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dc.contributor.authorAraujo, E. B. [UNESP]
dc.contributor.authorIdalgo, E. [UNESP]
dc.contributor.authorMoraes, A. P. A.
dc.contributor.authorSouza Filho, A. G.
dc.contributor.authorMendes Filho, J.
dc.date.accessioned2014-05-20T13:29:50Z
dc.date.available2014-05-20T13:29:50Z
dc.date.issued2009-07-01
dc.identifierhttp://dx.doi.org/10.1016/j.materresbull.2009.01.019
dc.identifier.citationMaterials Research Bulletin. Oxford: Pergamon-Elsevier B.V. Ltd, v. 44, n. 7, p. 1596-1600, 2009.
dc.identifier.issn0025-5408
dc.identifier.urihttp://hdl.handle.net/11449/10112
dc.description.abstractIn this work, X-ray diffraction, Raman spectroscopy and differential scanning calorimetry techniques were used to understand the crystallization process on 20Li(2)O-80TeO(2) glass. X-ray diffraction results reveal the presence of three distinct alpha gamma-TeO2, alpha-TeO2 and alpha-Li2Te2O5 crystalline phases in the glass matrix. The Raman spectroscopy band structure of this glass is similar to the one observed in glassy TeO2, Raman results clearly reveal the metastable character of the gamma-TeO2 phase in the 20Li(2)O-80TeO(2) glass, whose associated vibration modes disappear completely at temperatures higher than 315 degrees C. on the other hand, the Raman modes associated to alpha-TeO2 and alpha-Li2Te2O5 phases persists up to temperatures close to the final stages of the crystallization in the studied glass (around 420 degrees C). From DSC measurements, the activation energies 296 +/- 3 and 298 +/- 1 kJ mol(-1) were associated to gamma-TeO2 and alpha-TeO2 phases crystallization, indicating that these phases crystallizes at temperatures very close in the studied glass. (C) 2009 Elsevier Ltd. All rights reserved.en
dc.description.sponsorshipConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.description.sponsorshipCoordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
dc.description.sponsorshipFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.format.extent1596-1600
dc.language.isoeng
dc.publisherPergamon-Elsevier B.V. Ltd
dc.relation.ispartofMaterials Research Bulletin
dc.sourceWeb of Science
dc.subjectRaman spectroscopyen
dc.subjectX-ray diffractionen
dc.titleCrystallization kinetics and thermal properties of 20Li(2)O-80TeO(2) glassen
dc.typeArtigo
dcterms.licensehttp://www.elsevier.com/about/open-access/open-access-policies/article-posting-policy
dcterms.rightsHolderPergamon-Elsevier B.V. Ltd
dc.contributor.institutionUniversidade Estadual Paulista (UNESP)
dc.contributor.institutionUniversidade Federal do Ceará (UFC)
dc.description.affiliationUniv Estadual Paulista, Dept Fis & Quim, BR-15385000 Ilha Solteira, SP, Brazil
dc.description.affiliationUniversidade Federal do Ceará (UFC), Dept Fis, BR-60455900 Fortaleza, Ceara, Brazil
dc.description.affiliationUnespUniv Estadual Paulista, Dept Fis & Quim, BR-15385000 Ilha Solteira, SP, Brazil
dc.identifier.doi10.1016/j.materresbull.2009.01.019
dc.identifier.wosWOS:000266852500026
dc.rights.accessRightsAcesso restrito
unesp.campusUniversidade Estadual Paulista (UNESP), Faculdade de Engenharia, Ilha Solteirapt
dc.identifier.lattes6725982228402054
unesp.author.lattes6725982228402054
dc.relation.ispartofjcr2.873
dc.relation.ispartofsjr0,746
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