Lead-cadmium fluorogermanate glasses and transparent glassceramics. Spectroscopy and structure

dc.contributorUniversidade Estadual Paulista (UNESP)
dc.creatorRibeiro, Sidney José Lima
dc.creatorMessaddeq, Younes
dc.creatorBueno, L. A.
dc.creatorDexpert-Ghys, J.
dc.creatorGouveia-Neto, A. S.
dc.creatorTambelli, C. C.
dc.creatorDonoso, J. P.
dc.creatorMagon, C.
dc.date2014-05-27T11:22:04Z
dc.date2016-10-25T18:23:07Z
dc.date2014-05-27T11:22:04Z
dc.date2016-10-25T18:23:07Z
dc.date2006-12-01
dc.date.accessioned2017-04-06T01:22:05Z
dc.date.available2017-04-06T01:22:05Z
dc.identifierMaterials Science Forum, v. 514-516, n. PART 2, p. 1299-1304, 2006.
dc.identifier0255-5476
dc.identifierhttp://hdl.handle.net/11449/69304
dc.identifierhttp://acervodigital.unesp.br/handle/11449/69304
dc.identifier10.4028/www.scientific.net/MSF.514-516.1299
dc.identifierWOS:000238056400259
dc.identifier2-s2.0-37849037250
dc.identifierhttp://dx.doi.org/10.4028/www.scientific.net/MSF.514-516.1299
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/890564
dc.descriptionIn Lead-cadmium fluorogermanate glasses (PbF2-CdF 2-PbGeO3) the addition of metal fluorides to the base PbGeO3 glass leads to a decrease of the glass transition temperature (Tg) and to an enhancement of the ionic conductivity properties. Based on different spectroscopic techniques (19F NMR, Ge K-edge X-ryas absorption and Raman scattering) an heterogeneous glass structure is proposed at the molecular scale, which can be described by fluoride rich regions permeating the metagermanate chains. The temperature dependence of the 19F NMR lineshapes and relaxation times exhibits the qualitative and quantitative features associated with the high fluoride mobility in these systems. Eu 3+ emission and vibronic spectra are used to follow the crystallization process leading to transparent glass ceramics.
dc.languageeng
dc.relationMaterials Science Forum
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.subject19F NMR
dc.subjectEuropium
dc.subjectGlass ceramics
dc.subjectIonic conduction
dc.subjectLanthanides
dc.subjectOxyfluoride glasses
dc.subjectVibronic spectrum
dc.subjectCadmium
dc.subjectGlass transition
dc.subjectRelaxation processes
dc.titleLead-cadmium fluorogermanate glasses and transparent glassceramics. Spectroscopy and structure
dc.typeOtro


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