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

摘要

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 (similar to2.7 x 10(-3) cm(2)/s) and conductivity (similar to4.8 x 10(-3) W/Kcm) observed when La2O3 is added in the glass compounds are less than the error in the data. (C) 2004 Elsevier B.V. All rights reserved.