Polarized Raman scattering and infrared dispersion analysis of Na2ZnGeO4 ceramics

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dc.creatorJéssica Ivone Viegas
dc.creatorRoberto Luiz Moreira
dc.creatorAnderson Dias
dc.date.accessioned2023-11-30T15:48:23Z
dc.date.accessioned2025-09-09T00:13:35Z
dc.date.available2023-11-30T15:48:23Z
dc.date.issued2020
dc.description.sponsorshipCNPq - Conselho Nacional de Desenvolvimento Científico e Tecnológico
dc.description.sponsorshipFAPEMIG - Fundação de Amparo à Pesquisa do Estado de Minas Gerais
dc.description.sponsorshipCAPES - Coordenação de Aperfeiçoamento de Pessoal de Nível Superior
dc.description.sponsorshipOutra Agência
dc.identifier.doihttps://doi.org/10.1002/jrs.5927
dc.identifier.issn1097-4555
dc.identifier.urihttps://hdl.handle.net/1843/61563
dc.languageeng
dc.publisherUniversidade Federal de Minas Gerais
dc.relation.ispartofJournal of Raman Spectroscopy
dc.rightsAcesso Restrito
dc.subjectMaterial cerâmico
dc.subjectDeterminação de tamanho de partícula
dc.subjectEspectroscopia de infravermelho
dc.subjectRaman, Efeito de
dc.subjectRaios X - Difração
dc.subjectMicroscopia eletrônica
dc.subject.otherCeramics
dc.subject.otherDispersion analysis
dc.subject.otherInfrared spectroscopy
dc.subject.otherNa2ZnGeO4
dc.subject.otherPolarized Raman spectra
dc.titlePolarized Raman scattering and infrared dispersion analysis of Na2ZnGeO4 ceramics
dc.typeArtigo de periódico
local.citation.epage1382
local.citation.issue8
local.citation.spage1372
local.citation.volume51
local.description.resumoThe structural, chemical, morphological, and optical-vibration properties of Na2ZnGeO4 ceramic samples prepared by conventional solid-state processing and sintered at 1,100°C are investigated in detail. X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), energy dispersive spectroscopy (EDS), and electron energy-loss spectroscopy (EELS) showed that single-phase samples belonging to the monoclinic Pn (= urn:x-wiley:03770486:media:jrs5927:jrs5927-math-0001) space group were obtained. Optical-vibration investigations by polarized Raman and infrared spectroscopies altogether allowed us to present the characteristic features of the relevant polar phonons of the material, for the first time. Twenty-nine out of the 45 optical modes predicted for Na2ZnGeO4 by group theory were determined, and their symmetries are revealed. The dielectric strengths of the modes that contribute to the dielectric response were obtained. Besides, the infrared dispersion parameters allowed us to calculate the extrapolated dielectric constants ε0 = 7.62 and ε∞ = 2.80, and an intrinsic quality factor Qu × f = 154 THz, at 10 GHz. The obtained values show that this material can be classified as a low-k high-Q ceramics, which potential applications in microwave circuitry.
local.identifier.orcidhttps://orcid.org/0000-0002-4865-5052
local.identifier.orcidhttps://orcid.org/0000-0001-6820-0269
local.identifier.orcidhttps://orcid.org/0000-0001-7413-1087
local.publisher.countryBrasil
local.publisher.departmentICX - DEPARTAMENTO DE FÍSICA
local.publisher.departmentICX - DEPARTAMENTO DE QUÍMICA
local.publisher.initialsUFMG
local.url.externahttps://analyticalsciencejournals.onlinelibrary.wiley.com/doi/10.1002/jrs.5927

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