Viscosity of fluoroindate glasses

B. J. Costa; Sidney J. L. Ribeiro; Younes Messaddeq

doi:10.1117/12.323387

28 September 1998 Viscosity of fluoroindate glasses

B. J. Costa, Sidney J. L. Ribeiro, Younes Messaddeq

Proceedings Volume 3416, Infrared Glass Optical Fibers and Their Applications; (1998) https://doi.org/10.1117/12.323387
Event: Lasers and Materials in Industry and Opto-Contact Workshop, 1998, Quebec, Canada

Abstract

The viscosity of two fluoroindate glasses was measured as a function of temperature in the range of 310 degrees C - 362 degrees C. In such interval,the viscosity values were found to be similar to those reported for fluorozirconate glasses. The log (eta) - 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 for the region near T_g is smaller than the value found above the transition range. This behavior is probably due to structural changes occurred around T_g. The low values of the activation energy for viscous flow obtained for the indium fluoride-based glasses studied, suggests a good resistance against the devitrification process, what can make them suitable for fiber preparation.

Citation Download Citation

B. J. Costa, Sidney J. L. Ribeiro, and Younes Messaddeq "Viscosity of fluoroindate glasses", Proc. SPIE 3416, Infrared Glass Optical Fibers and Their Applications, (28 September 1998); https://doi.org/10.1117/12.323387

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