The results of non-isothermal crystallization studies performed at different heating rates on batches of As2Se3 glasses prepared from melts at 400°C, 600°C and 800°C are reported. The peak temperature of crystallizationTp, the enthalpy of crystallization ΔHc and the activation energy for crystallizationEc are independent of the melt temperature used in the preparation. Bulk nucleation with three-dimensional growth of crystals is indicated for As2Se3. The values of ΔHc andEc are found to be respectively 23·3 ± 0·9 cal/g and 36·5 ± 0·9 kcal/mol for As2Se3.
Volume 42 | Issue 6
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