Optical vibrational properties of Bi2-xCaxSn2O7-x/2 ceramics

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dc.creatorValéria M. Lima
dc.creatorRafael Mendonça Almeida
dc.creatorAlysson Steimacher
dc.creatorAdenilson Oliveira dos Santos
dc.creatorDiego Barbosa
dc.creatorAnderson Dias
dc.creatorRoberto Luiz Moreira
dc.date.accessioned2023-11-28T20:26:45Z
dc.date.accessioned2025-09-09T01:26:35Z
dc.date.available2023-11-28T20:26:45Z
dc.date.issued2019
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/10.1016/j.jallcom.2019.01.375
dc.identifier.issn0925-8388
dc.identifier.urihttps://hdl.handle.net/1843/61467
dc.languageeng
dc.publisherUniversidade Federal de Minas Gerais
dc.relation.ispartofJournal of Alloys and Compounds
dc.rightsAcesso Restrito
dc.subjectMaterial cerâmico
dc.subjectMicroestrutura
dc.subjectEspectroscopia de infravermelho
dc.subjectRaman, Espectroscopia de
dc.subjectEspectros vibracionais
dc.subjectRaman, Efeito de
dc.subject.otherBi2Sn2O7Ca-doped
dc.subject.otherVibrational properties
dc.subject.otherRaman scattering
dc.subject.otherInfrared spectroscopy
dc.subject.otherMicrostructure
dc.titleOptical vibrational properties of Bi2-xCaxSn2O7-x/2 ceramics
dc.typeArtigo de periódico
local.citation.epage1039
local.citation.spage1030
local.citation.volume786
local.description.resumoBi2-xCaxSn2O7-x/2 ceramics were synthesized by solid-state reactions and sintered at 1050 °C. Raman and infrared spectroscopies were used to investigate the optical vibrational properties of pure Bi2Sn2O7 ceramics, as well as to understand the influence of Ca2+ substitution for Bi3+ on the vibrational characteristics of the Bi2-xCaxSn2O7-x/2 system (for x ≤ 0.02). First, we demonstrate that partial substitution of Bi3+ with Ca2+ ions does not promote the β-phase, as it is commonly reported for other cationic substituents. The results of Raman and infrared spectroscopies showed that 34 bands were observed by Raman scattering, and 22 modes were observed by infrared spectroscopy. It was also verified that Raman scattering was quite sensitive to the morphological features of the samples, which was not the case for infrared spectroscopy. Scanning electron microscopy on the sintered samples showed that such sensitivity is partially linked to the grain sizes, which are larger than the incident light beamwidth, but smaller than the infrared beamwidth. Thus, infrared spectroscopy takes contributions from the average of a number of grains, while Raman spectroscopy evaluates contributions of single grains. The dielectric merit factors of the Bi2Sn2O7 ceramics were also obtained from infrared spectroscopy, namely ɛ0 = 24.2 and Qu×f = 56.9 THz. Finally, it is worth noting that this paper presents the first investigation of infrared spectra of Bi2-xCaxSn2O7-x/2 materials.
local.identifier.orcidhttps://orcid.org/0000-0002-8039-6425
local.identifier.orcidhttps://orcid.org/0000-0002-6347-0160
local.identifier.orcidhttps://orcid.org/0000-0002-2248-5104
local.identifier.orcidhttps://orcid.org/0000-0003-0432-2712
local.identifier.orcidhttps://orcid.org/0000-0001-7413-1087
local.identifier.orcidhttps://orcid.org/0000-0001-6820-0269
local.publisher.countryBrasil
local.publisher.departmentICX - DEPARTAMENTO DE FÍSICA
local.publisher.departmentICX - DEPARTAMENTO DE QUÍMICA
local.publisher.initialsUFMG
local.url.externahttps://www.sciencedirect.com/science/article/pii/S0925838819304104

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