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Structural characterization of phase transition of Al2O3 nanopowders obtained by polymeric precursor method

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dc.contributor.authorCava, S.
dc.contributor.authorTebcherani, S. M.
dc.contributor.authorSouza, I. A.
dc.contributor.authorPianaro, S. A.
dc.contributor.authorPaskocimas, C. A.
dc.contributor.authorLongo, Elson [UNESP]
dc.contributor.authorVarela, José Arana [UNESP]
dc.contributor.institutionUniv Estadual de Ponta Grossa
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.contributor.institutionUniversidade Federal do Rio Grande do Norte (UFRN)
dc.date.accessioned2014-05-20T14:17:57Z
dc.date.available2014-05-20T14:17:57Z
dc.date.issued2007-06-15
dc.description.abstractNanocrystalline Al(2)O(3)powders have been synthesized by the polymeric precursor method. A study of the evolution of crystalline phases of obtained powders was accomplished through X-ray diffraction, micro-Raman spectroscopy and refinement of the structures through the Rietveld method. The results obtained allow the identification of three steps on the gamma-Al2O3 to alpha-Al2O3 phase transition. The single-phase alpha-Al2O3 Powder was obtained after heat-treatment at 1050 degrees C for 2 h. A study of the morphology of the particles was accomplished through measures of crystallite size, specific surface area and transmission electronic microscopy. The particle size is closely related to gamma-Al2O3 to alpha-Al2O3 phase transition. (c) 2007 Elsevier B.V. All rights reserved.en
dc.description.affiliationUniv Estadual de Ponta Grossa, Lab Interdisciplinar Mat Ceram, Ctr Interdisciplinar Pesquisa & Posgraduacao, BR-84035900 Ponta Grossa, PR, Brazil
dc.description.affiliationUniv Estadual Paulista, Lab Interdisciplinar Ceram, Dept Quim Fis, Inst Quim, Araraquara, SP, Brazil
dc.description.affiliationUniv Fed Rio Grande do Norte, Dept Eng Mecan, BR-59072970 Natal, RN, Brazil
dc.description.affiliationUnespUniv Estadual Paulista, Lab Interdisciplinar Ceram, Dept Quim Fis, Inst Quim, Araraquara, SP, Brazil
dc.format.extent394-399
dc.identifierhttp://dx.doi.org/10.1016/j.matchemphys.2007.02.046
dc.identifier.citationMaterials Chemistry and Physics. Lausanne: Elsevier B.V. Sa, v. 103, n. 2-3, p. 394-399, 2007.
dc.identifier.doi10.1016/j.matchemphys.2007.02.046
dc.identifier.issn0254-0584
dc.identifier.urihttp://hdl.handle.net/11449/25388
dc.identifier.wosWOS:000247715300032
dc.language.isoeng
dc.publisherElsevier B.V.
dc.relation.ispartofMaterials Chemistry and Physics
dc.relation.ispartofjcr2.210
dc.relation.ispartofsjr0,615
dc.rights.accessRightsAcesso restritopt
dc.sourceWeb of Science
dc.subjectAl2O3pt
dc.subjectphase transitionpt
dc.subjectpolymeric precursor methodpt
dc.subjectnanopowderspt
dc.subjectmicro-Raman spectroscopypt
dc.subjectcrystallite sizept
dc.titleStructural characterization of phase transition of Al2O3 nanopowders obtained by polymeric precursor methoden
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.campusUniversidade Estadual Paulista (UNESP), Instituto de Química, Araraquarapt
unesp.departmentFísico-Química - IQARpt

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Araraquara - IQAR - Instituto de Química