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Please use this identifier to cite or link to this item: http://hdl.handle.net/1843/62099
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dc.creatorJéssica Ivone Viegaspt_BR
dc.creatorSherin Thomaspt_BR
dc.creatorRafael Nunes Gontijopt_BR
dc.creatorAriete Righipt_BR
dc.creatorRoberto Luiz Moreirapt_BR
dc.creatorAnderson Diaspt_BR
dc.date.accessioned2023-12-20T12:14:25Z-
dc.date.available2023-12-20T12:14:25Z-
dc.date.issued2022-
dc.citation.volume146pt_BR
dc.citation.spage111616pt_BR
dc.identifier.doihttps://doi.org/10.1016/j.materresbull.2021.111616pt_BR
dc.identifier.issn0025-5408pt_BR
dc.identifier.urihttp://hdl.handle.net/1843/62099-
dc.description.resumoThis work reports the vibrational and intrinsic dielectric properties of apatite-type Sr2RE8(SiO4)6O2 (RE = rare earth) ceramics. Raman scattering and infrared-reflectivity spectroscopy were employed under optimized conditions to determine the phonon modes in this series. The results showed good agreement with the theoretical predictions, in which all 33 Raman-active bands and 18 of the 20 predicted polar phonons were visualized and their positions evaluated as a function of the lanthanide ionic radii under investigation. Dispersion analyses were conducted in all Sr2RE8(SiO4)6O2 ceramics using the Lorentz model and Kramers-Krönig relations to obtain the infrared optical functions and polar phonon characteristics of the materials, from which their intrinsic dielectric properties were calculated. The relationships between the intrinsic properties obtained by infrared spectroscopy and the extrinsic properties determined by direct microwave measurements (postresonator method and resonant cavity procedures), as well as with the values predicted by the Clausius-Mossotti equation were discussed.pt_BR
dc.description.sponsorshipCNPq - Conselho Nacional de Desenvolvimento Científico e Tecnológicopt_BR
dc.description.sponsorshipFAPEMIG - Fundação de Amparo à Pesquisa do Estado de Minas Geraispt_BR
dc.description.sponsorshipOutra Agênciapt_BR
dc.languageengpt_BR
dc.publisherUniversidade Federal de Minas Geraispt_BR
dc.publisher.countryBrasilpt_BR
dc.publisher.departmentICX - DEPARTAMENTO DE FÍSICApt_BR
dc.publisher.departmentICX - DEPARTAMENTO DE QUÍMICApt_BR
dc.publisher.initialsUFMGpt_BR
dc.relation.ispartofMaterials Research Bulletinpt_BR
dc.rightsAcesso Restritopt_BR
dc.subjectApatitespt_BR
dc.subjectSr2RE8(SiO4)6O2pt_BR
dc.subjectSolid oxide fuel cells - SOFCpt_BR
dc.subjectMicrowave dielectricspt_BR
dc.subjectRaman scatteringpt_BR
dc.subjectInfrared spectroscopypt_BR
dc.subject.otherApatitapt_BR
dc.subject.otherCélulas à combustívelpt_BR
dc.subject.otherRaman, Efeito dept_BR
dc.subject.otherMicroondas - Dielétricospt_BR
dc.subject.otherEspectroscopia de infravermelhopt_BR
dc.subject.otherEspectros vibracionaispt_BR
dc.subject.otherMaterial cerâmicopt_BR
dc.subject.otherDispositivos dielétricospt_BR
dc.subject.otherCompostos de metais de terras raraspt_BR
dc.subject.otherTerras raraspt_BR
dc.titleVibrational spectroscopy and intrinsic dielectric properties of Sr2RE8(SiO4)6O2 (RE = rare earth) ceramicspt_BR
dc.typeArtigo de Periódicopt_BR
dc.url.externahttps://www.sciencedirect.com/science/article/pii/S002554082100413Xpt_BR
dc.identifier.orcidhttps://orcid.org/0000-0002-4865-5052pt_BR
dc.identifier.orcidhttps://orcid.org/0000-0002-6335-483Xpt_BR
dc.identifier.orcidhttps://orcid.org/0000-0002-6939-9369pt_BR
dc.identifier.orcidhttps://orcid.org/0000-0001-8752-9609pt_BR
dc.identifier.orcidhttps://orcid.org/0000-0001-6820-0269pt_BR
dc.identifier.orcidhttps://orcid.org/0000-0001-7413-1087pt_BR
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