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Please use this identifier to cite or link to this item: http://acervodigital.unesp.br/handle/11449/41948
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dc.contributor.authorFerri, E. A. V.-
dc.contributor.authorSczancoski, J. C.-
dc.contributor.authorCavalcante, L. S.-
dc.contributor.authorParis, E. C.-
dc.contributor.authorEspinosa, J. W. M.-
dc.contributor.authorde Figueiredo, A. T.-
dc.contributor.authorPizani, P. S.-
dc.contributor.authorMastelaro, V. R.-
dc.contributor.authorVarela, José Arana-
dc.contributor.authorLongo, Elson-
dc.date.accessioned2014-05-20T15:33:16Z-
dc.date.accessioned2016-10-25T18:09:48Z-
dc.date.available2014-05-20T15:33:16Z-
dc.date.available2016-10-25T18:09:48Z-
dc.date.issued2009-09-15-
dc.identifierhttp://dx.doi.org/10.1016/j.matchemphys.2009.05.042-
dc.identifier.citationMaterials Chemistry and Physics. Lausanne: Elsevier B.V. Sa, v. 117, n. 1, p. 192-198, 2009.-
dc.identifier.issn0254-0584-
dc.identifier.urihttp://hdl.handle.net/11449/41948-
dc.identifier.urihttp://acervodigital.unesp.br/handle/11449/41948-
dc.description.abstractMgTiO3 powders were prepared by the complex polymerization method and heat treated at different temperatures for 2 h. These powders were analyzed by X-ray diffraction (XRD), Rietveld refinements, micro-Raman (MR) spectroscopy, X-ray absorption near edge spectroscopy (XANES), ultraviolet-visible (UV-vis) absorption spectroscopy and photoluminescence (PL) measurements. XRD patterns and MR spectra showed that the crystalline powders have a rhombohedral structure. XANES spectra indicated that the local structure of crystalline MgTiO3 powders is composed only by [TiO6] clusters, while the disordered exhibit the simultaneous presence of both [TiO5]and [TiO6] complex clusters into the lattice. UV-vis spectra revealed different optical band gap values as a function of heat treatment temperature. This result can be an indicative of intermediary energy levels within the band gap of this material because of structural defects into the perovskite-type structure. PL behavior was attributed to the structural order-disorder and/or distortions on the [TiO6]-[TiO6] complex clusters. (c) 2009 Elsevier B.V. All rights reserved.en
dc.description.sponsorshipCoordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)-
dc.description.sponsorshipConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)-
dc.description.sponsorshipEAPESP-
dc.description.sponsorshipLaboratório Nacional de Luz Síncrotron (LNLS)-
dc.format.extent192-198-
dc.language.isoeng-
dc.publisherElsevier B.V. Sa-
dc.sourceWeb of Science-
dc.subjectOptical materialsen
dc.subjectChemical synthesisen
dc.subjectXAFSen
dc.subjectLuminescenceen
dc.titlePhotoluminescence behavior in MgTiO3 powders with vacancy/distorted clusters and octahedral tiltingen
dc.typeoutro-
dc.contributor.institutionUniversidade Federal de São Carlos (UFSCar)-
dc.contributor.institutionUniversidade Estadual Paulista (UNESP)-
dc.contributor.institutionUniversidade de São Paulo (USP)-
dc.description.affiliationUniversidade Federal de São Carlos (UFSCar), BR-13565905 São Carlos, SP, Brazil-
dc.description.affiliationUniv Estadual Paulista, LIEC IQ, BR-14801970 Araraquara, SP, Brazil-
dc.description.affiliationIFSC USP, BR-13560970 São Carlos, SP, Brazil-
dc.description.affiliationUnespUniv Estadual Paulista, LIEC IQ, BR-14801970 Araraquara, SP, Brazil-
dc.description.sponsorshipIdLNLS: D04B - XAFS1 - 8050-
dc.identifier.doi10.1016/j.matchemphys.2009.05.042-
dc.identifier.wosWOS:000269291500036-
dc.rights.accessRightsAcesso restrito-
dc.relation.ispartofMaterials Chemistry and Physics-
Appears in Collections:Artigos, TCCs, Teses e Dissertações da Unesp

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