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刘振亭,许军锋,王亚玲,坚增运,刘江南.Ge4Se96红外玻璃的热力学性能研究[J].稀有金属材料与工程(英文),2019,47(3):810~814.[Zhenting Liu,Junfeng Xu,Yaling Wang,Zengyun Jian and Jiangnan Liu.Characteristic Temperatures and Thermodynamic Calculation of Ge4Se96 glass[J].Rare Metal Materials and Engineering,2019,47(3):810~814.]
Characteristic Temperatures and Thermodynamic Calculation of Ge4Se96 glass
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Received:July 19, 2017  Revised:January 22, 2019
Key words: Se-based glass  Specific heat  The characteristic temperatures  Thermodynamic calculation
Foundation item:国家自然科学基金资助(项目号Nos. 51671151, 51401156 and 51371133), 国家973 项目资助(项目号2013CB632904) ,陕西省自然资助(项目号No. 2016KJXX-87)
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Zhenting Liu,Junfeng Xu,Yaling Wang,Zengyun Jian and Jiangnan Liu  
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      Se-based glass is an important system on account of its excellence glass formation ability.The Ge4Se96 glass was prepared by melt quenched method. The stepwise method for measuring specific heat (Cp) was studied, Cp of Ge4Se96 glass was then measured and the relation of and temperature T for undercooled liquid was determined. 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 81.5 ℃; the average thermal expansion coefficient is ΔL/L=(0.0557*T-1.7576)/1000. With the result of Cp, the Gibbs energy and the entropy curves were calculated. The Kauzmann temperature can then be determined as Tk=239K.