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dc.contributor.authorGomes Vieira, Fagner Ticiano-
dc.contributor.authorMelo, Danniely Silva-
dc.contributor.authorGuedes de Lima, Severino Jackson-
dc.contributor.authorLongo, Elson-
dc.contributor.authorPaskocimas, Carlos Alberto-
dc.contributor.authorSilva Junior, Wilson-
dc.contributor.authorde Souza, Antonio Gouveia-
dc.contributor.authorGarcia dos Santos, Ieda Maria-
dc.date.accessioned2014-05-20T15:30:20Z-
dc.date.accessioned2016-10-25T18:05:49Z-
dc.date.available2014-05-20T15:30:20Z-
dc.date.available2016-10-25T18:05:49Z-
dc.date.issued2009-05-06-
dc.identifierhttp://dx.doi.org/10.1016/j.materresbull.2008.10.007-
dc.identifier.citationMaterials Research Bulletin. Oxford: Pergamon-Elsevier B.V. Ltd, v. 44, n. 5, p. 1086-1092, 2009.-
dc.identifier.issn0025-5408-
dc.identifier.urihttp://hdl.handle.net/11449/39746-
dc.identifier.urihttp://acervodigital.unesp.br/handle/11449/39746-
dc.description.abstractTiO2:Cr brown pigments were prepared via a polymeric precursor derived from the Pechini method. The pigments were analyzed by infrared spectroscopy, X-ray diffraction, ultraviolet-vis spectroscopy, and colorimetry. The increase of the calcination temperature from 700 to 1000 degrees C led to a decrease in the L* values, corresponding to darkening of the pigments. The pigments obtained in this work are darker than those produced by a solid-state reaction method reported before. The change in the pigment color is due to the anatase-rutile phase transition, which leads to a shift in the charge transfer bond (Ti4+ - O2-) due to a change in the crystal field around the chromophore ions. Moreover, the oxidation state of chromium was observed to change, and this also alters the color of the pigments. (C) 2008 Elsevier Ltd. All rights reserved.en
dc.description.sponsorshipCT-PETRO-
dc.description.sponsorshipCoordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)-
dc.description.sponsorshipConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)-
dc.description.sponsorshipFinanciadora de Estudos e Projetos (FINEP)-
dc.description.sponsorshipPetrobras-
dc.format.extent1086-1092-
dc.language.isoeng-
dc.publisherPergamon-Elsevier B.V. Ltd-
dc.sourceWeb of Science-
dc.subjectOxidesen
dc.subjectChemical synthesisen
dc.subjectCrystal structureen
dc.subjectDefectsen
dc.subjectColor centersen
dc.titleThe influence of temperature on the color of TiO2:Cr pigmentsen
dc.typeoutro-
dc.contributor.institutionUniversidade Federal da Paraíba (UFPB)-
dc.contributor.institutionUniversidade Estadual Paulista (UNESP)-
dc.contributor.institutionUniversidade Federal do Rio Grande do Norte (UFRN)-
dc.contributor.institutionUniversidade de São Paulo (USP)-
dc.description.affiliationUniversidade Federal da Paraíba (UFPB), Ctr Ciencias Exatas & Nat, Dept Quim, LACOM, BR-58059900 Joao Pessoa, Paraiba, Brazil-
dc.description.affiliationUniversidade Federal da Paraíba (UFPB), Dept Engn Mecan, LSR, BR-58059900 Joao Pessoa, Paraiba, Brazil-
dc.description.affiliationUniv Estadual Paulista, Inst Quim, CMDMC LIEC, Araraquara, SP, Brazil-
dc.description.affiliationUniversidade Federal do Rio Grande do Norte (UFRN), Dept Engn Mecan, BR-59072970 Natal, RN, Brazil-
dc.description.affiliationIcra Prod Ceram, Mogi Guacu, SP, Brazil-
dc.description.affiliationUnespUniv Estadual Paulista, Inst Quim, CMDMC LIEC, Araraquara, SP, Brazil-
dc.identifier.doi10.1016/j.materresbull.2008.10.007-
dc.identifier.wosWOS:000264969200024-
dc.rights.accessRightsAcesso restrito-
dc.relation.ispartofMaterials Research Bulletin-
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