Kinetics of Phase Transformations and Thermal Stability of Ge<sub>x</sub>Se<sub>70</sub>Sb<sub>30-x</sub>(x = 5, 10, 15, 20) Chalcogenide Glasses

• 作者: Anusaiya Kaswan Dinesh Patidar Kananbala Sharma Narendra S. Saxena Vandana Kumari
• 来源期刊: 玻璃与陶瓷期刊(英文)
• 学科: 化学
• 关键词: Glass Transition Region Differential SCANNING CALORIMETRY Activation Energy Thermal Stability
• 年，卷（期）: 2013,（4）
• 页码范围: 99-103
• 页数: 5页
• 分类号: O6

摘要

Kinetic studies of two-phase transformations i.e. glass transition and crystallization for GexSe70Sb30-x (x = 5, 10, 15, 20) glasses have been performed using differential scanning calorimetry (DSC) at different heating rates under non-isothermal condition. The glass transition and crystallization regions have been investigated in terms of their characteristic temperatures i.e. glass transition temperature Tg and crystallization temperature Tc and activation energy. The activation energies of glass transition and crystallization have been calculated by employing peak shift method of Kissinger and isoconversional methods. Activation energies have been found to be dependent on the composition. The thermal stabili- ty is determined from the temperature difference ΔT = Tc — Tg where Tc and Tg are the onset crystallization and glass transition temperature respectively. It has been found that Ge15Se70Sb15 glass is thermally more stable as compared to the other members of the series.