Kinetics of Phase Transformation in Nanostructured Ga-Se-Te Glasses

被引:2
|
作者
Al-Agel, F. A. [1 ]
Al-Arfaj, E. A. [2 ]
Al-Marzouki, F. M. [1 ]
Khan, Shamshad A. [3 ]
Khan, Zishan H. [4 ]
Al-Ghamdi, A. A. [1 ]
机构
[1] King Abdulaziz Univ, Dept Phys, Jeddah 21589, Saudi Arabia
[2] Umm Al Qura Univ, Coll Appl Sci, Dept Phys, Mecca, Saudi Arabia
[3] St Andrews Coll, Dept Phys, Gorakhpur 273001, Uttar Pradesh, India
[4] Jamia Millia Islamia, Dept Appl Sci & Humanities, Fac Engn & Technol, New Delhi 110025, India
关键词
Chalcogenide Glasses; Glass Transition Temperature; Activation Energy; Thermal Stability; CRYSTALLIZATION KINETICS; THIN-FILMS; OPTICAL-PROPERTIES; ACTIVATION-ENERGY; TEMPERATURE;
D O I
10.1166/jnn.2013.7138
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
Bulk samples of Ga25Se75-xTex chalcogenides were prepared by melt quenching technique. The glassy nature of these alloys was verified by X-ray diffraction. The morphology of these as-prepared alloys was studied using field emission scanning electron microscopy. Kinetics of crystallization in these glassy alloys was studied under non-isothermal conditions at different heating rates (5, 10, 15, 20 and 25 K/min) using differential scanning calorimetry. The value of glass transition and crystallization temperature was found to be composition and heating-rate dependent. The value of order parameter indicates that the crystallization was due to volume nucleation with two dimensional growths. The activation energy of crystallization and activation energy of glass transition were determined from the heating rate dependence of glass transition and crystallization temperature. Both the activation energy for glass transition and the activation energy of crystallization were found to decrease from 130.05 to 102.99 kJ/mole and from 130.05 to 102.99 kJ/mole respectively with increasing Te content in Ga-Se system.
引用
收藏
页码:2001 / 2007
页数:7
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