Viscosity of fluoroindate glasses

dc.contributorUniversidade de São Paulo (USP)
dc.contributorInst. de Tecnologia do Paraná
dc.contributorUniversidade Estadual Paulista (Unesp)
dc.date.accessioned2014-05-27T11:19:39Z
dc.date.available2014-05-27T11:19:39Z
dc.date.created2014-05-27T11:19:39Z
dc.date.issued1998-12-01
dc.identifierProceedings of SPIE - The International Society for Optical Engineering, v. 3416, p. 202-205.
dc.identifier0277-786X
dc.identifierhttp://hdl.handle.net/11449/65616
dc.identifier10.1117/12.323387
dc.identifier2-s2.0-0038414856
dc.identifier2998503841917815
dc.description.abstractThe 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.
dc.languageeng
dc.relationProceedings of SPIE - The International Society for Optical Engineering
dc.rightsAcesso aberto
dc.sourceScopus
dc.subjectFluoride
dc.subjectGlass
dc.subjectIndium
dc.subjectViscosity
dc.subjectActivation energy
dc.subjectOptical fibers
dc.subjectThermal effects
dc.subjectViscous flow
dc.subjectFluoroindate glasses
dc.subjectOptical glass
dc.titleViscosity of fluoroindate glasses
dc.typeActas de congresos


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