Crystallization of ZrF4-LaF3-AlF3 glasses

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dc.contributor.authorRibeiro, Sidney J.L. [UNESP]
dc.contributor.authorGoldner, Ph
dc.contributor.authorAuzel, Francois
dc.contributor.institutionFrance Telecom.
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.date.accessioned2014-05-27T11:18:16Z
dc.date.available2014-05-27T11:18:16Z
dc.date.issued1997-10-01
dc.description.abstract0.7125ZrF4-0.2375(1 - xLaF3 • xLnF3)-0.05AIF3 with x = 0.01, 0.02 and 0.03 for Ln = Er and x = 0.03 for Ln = Pr, Nd glasses were studied by differential thermal analysis (DTA), X-ray diffraction and optical spectroscopy. Avrami parameters (Ec and n) were obtained from DTA curves. With La3+ substitution a decrease in the stability against crystallization was observed. This decrease follows the order Er3+ > Nd3+ ≈ Pr3+ for 3% molar substitution. n values suggest an interface controlled growth mechanism with grain edge nucleation abler saturation. Two crystalline polymorphs of the LaZr3F15 phase were identified. With the substitution of 3 mol% of Pr3+, Nd3+ or Er3+ for La3+ only the crystallization of the rhombohedral α-LnZr3F15 phase was observed. An increase in Ω6 Judd's intensity parameter occurs with crystallization and also an increase in the 1.04 μm peak emission cross-section for Nd3+ 4I3/2 state suggesting the potential application of these glass ceramics in optical amplification devices. © 1997 Elsevier Science B.V.en
dc.description.affiliationCNET France Telecom., PO Box 107, 92225 Bagneux Cedex
dc.description.affiliationInstituto de Quimica UNESP, PO Box 355, 14801-970 Araraquara, SP
dc.description.affiliationUnespInstituto de Quimica UNESP, PO Box 355, 14801-970 Araraquara, SP
dc.format.extent176-181
dc.identifierhttp://dx.doi.org/10.1016/S0022-3093(97)00326-8
dc.identifier.citationJournal of Non-Crystalline Solids, v. 219, p. 176-181.
dc.identifier.doi10.1016/S0022-3093(97)00326-8
dc.identifier.issn0022-3093
dc.identifier.scopus2-s2.0-0031247076
dc.identifier.urihttp://hdl.handle.net/11449/65194
dc.language.isoeng
dc.relation.ispartofJournal of Non-Crystalline Solids
dc.relation.ispartofjcr2.488
dc.relation.ispartofsjr0,722
dc.rights.accessRightsAcesso restrito
dc.sourceScopus
dc.subjectComposition effects
dc.subjectCrystal growth
dc.subjectCrystallization
dc.subjectDifferential thermal analysis
dc.subjectFluorine compounds
dc.subjectInterfaces (materials)
dc.subjectLight amplifiers
dc.subjectNucleation
dc.subjectSpectroscopic analysis
dc.subjectSubstitution reactions
dc.subjectX ray crystallography
dc.subjectAvrami parameters
dc.subjectGlass ceramics
dc.subjectJudd's intensity parameters
dc.subjectOptical spectroscopy
dc.subjectGlass
dc.titleCrystallization of ZrF4-LaF3-AlF3 glassesen
dc.typeArtigo
dcterms.licensehttp://www.elsevier.com/about/open-access/open-access-policies/article-posting-policy
unesp.author.orcid0000-0003-3286-9440[1]
unesp.campusUniversidade Estadual Paulista (Unesp), Instituto de Química, Araraquarapt

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