Synthesis, structural refinement and optical behavior of CaTiO3 powders: A comparative study of processing in different furnaces

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dc.contributor.authorCavalcante, L. S.
dc.contributor.authorMarques, V. S.
dc.contributor.authorSczancoski, J. C.
dc.contributor.authorEscote, M. T.
dc.contributor.authorJoya, M. R.
dc.contributor.authorVarela, José Arana [UNESP]
dc.contributor.authorSantos, M. R. M. C.
dc.contributor.authorPizani, P. S.
dc.contributor.authorLongo, Elson [UNESP]
dc.contributor.institutionUniversidade Federal de São Carlos (UFSCar)
dc.contributor.institutionUniversidade Federal do Piauí (UFPI)
dc.contributor.institutionUniversidade Federal do ABC (UFABC)
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.date.accessioned2014-05-20T15:30:31Z
dc.date.available2014-05-20T15:30:31Z
dc.date.issued2008-09-15
dc.description.abstractCalcium titanate (CaTiO3) powders were synthesized by the polymeric precursor method and processed in different furnaces. The structural evolution of CaTiO3 powders heat treated in conventional furnace and adapted domestic microwave oven was analyzed by X-ray diffraction (XRD), micro-Raman scattering (MRS) spectroscopy and ultraviolet-visible (UV-vis) absorption spectroscopy. XRD, MRS and Rietveld refinement revealed that the CaTiO3 powders heat treated in both furnaces are free of deleterious phases and crystallize in an orthorhombic structure. UV-vis measurements suggested the presence of intermediary energy levels into the optical band gap of structurally disordered CaTiO3 powders. CaTiO3 powders heat treated in microwave oven showed a rapid structural organization than powders heat treated in conventional furnace. The optical absorption values revealed a different behavior due to the changes in the structural order-disorder degree of the CaTiO3 lattice. The differences verified in the heating process of CaTiO3 powders processed in conventional furnace and adapted domestic microwave oven were discussed. (c) 2008 Elsevier B.V. All rights reserved.en
dc.description.affiliationUniversidade Federal de São Carlos (UFSCar), LIEC, Dept Quim & Fis, BR-13565905 São Carlos, SP, Brazil
dc.description.affiliationUniv Fed Piaui, Dept Quim, Ctr Ciencias Nat, Teresina, PI, Brazil
dc.description.affiliationUniversidade Federal do ABC (UFABC), Ctr Engn Modelagem & Ciencias Sociais Aplicadas, Santo Andre, SP, Brazil
dc.description.affiliationUniv Estadual Paulista, LIEC IQ, BR-14801907 Araraquara, SP, Brazil
dc.description.affiliationUnespUniv Estadual Paulista, LIEC IQ, BR-14801907 Araraquara, SP, Brazil
dc.description.sponsorshipCoordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
dc.description.sponsorshipConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.description.sponsorshipFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.format.extent299-307
dc.identifierhttp://dx.doi.org/10.1016/j.cej.2008.05.017
dc.identifier.citationChemical Engineering Journal. Lausanne: Elsevier B.V. Sa, v. 143, n. 1-3, p. 299-307, 2008.
dc.identifier.doi10.1016/j.cej.2008.05.017
dc.identifier.issn1385-8947
dc.identifier.urihttp://hdl.handle.net/11449/39875
dc.identifier.wosWOS:000259850800035
dc.language.isoeng
dc.publisherElsevier B.V. Sa
dc.relation.ispartofChemical Engineering Journal
dc.relation.ispartofjcr6.735
dc.relation.ispartofsjr1,863
dc.rights.accessRightsAcesso restrito
dc.sourceWeb of Science
dc.subjectCaTiO3en
dc.subjectoptical materialsen
dc.subjectheat treatmenten
dc.subjectRietveld refinementen
dc.subjectmicrowave effectsen
dc.titleSynthesis, structural refinement and optical behavior of CaTiO3 powders: A comparative study of processing in different furnacesen
dc.typeArtigo
dcterms.licensehttp://www.elsevier.com/about/open-access/open-access-policies/article-posting-policy
dcterms.rightsHolderElsevier B.V. Sa
unesp.campusUniversidade Estadual Paulista (Unesp), Instituto de Química, Araraquarapt

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