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Proceedings Paper

Viscosity of fluoroindate glasses
Author(s): B. J. Costa; Sidney J. L. Ribeiro; Younes Messaddeq
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Paper 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 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, suggests a good resistance against the devitrification process, what can make them suitable for fiber preparation.

Paper Details

Date Published: 28 September 1998
PDF: 7 pages
Proc. SPIE 3416, Infrared Glass Optical Fibers and Their Applications, (28 September 1998); doi: 10.1117/12.323387
Show Author Affiliations
B. J. Costa, Univ. de Sao Paulo and Instituto de Tecnologia do Parana (Brazil)
Sidney J. L. Ribeiro, Univ. Estadual Paulista (Brazil)
Younes Messaddeq, Univ. Estadual Paulista (Brazil)

Published in SPIE Proceedings Vol. 3416:
Infrared Glass Optical Fibers and Their Applications
Mohammed Saad, Editor(s)

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