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Please use this identifier to cite or link to this item: http://acervodigital.unesp.br/handle/11449/134546
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dc.contributor.authorTrindade, Neilo M.-
dc.contributor.authorScalvi, Rosa M. F.-
dc.contributor.authorScalvi, Luis Vicente de Andrade-
dc.date.accessioned2016-03-02T12:57:19Z-
dc.date.accessioned2016-10-25T21:30:38Z-
dc.date.available2016-03-02T12:57:19Z-
dc.date.available2016-10-25T21:30:38Z-
dc.date.issued2010-
dc.identifierhttp://dx.doi.org/10.4236/epe.2010.21004-
dc.identifier.citationEnergy and Power Engineering, v. 2, n. 2, p. 18-24, 2010.-
dc.identifier.issn1947-3818-
dc.identifier.urihttp://hdl.handle.net/11449/134546-
dc.identifier.urihttp://acervodigital.unesp.br/handle/11449/134546-
dc.description.abstractIn order to investigate optical properties of alexandrite, the present work deals with the influence of thermal annealing on optical absorption and luminescence spectra of natural samples. The exposure time to heat treatment at 1000o C is taken into account. Possible migration of Cr3+ ions from Al1 (inversion site) to Al2 (reflection site) is detected. Sample composition is obtained through Scanning Electron Microscopy (SEM) measurements and points to a rearrangement of Cr+3 and Fe3+ ions in the alexandrite crystalline structure, under thermal annealing influence. This feature may be used to control the optical properties of natural alexandrite, which can be associated to the observed laser emission effect.en
dc.description.sponsorshipFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)-
dc.description.sponsorshipConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)-
dc.description.sponsorshipFundação para o Desenvolvimento da UNESP (FUNDUNESP)-
dc.description.sponsorshipCoordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)-
dc.format.extent18-24-
dc.language.isoeng-
dc.sourceCurrículo Lattes-
dc.subjectA. oxidesen
dc.subjectD. optical propertiesen
dc.subjectD. defectsen
dc.titleCr+3 distribution in Al1 and Al2 Sites of alexandrite (BeAl2O4: Cr3+) induced by annealing, investigated by optical spectroscopyen
dc.typeoutro-
dc.contributor.institutionUniversidade Estadual Paulista (UNESP)-
dc.description.affiliationUniversidade Estadual Paulista Júlio de Mesquita Filho, Departamento de Física, Faculdade de Ciências de Bauru, Bauru, Av. Luiz Edmundo Carrijo Coube 14-01, Vargem Limpa, CEP 17033360, SP, Brasil-
dc.description.affiliationUnespUniversidade Estadual Paulista Júlio de Mesquita Filho, Departamento de Física, Faculdade de Ciências de Bauru, Bauru, Av. Luiz Edmundo Carrijo Coube 14-01, Vargem Limpa, CEP 17033360, SP, Brasil-
dc.identifier.doi10.4236/epe.2010.21004-
dc.rights.accessRightsAcesso restrito-
dc.relation.ispartofEnergy and Power Engineering-
dc.identifier.lattes7730719476451232-
dc.identifier.lattes1009746638524690-
dc.identifier.lattes0492600439402115-
Appears in Collections:Artigos, TCCs, Teses e Dissertações da Unesp

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