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Cr3+ and Cr4+ luminescence in glass ceramic silica

dc.contributor.authorMartines, Marco A. U. [UNESP]
dc.contributor.authorDavolos, Marian Rosaly [UNESP]
dc.contributor.authorJafelicci, Miguel [UNESP]
dc.contributor.authorde Souza, Dione F.
dc.contributor.authorNunes, Luiz A. O.
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.contributor.institutionUniversidade de São Paulo (USP)
dc.date.accessioned2014-05-20T15:31:03Z
dc.date.available2014-05-20T15:31:03Z
dc.date.issued2008-11-01
dc.description.abstractThis paper reports on the effect of glass ceramic silica matrix on [CrO4](4-) and Cr2O3 NIR and visible luminescence. Chromium-containing silica was obtained by precipitation from water-glass and chromium nitrate acid solution with thermal treatment at 1000 degrees C. From XRD results silica and silica-chromium samples are crystalline. The chromium emission spectrum presents two main broad bands: one in the NIR region (1.1-1.7 mu m) and other in the visible region (0.6-0.7 mu m) assigned to Cr4+ and to Cr3+, respectively. This thermal treated glass ceramic silica-chromium sample stabilizes the [CrO4](4-) where Cr4+ substitutes for Si4+ and also hexacoordinated Cr3+ group probably as segregated phase in the system. It can be pointed out that luminescence spectroscopy is a powerful toot for detecting the two chromium optical centers in the glass ceramic silica. (C) 2008 Elsevier B.V. All rights reserved.en
dc.description.affiliationUNESP, Inst Quim, BR-14801970 Araraquara, SP, Brazil
dc.description.affiliationUniv São Paulo, Inst Fis, BR-13560970 São Carlos, SP, Brazil
dc.description.affiliationUnespUNESP, Inst Quim, BR-14801970 Araraquara, SP, Brazil
dc.description.sponsorshipCoordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
dc.description.sponsorshipFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.description.sponsorshipConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.format.extent1787-1790
dc.identifierhttp://dx.doi.org/10.1016/j.jlumin.2008.04.011
dc.identifier.citationJournal of Luminescence. Amsterdam: Elsevier B.V., v. 128, n. 11, p. 1787-1790, 2008.
dc.identifier.doi10.1016/j.jlumin.2008.04.011
dc.identifier.issn0022-2313
dc.identifier.lattes4284809342546287
dc.identifier.urihttp://hdl.handle.net/11449/40295
dc.identifier.wosWOS:000259158500010
dc.language.isoeng
dc.publisherElsevier B.V.
dc.relation.ispartofJournal of Luminescence
dc.relation.ispartofjcr2.732
dc.relation.ispartofsjr0,694
dc.rights.accessRightsAcesso restritopt
dc.sourceWeb of Science
dc.subjectsilicaen
dc.subjectChromium(III) and (IV)en
dc.subjectVIS and NIR luminescenceen
dc.titleCr3+ and Cr4+ luminescence in glass ceramic silicaen
dc.typeArtigopt
dcterms.licensehttp://www.elsevier.com/about/open-access/open-access-policies/article-posting-policy
dcterms.rightsHolderElsevier B.V.
dspace.entity.typePublication
relation.isOrgUnitOfPublicationbc74a1ce-4c4c-4dad-8378-83962d76c4fd
relation.isOrgUnitOfPublication.latestForDiscoverybc74a1ce-4c4c-4dad-8378-83962d76c4fd
unesp.author.lattes4284809342546287
unesp.author.orcid0000-0001-8326-1465[2]
unesp.campusUniversidade Estadual Paulista (UNESP), Instituto de Química, Araraquarapt
unesp.departmentQuímica Inorgânica - IQARpt

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