Differential scanning calorimetry, x-ray diffraction and F-19 nuclear magnetic resonance investigations of the crystallization of InF3-based glasses

dc.contributorUniversidade Estadual Paulista (UNESP)
dc.creatorFranco, RWA
dc.creatorTambelli, C. C.
dc.creatorMagon, C. J.
dc.creatorDonoso, J. P.
dc.creatorMessaddeq, Younes
dc.creatorRibeiro, SJL
dc.creatorPoulain, M.
dc.date2014-05-20T15:29:40Z
dc.date2016-10-25T18:04:55Z
dc.date2014-05-20T15:29:40Z
dc.date2016-10-25T18:04:55Z
dc.date1998-08-08
dc.date.accessioned2017-04-06T00:12:56Z
dc.date.available2017-04-06T00:12:56Z
dc.identifierJournal of Chemical Physics. Woodbury: Amer Inst Physics, v. 109, n. 6, p. 2432-2436, 1998.
dc.identifier0021-9606
dc.identifierhttp://hdl.handle.net/11449/39194
dc.identifierhttp://acervodigital.unesp.br/handle/11449/39194
dc.identifier10.1063/1.476812
dc.identifierWOS:000075237100047
dc.identifierWOS000075237100047.pdf
dc.identifierhttp://dx.doi.org/10.1063/1.476812
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/882135
dc.descriptionResults of differential scanning calometry (DSC), x-ray diffraction (XRD), and F-19 nuclear magnetic resonance (NMR) of InF3-based glasses, treated at different temperatures, ranging from glass transition temperature (T-g) to crystallization temperature (T-c), are reported. The main features of the experimental results are as follows. DSC analysis emphasizes several steps in the crystallization process. Heat treatment at temperatures above T-g enhances the nucleation of the first growing phases but has little influence on the following ones. XRD results show that several crystalline phases are formed, with solid state transitions when heated above 680 K, the F-19 NMR results show that the spin-lattice relaxation, for the glass samples heat treated above 638 K, is described by two time constants. For samples treated below this temperature a single time constant T-1 was observed. Measurements of the F-19 spin-lattice relaxation time (T-1), as a function of temperature,made possible the identification of the mobile fluoride ions. The activation energy, for the ionic motion, in samples treated at crystallization temperature was found to be 0.18 +/- 0.01 eV. (C) 1998 American Institute of Physics.
dc.languageeng
dc.publisherAmerican Institute of Physics (AIP)
dc.relationJournal of Chemical Physics
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.titleDifferential scanning calorimetry, x-ray diffraction and F-19 nuclear magnetic resonance investigations of the crystallization of InF3-based glasses
dc.typeOtro


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