| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1483421 | Journal of Non-Crystalline Solids | 2010 | 4 Pages |
Abstract
Temperature dependence of optical transmission in the fundamental optical absorption edge region is studied through the glass transition interval for the typical representative of fragile As-Se glasses. Near-linear temperature dependence of the optical characteristics is observed for the non-aged As10Se90 glass through the whole investigated range of temperatures, while a well-expressed non-linear peculiarity in the vicinity of glass transition is recorded for the 1Â year and 20Â years aged samples. It is associated with restoration of the optical properties of supercooled liquid during glass-to-supercooled liquid transition and is directly observed in the temperature range where the endothermic peak in DSC curves is observed. It is shown that long-term physical ageing at normal conditions results in a bleaching effect. Observed phenomenon is discussed in terms of the microstructural model of natural physical ageing developed recently.
Related Topics
Physical Sciences and Engineering
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Ceramics and Composites
Authors
R. Golovchak, A. Kozdras, O. Shpotyuk,