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Intense photoluminescence emission at room temperature in calcium copper titanate powders

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dc.contributor.authorMoura, F.
dc.contributor.authorSimões, A. Z. [UNESP]
dc.contributor.authorDeus, R. C. [UNESP]
dc.contributor.authorSilva, M. R.
dc.contributor.authorVarela, José Arana [UNESP]
dc.contributor.authorLongo, Elson [UNESP]
dc.contributor.institutionUniversidade Federal de Itajubá (UNIFEI)
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.date.accessioned2014-05-27T11:29:01Z
dc.date.available2014-05-27T11:29:01Z
dc.date.issued2013-05-01
dc.description.abstractA study was undertaken about the structural and photoluminescent properties at room temperature of CaCu3Ti4O12 (CCTO) powders synthesized by a soft chemical method and heat treated between 300 and 800 °C. The decomposition of precursor powder was followed by thermogravimetric analysis (TG-DTA), X-ray diffraction (XRD), Fourier transform infrared (FT-IR), Fourier transform Raman (FT-Raman) and photoluminescence (PL) measurements. XRD analyses revealed that the powders annealed at 800 °C are becoming ordered and crystallize in the cubic structure. The most intense PL emission was obtained for the sample calcined at 700 °C, which is not highly disordered (300-500 °C) and neither completely ordered (800 °C). From the spectrum it is clearly visible that the lowest wavelength peak is placed around 480 nm and the highest wavelength peak at about 590 nm. The UV/vis absorption spectroscopy measurements showed the presence of intermediate energy levels in the band gap of structurally disordered powders. © 2012 Elsevier Ltd and Techna Group S.r.l.en
dc.description.affiliationUniversidade Federal de Itajubá UNIFEI Campus Itabira, Rua São Paulo 377, 35900-37 Itabira, Minas Gerais
dc.description.affiliationUniversidade Estadual Paulista UNESP Faculdade de Engenharia de Guaratinguetá, Av. Dr Ariberto Pereira da Cunha 333, 12.516-410 Guaratinguetá, São Paulo
dc.description.affiliationLaboratório Interdisciplinar em Cerâmica Instituto de Química Universidade Estadual Paulista, P.O. Box 355, 14801-907 Araraquara, São Paulo
dc.description.affiliationUnespUniversidade Estadual Paulista UNESP Faculdade de Engenharia de Guaratinguetá, Av. Dr Ariberto Pereira da Cunha 333, 12.516-410 Guaratinguetá, São Paulo
dc.description.affiliationUnespLaboratório Interdisciplinar em Cerâmica Instituto de Química Universidade Estadual Paulista, P.O. Box 355, 14801-907 Araraquara, São Paulo
dc.format.extent3499-3506
dc.identifierhttp://dx.doi.org/10.1016/j.ceramint.2012.11.034
dc.identifier.citationCeramics International, v. 39, n. 4, p. 3499-3506, 2013.
dc.identifier.doi10.1016/j.ceramint.2012.11.034
dc.identifier.issn0272-8842
dc.identifier.lattes3573363486614904
dc.identifier.scopus2-s2.0-84874668001
dc.identifier.urihttp://hdl.handle.net/11449/75204
dc.identifier.wosWOS:000318129100003
dc.language.isoeng
dc.relation.ispartofCeramics International
dc.relation.ispartofjcr3.057
dc.relation.ispartofsjr0,784
dc.rights.accessRightsAcesso restrito
dc.sourceScopus
dc.subjectA. Ceramics
dc.subjectB. Chemical syntheses
dc.subjectB. Powder metallurgy
dc.subjectC. X-ray diffraction
dc.subjectCalcium copper titanates
dc.subjectChemical synthesis
dc.subjectCubic structure
dc.subjectFourier transform infrared
dc.subjectFourier transform Raman
dc.subjectFT-Raman
dc.subjectIntermediate energies
dc.subjectPhoto-luminescent properties
dc.subjectPhotoluminescence emission
dc.subjectPhotoluminescence measurements
dc.subjectPL emission
dc.subjectPrecursor powder
dc.subjectRoom temperature
dc.subjectSoft chemical method
dc.subjectSpectroscopy measurements
dc.subjectUv/vis absorptions
dc.subjectXRD analysis
dc.subjectCalcination
dc.subjectPhotoluminescence
dc.subjectPowder metallurgy
dc.subjectThermogravimetric analysis
dc.subjectX ray diffraction
dc.subjectPowders
dc.titleIntense photoluminescence emission at room temperature in calcium copper titanate powdersen
dc.typeArtigo
dcterms.licensehttp://www.elsevier.com/about/open-access/open-access-policies/article-posting-policy
dspace.entity.typePublication
unesp.author.lattes3573363486614904
unesp.campusUniversidade Estadual Paulista (UNESP), Instituto de Química, Araraquarapt
unesp.campusUniversidade Estadual Paulista (UNESP), Faculdade de Engenharia, Guaratinguetápt
unesp.departmentMateriais e Tecnologia - FEGpt
unesp.departmentBioquímica e Tecnologia - IQARpt
unesp.departmentFísico-Química - IQARpt

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Guaratinguetá - FEG - Faculdade de Engenharia e Ciências
Araraquara - IQAR - Instituto de Química