Thermo-optical properties measurements in chalcogenide glasses using thermal relaxation and thermal lens methods

Lima, S.M., Steimacher, A., Medina, A.N., Baesso, M.L., Petrovich, M.N., Rutt, H.N. and Hewak, D.W. (2004) Thermo-optical properties measurements in chalcogenide glasses using thermal relaxation and thermal lens methods. Journal of Non-Crystalline Solids, 348, 108-112. (doi:10.1016/j.jnoncrysol.2004.08.134).

Abstract

In this work we determine the thermo-optical properties of two chalcogenide glasses (in mol%): 65 Ga₂S₃; 30 La₂S₃; 5 La₂O₃ (Ga:La:S) and 72.5 Ga₂S₃; 27.5 La₂O₃ (Ga:La:S:O). The thermal relaxation calorimetry and the thermal lens technique were combined so that the samples specific heat, thermal diffusivity, thermal conductivity, and the temperature coefficient of the optical path length change could be measured. Our results indicate that changes in thermal diffusivity (~2.7 x 10^-3 cm²/s) and conductivity (~4.8 x 10^-3W/Kcm) observed when La₂O₃ is added in the glass compounds are less than the error in the data.

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Contributors

Author: M.N. Petrovich

Author: D.W. Hewak

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