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dc.contributor.authorRibeiro, Sidney J.L.-
dc.contributor.authorGoldner, Ph-
dc.contributor.authorAuzel, Francois-
dc.identifier.citationJournal of Non-Crystalline Solids, v. 219, p. 176-181.-
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.subjectComposition effects-
dc.subjectCrystal growth-
dc.subjectDifferential thermal analysis-
dc.subjectFluorine compounds-
dc.subjectInterfaces (materials)-
dc.subjectLight amplifiers-
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.titleCrystallization of ZrF4-LaF3-AlF3 glassesen
dc.contributor.institutionFrance Telecom.-
dc.contributor.institutionUniversidade Estadual Paulista (UNESP)-
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.rights.accessRightsAcesso restrito-
dc.relation.ispartofJournal of Non-Crystalline Solids-
Appears in Collections:Artigos, TCCs, Teses e Dissertações da Unesp

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