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Characteristic Temperatures and Thermodynamic Calculation of Ge4Se96 glass
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1.State Key Laboratory of Solidification Processing,Northwestern Polytechnical University,Xi’an;2.The Shaanxi Key Laboratory of Photoelectric Functional Materials and Devices,Xi’an Technological University,Xi’an

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    Abstract:

    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.

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[Zhenting Liu, Junfeng Xu, Yaling Wang, Zengyun Jian, Jiangnan Liu. Characteristic Temperatures and Thermodynamic Calculation of Ge4Se96 glass[J]. Rare Metal Materials and Engineering,2019,48(3):810~814.]
DOI:10.12442/j. issn.1002-185X.20170638

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History
  • Received:July 19,2017
  • Revised:January 22,2019
  • Adopted:September 11,2017
  • Online: April 10,2019
  • Published: