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Please use this identifier to cite or link to this item: http://hdl.handle.net/1843/62107
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dc.creatorJéssica Ivone Viegaspt_BR
dc.creatorRoberto Luiz Moreirapt_BR
dc.creatorAnderson Diaspt_BR
dc.date.accessioned2023-12-20T14:26:19Z-
dc.date.available2023-12-20T14:26:19Z-
dc.date.issued2021-
dc.citation.volume148pt_BR
dc.citation.spage109693pt_BR
dc.identifier.doihttps://doi.org/10.1016/j.jpcs.2020.109693pt_BR
dc.identifier.issn0022-3697pt_BR
dc.identifier.urihttp://hdl.handle.net/1843/62107-
dc.description.resumoPolycrystalline Zn2GeO4 powders and sintered ceramics were prepared by the microwave–assisted solid-state reaction method. Structural, chemical, and morphological properties, as well as the optical-vibration features of the obtained materials, were investigated by XRD, scanning and transmission electron microscopies, polarized micro-Raman scattering, and infrared spectroscopy. Single-phase, high-purity, crystalline powders and ceramics belonging to the rhombohedral space group showed excellent polarized Raman response, which allowed us to determine and assign 39 gerade phonons out of the 42 optical modes predicted for Zn2GeO4 by group theory. Also, the 29 most relevant polar phonons (ungerade) of the sintered material were revealed and the dielectric strengths of the modes that contribute to the dielectric response were obtained. The infrared dispersion parameters allowed us to calculate the extrapolated dielectric constants = 7.02 and = 2.41, and an intrinsic quality factor Qu × f = 187 THz, at 10 GHz, values that are quite suitable for applications as low-k high-Q materials in microwave circuitry. The very comprehensive set of phonon modes obtained here should be useful for understanding the behavior of the material, needed to improve their already numerous optical applications (luminescence, photocatalysis).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.sponsorshipCAPES - Coordenação de Aperfeiçoamento de Pessoal de Nível Superiorpt_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.ispartofJournal of Physics and Chemistry of Solidspt_BR
dc.rightsAcesso Restritopt_BR
dc.subjectZn2GeO4pt_BR
dc.subjectCeramicspt_BR
dc.subjectDispersion analysispt_BR
dc.subjectRaman scatteringpt_BR
dc.subjectInfrared spectroscopypt_BR
dc.subject.otherSemicondutores policristalinospt_BR
dc.subject.otherMaterial cerâmicopt_BR
dc.subject.otherDeterminação de tamanho de partículapt_BR
dc.subject.otherRaman, Efeito dept_BR
dc.subject.otherEspectroscopia de infravermelhopt_BR
dc.subject.otherMicroondaspt_BR
dc.subject.otherLuminescênciapt_BR
dc.subject.otherFotocatálisept_BR
dc.titleOptical-vibration and intrinsic dielectric properties of low-k high-Q Zn2GeO4 ceramicspt_BR
dc.typeArtigo de Periódicopt_BR
dc.url.externahttps://www.sciencedirect.com/science/article/pii/S0022369720312713pt_BR
dc.identifier.orcidhttps://orcid.org/0000-0002-4865-5052pt_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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