Lead-cadmium fluorogermanate glasses and transparent glassceramics. Spectroscopy and structure
Autor(a) principal: | |
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Data de Publicação: | 2006 |
Outros Autores: | , , , , , , |
Tipo de documento: | Artigo de conferência |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.4028/www.scientific.net/MSF.514-516.1299 http://hdl.handle.net/11449/69304 |
Resumo: | In 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. |
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Lead-cadmium fluorogermanate glasses and transparent glassceramics. Spectroscopy and structure19F NMREuropiumGlass ceramicsIonic conductionLanthanidesOxyfluoride glassesVibronic spectrumCadmiumGlass transitionRelaxation processesIn 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.Instituto de Química UNESP, CP 355, CEP 14801-970, Araraquara, SPÁrea de Ciências Agro-Ambientais e Alimentos UNOESC, CP 187, CEP 89560-000, Videira, SCCEMES CNRS, 31055, Toulouse CedexDepto. de Física e Matemática UFRPE, 52171-900, Recife, PEInstituto de Física USP, CP 369, CEP 13560-970, São Carlos, SPInstituto de Química UNESP, CP 355, CEP 14801-970, Araraquara, SPUniversidade Estadual Paulista (Unesp)UNOESCCNRSUniversidade Federal Rural de Pernambuco (UFRPE)Universidade de São Paulo (USP)Ribeiro, Sidney José Lima [UNESP]Messaddeq, Younes [UNESP]Bueno, L. A.Dexpert-Ghys, J.Gouveia-Neto, A. S.Tambelli, C. C.Donoso, J. P.Magon, C.2014-05-27T11:22:04Z2014-05-27T11:22:04Z2006-12-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/conferenceObject1299-1304http://dx.doi.org/10.4028/www.scientific.net/MSF.514-516.1299Materials Science Forum, v. 514-516, n. PART 2, p. 1299-1304, 2006.0255-5476http://hdl.handle.net/11449/6930410.4028/www.scientific.net/MSF.514-516.1299WOS:0002380564002592-s2.0-37849037250644604746303465429985038419178150000-0003-3286-9440Scopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengMaterials Science Forum0,180info:eu-repo/semantics/openAccess2021-10-23T21:44:17Zoai:repositorio.unesp.br:11449/69304Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462021-10-23T21:44:17Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Lead-cadmium fluorogermanate glasses and transparent glassceramics. Spectroscopy and structure |
title |
Lead-cadmium fluorogermanate glasses and transparent glassceramics. Spectroscopy and structure |
spellingShingle |
Lead-cadmium fluorogermanate glasses and transparent glassceramics. Spectroscopy and structure Ribeiro, Sidney José Lima [UNESP] 19F NMR Europium Glass ceramics Ionic conduction Lanthanides Oxyfluoride glasses Vibronic spectrum Cadmium Glass transition Relaxation processes |
title_short |
Lead-cadmium fluorogermanate glasses and transparent glassceramics. Spectroscopy and structure |
title_full |
Lead-cadmium fluorogermanate glasses and transparent glassceramics. Spectroscopy and structure |
title_fullStr |
Lead-cadmium fluorogermanate glasses and transparent glassceramics. Spectroscopy and structure |
title_full_unstemmed |
Lead-cadmium fluorogermanate glasses and transparent glassceramics. Spectroscopy and structure |
title_sort |
Lead-cadmium fluorogermanate glasses and transparent glassceramics. Spectroscopy and structure |
author |
Ribeiro, Sidney José Lima [UNESP] |
author_facet |
Ribeiro, Sidney José Lima [UNESP] Messaddeq, Younes [UNESP] Bueno, L. A. Dexpert-Ghys, J. Gouveia-Neto, A. S. Tambelli, C. C. Donoso, J. P. Magon, C. |
author_role |
author |
author2 |
Messaddeq, Younes [UNESP] Bueno, L. A. Dexpert-Ghys, J. Gouveia-Neto, A. S. Tambelli, C. C. Donoso, J. P. Magon, C. |
author2_role |
author author author author author author author |
dc.contributor.none.fl_str_mv |
Universidade Estadual Paulista (Unesp) UNOESC CNRS Universidade Federal Rural de Pernambuco (UFRPE) Universidade de São Paulo (USP) |
dc.contributor.author.fl_str_mv |
Ribeiro, Sidney José Lima [UNESP] Messaddeq, Younes [UNESP] Bueno, L. A. Dexpert-Ghys, J. Gouveia-Neto, A. S. Tambelli, C. C. Donoso, J. P. Magon, C. |
dc.subject.por.fl_str_mv |
19F NMR Europium Glass ceramics Ionic conduction Lanthanides Oxyfluoride glasses Vibronic spectrum Cadmium Glass transition Relaxation processes |
topic |
19F NMR Europium Glass ceramics Ionic conduction Lanthanides Oxyfluoride glasses Vibronic spectrum Cadmium Glass transition Relaxation processes |
description |
In 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. |
publishDate |
2006 |
dc.date.none.fl_str_mv |
2006-12-01 2014-05-27T11:22:04Z 2014-05-27T11:22:04Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/conferenceObject |
format |
conferenceObject |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://dx.doi.org/10.4028/www.scientific.net/MSF.514-516.1299 Materials Science Forum, v. 514-516, n. PART 2, p. 1299-1304, 2006. 0255-5476 http://hdl.handle.net/11449/69304 10.4028/www.scientific.net/MSF.514-516.1299 WOS:000238056400259 2-s2.0-37849037250 6446047463034654 2998503841917815 0000-0003-3286-9440 |
url |
http://dx.doi.org/10.4028/www.scientific.net/MSF.514-516.1299 http://hdl.handle.net/11449/69304 |
identifier_str_mv |
Materials Science Forum, v. 514-516, n. PART 2, p. 1299-1304, 2006. 0255-5476 10.4028/www.scientific.net/MSF.514-516.1299 WOS:000238056400259 2-s2.0-37849037250 6446047463034654 2998503841917815 0000-0003-3286-9440 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Materials Science Forum 0,180 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
1299-1304 |
dc.source.none.fl_str_mv |
Scopus reponame:Repositório Institucional da UNESP instname:Universidade Estadual Paulista (UNESP) instacron:UNESP |
instname_str |
Universidade Estadual Paulista (UNESP) |
instacron_str |
UNESP |
institution |
UNESP |
reponame_str |
Repositório Institucional da UNESP |
collection |
Repositório Institucional da UNESP |
repository.name.fl_str_mv |
Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP) |
repository.mail.fl_str_mv |
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