Viscosity of fluoroindate glasses

Detalhes bibliográficos
Autor(a) principal: Costa, Bill J.
Data de Publicação: 1998
Outros Autores: Ribeiro, Sidney J.L. [UNESP], Messaddeq, Younes [UNESP]
Tipo de documento: Artigo de conferência
Idioma: eng
Título da fonte: Repositório Institucional da UNESP
Texto Completo: http://dx.doi.org/10.1117/12.323387
http://hdl.handle.net/11449/65616
Resumo: The viscosity of two fluoroindate glasses was measured as a function of temperature in the range of 310 °C - 362 °C. In such interval, the viscosity values were found to be similar to those reported for fluorozirconate glasses. The log η - 1/T plots had an unexpected behavior: two viscosity regions that seem to obey Arrhenius equation were identified and the activation energy for viscous flow (EA) for the region near Tg is smaller than the value found above the transition range. This behavior is probably due to structural changes occurred around Tg. The low values of the activation energy for viscous flow obtained for the indium fluoride-based glasses studied, suggest a good resistance against the devitrification process, what can make them suitable for fiber preparation.
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spelling Viscosity of fluoroindate glassesFluorideGlassIndiumViscosityActivation energyOptical fibersThermal effectsViscous flowFluoroindate glassesOptical glassThe viscosity of two fluoroindate glasses was measured as a function of temperature in the range of 310 °C - 362 °C. In such interval, the viscosity values were found to be similar to those reported for fluorozirconate glasses. The log η - 1/T plots had an unexpected behavior: two viscosity regions that seem to obey Arrhenius equation were identified and the activation energy for viscous flow (EA) for the region near Tg is smaller than the value found above the transition range. This behavior is probably due to structural changes occurred around Tg. The low values of the activation energy for viscous flow obtained for the indium fluoride-based glasses studied, suggest a good resistance against the devitrification process, what can make them suitable for fiber preparation.Inst. de Fisica de São Carlos USP, S. Carlos, São PauloInst. de Tecnologia do Paraná, Curitiba, ParanáInstitute de Quimica UNESP, Araraquara, São PauloInstitute de Quimica UNESP, Araraquara, São PauloUniversidade de São Paulo (USP)Inst. de Tecnologia do ParanáUniversidade Estadual Paulista (Unesp)Costa, Bill J.Ribeiro, Sidney J.L. [UNESP]Messaddeq, Younes [UNESP]2014-05-27T11:19:39Z2014-05-27T11:19:39Z1998-12-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/conferenceObject202-205http://dx.doi.org/10.1117/12.323387Proceedings of SPIE - The International Society for Optical Engineering, v. 3416, p. 202-205.0277-786Xhttp://hdl.handle.net/11449/6561610.1117/12.3233872-s2.0-00384148562998503841917815Scopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengProceedings of SPIE - The International Society for Optical Engineeringinfo:eu-repo/semantics/openAccess2021-10-23T21:41:26Zoai:repositorio.unesp.br:11449/65616Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T16:57:26.685324Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false
dc.title.none.fl_str_mv Viscosity of fluoroindate glasses
title Viscosity of fluoroindate glasses
spellingShingle Viscosity of fluoroindate glasses
Costa, Bill J.
Fluoride
Glass
Indium
Viscosity
Activation energy
Optical fibers
Thermal effects
Viscous flow
Fluoroindate glasses
Optical glass
title_short Viscosity of fluoroindate glasses
title_full Viscosity of fluoroindate glasses
title_fullStr Viscosity of fluoroindate glasses
title_full_unstemmed Viscosity of fluoroindate glasses
title_sort Viscosity of fluoroindate glasses
author Costa, Bill J.
author_facet Costa, Bill J.
Ribeiro, Sidney J.L. [UNESP]
Messaddeq, Younes [UNESP]
author_role author
author2 Ribeiro, Sidney J.L. [UNESP]
Messaddeq, Younes [UNESP]
author2_role author
author
dc.contributor.none.fl_str_mv Universidade de São Paulo (USP)
Inst. de Tecnologia do Paraná
Universidade Estadual Paulista (Unesp)
dc.contributor.author.fl_str_mv Costa, Bill J.
Ribeiro, Sidney J.L. [UNESP]
Messaddeq, Younes [UNESP]
dc.subject.por.fl_str_mv Fluoride
Glass
Indium
Viscosity
Activation energy
Optical fibers
Thermal effects
Viscous flow
Fluoroindate glasses
Optical glass
topic Fluoride
Glass
Indium
Viscosity
Activation energy
Optical fibers
Thermal effects
Viscous flow
Fluoroindate glasses
Optical glass
description The viscosity of two fluoroindate glasses was measured as a function of temperature in the range of 310 °C - 362 °C. In such interval, the viscosity values were found to be similar to those reported for fluorozirconate glasses. The log η - 1/T plots had an unexpected behavior: two viscosity regions that seem to obey Arrhenius equation were identified and the activation energy for viscous flow (EA) for the region near Tg is smaller than the value found above the transition range. This behavior is probably due to structural changes occurred around Tg. The low values of the activation energy for viscous flow obtained for the indium fluoride-based glasses studied, suggest a good resistance against the devitrification process, what can make them suitable for fiber preparation.
publishDate 1998
dc.date.none.fl_str_mv 1998-12-01
2014-05-27T11:19:39Z
2014-05-27T11:19:39Z
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/10.1117/12.323387
Proceedings of SPIE - The International Society for Optical Engineering, v. 3416, p. 202-205.
0277-786X
http://hdl.handle.net/11449/65616
10.1117/12.323387
2-s2.0-0038414856
2998503841917815
url http://dx.doi.org/10.1117/12.323387
http://hdl.handle.net/11449/65616
identifier_str_mv Proceedings of SPIE - The International Society for Optical Engineering, v. 3416, p. 202-205.
0277-786X
10.1117/12.323387
2-s2.0-0038414856
2998503841917815
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv Proceedings of SPIE - The International Society for Optical Engineering
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv 202-205
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
_version_ 1808128726667362304

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