Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
8145859 | Infrared Physics & Technology | 2018 | 5 Pages |
Abstract
The chalcogenide glass Ge4Se96 was prepared by melt-quenched method. The characteristic temperatures (the strain point, annealing point, glass transition point, yielding point and soften point) were determined by thermal analysis. The result shows that the glass transition point is 52â¯Â°C; the average thermal expansion coefficient is ÎL/L0â¯=â¯(0.0557âTâ1.7576)/1000. The specific heat of Ge4Se96 glass was measured by stepwise method. The difference in specific heat between amorphous structure and undercooled liquid was determined as ÎCpâ¯=â¯0.1812-5.20â¯Ãâ¯10â4Tâ4.92â¯Ãâ¯10â7T2 JKâ1 gâ1. Based on the result of ÎCp, the Gibbs energy and the entropy curves were calculated, and the Kauzmann temperature was determined as Tkâ¯=â¯233.5â¯K, which is between that for pure Se glass (216â¯K) and that for Ge7.4Se92.6 glass (250â¯K). It indicates that for Ge-Se glass with low Ge content, the Kauzmann temperature increases with increasing the content of Ge.
Related Topics
Physical Sciences and Engineering
Physics and Astronomy
Atomic and Molecular Physics, and Optics
Authors
Junfeng Xu, Guozhen Sun, Zhenting Liu, Yaling Wang, Zengyun Jian,