Sr1-1.5xYxTiO3 from 125 to 300 K is attributed to the oxygen vacancy related mechanisms.pt
dc.language.isoengpt
dc.publisherIOP PUBLISHING LTDpt
dc.relationinfo:eu-repo/grantAgreement/FCT/COMPETE/132936/PTpt
dc.relationinfo:eu-repo/grantAgreement/FCT/5876/147332/PTpt
dc.rightsrestrictedAccesspor
dc.subjectOXIDE FUEL-CELLSpt
dc.subjectELECTRICAL-CONDUCTIVITYpt
dc.subjectANODE MATERIALSpt
dc.subjectSRTIO3pt
dc.subjectMICROSTRUCTUREpt
dc.subjectSPECTROSCOPYpt
dc.subjectBI-SRTIO3pt
dc.subjectRELAXORpt
dc.titleLow-temperature dielectric relaxations in Y-doped strontium titanate ceramicspt
dc.typearticlept
dc.peerreviewedyespt
ua.distributioninternationalpt
degois.publication.issue8pt
degois.publication.titleJOURNAL OF PHYSICS D-APPLIED PHYSICSpt
degois.publication.volume48pt
dc.date.embargo10000-01-01-
dc.relation.publisherversion10.1088/0022-3727/48/8/085302pt
dc.identifier.doi10.1088/0022-3727/48/8/085302pt
Appears in Collections:CICECO - Artigos



FacebookTwitterLinkedIn
Formato BibTex MendeleyEndnote Degois 

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.