CaTiO3 and Ca1-3xSmxTiO3: Photoluminescence and morphology as a result of Hydrothermal Microwave Methodology

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dc.contributor.authorPinatti, Ivo Mateus
dc.contributor.authorMazzo, Tatiana Martelli [UNIFESP]
dc.contributor.authorGoncalves, Rosana de Fatima [UNIFESP]
dc.contributor.authorVarela, Jose Arana
dc.contributor.authorLongo, Elson
dc.contributor.authorRosa, Ieda Lucia Viana
dc.date.accessioned2019-01-21T10:30:20Z
dc.date.available2019-01-21T10:30:20Z
dc.date.issued2016
dc.description.abstractCalcium titanate (CaTiO3 - CT) and samarium doped calcium titanate (CaTiO3:Sm3+ - CT:Sm) powders in different Sm3+ concentrations (0.5-5.0% molar ratio of Sm3+) were obtained by the Hydrothermal Microwave Methodology at 140 degrees C for 16 min. These crystals were structurally characterized by X-ray diffraction (XRD) and micro-Raman (MR) spectroscopy. Field emission scanning electron microscopy images were employed to observe the shape and size of the crystals. The optical properties were investigated by ultraviolet visible (UV Vis) absorption and photoluminescence (PL) measurements. The XRD indicated structural organization at long range while MR revealed short range order for all undoped and Sm-doped samples. Morphological analysis revealed a new cubic morphology for CT:Sm, presenting an average size of 3.0 mu m. Further, the ultraviolet visible absorption spectra indicated the existence of intermediary energy levels within the band gap. The maximum intensity PL emission occurred due to (4)G(5/2) -> H-6(7/2) and (4)G(5/2) -> H-6(9/2), transitions of Sm3+. CIE chromaticity coordinates of the samples were determined and support these materials are promising candidates for applications as phosphors in the visible orange range. This research concluded that the methodology employed here was responsible for the presence of unusual and interesting properties for these new luminescent materials. (C) 2015 Elsevier Ltd and Techna Group S.r.l. All rights reserved.en
dc.description.affiliationUniv Fed Sao Carlos, Dept Chem, LIEC, INCTMN, BR-13565905 Sao Carlos, SP, Brazil
dc.description.affiliationFed Univ Sao Paulo UNIFESP, Inst Ciencia & Engn Mar, BR-11030400 Santos, SP, Brazil
dc.description.affiliationUNIFESP Fed Univ Sao Paulo, BR-09972270 Diadema, SP, Brazil
dc.description.affiliationState Univ Sao Paulo UNESP, Inst Chem, LIEC, INCTMN, BR-14800900 Araraquara, SP, Brazil
dc.description.affiliationUnifespFed Univ Sao Paulo UNIFESP, Inst Ciencia & Engn Mar, BR-11030400 Santos, SP, Brazil
dc.description.affiliationUnifespUNIFESP Fed Univ Sao Paulo, BR-09972270 Diadema, SP, Brazil
dc.description.sourceWeb of Science
dc.description.sponsorshipConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)pt
dc.description.sponsorshipFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)pt
dc.description.sponsorshipIDCNPq: 573636/2008-7pt
dc.description.sponsorshipIDFAPESP: 2008/57872-1pt
dc.description.sponsorshipIDFAPESP: 2013/07296-2pt
dc.description.sponsorshipIDCNPq: 132320/2012-6pt
dc.format.extent1352-1360
dc.identifierhttps://dx.doi.org/10.1016/j.ceramint.2015.09.074
dc.identifier.citationCeramics International. Oxford, v. 42, n. 1 Part B, p. 1352-1360, 2016.
dc.identifier.doi10.1016/j.ceramint.2015.09.074
dc.identifier.issn0272-8842
dc.identifier.urihttps://repositorio.unifesp.br/handle/11600/49711
dc.identifier.wosWOS:000365367000043
dc.language.isoeng
dc.publisherElsevier Sci Ltd
dc.relation.ispartofCeramics International
dc.rightsinfo:eu-repo/semantics/restrictedAccess
dc.subjectHydrothermal Microwaveen
dc.subjectCalcium titanateen
dc.subjectSamariumen
dc.subjectPhotoluminescenceCalcium Titanateen
dc.subjectRaman-Spectroscopyen
dc.subjectOptical-Propertiesen
dc.subjectOrder-Disorderen
dc.subjectCrystal-Fielden
dc.subjectSm3+en
dc.subjectEmissionen
dc.subjectPerovskiteen
dc.subjectPhosphorsen
dc.subjectGlassesen
dc.titleCaTiO3 and Ca1-3xSmxTiO3: Photoluminescence and morphology as a result of Hydrothermal Microwave Methodologyen
dc.typeinfo:eu-repo/semantics/article
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