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Ge4Se96红外玻璃的热力学性能研究
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1.西北工业大学 凝固技术国家重点实验室;2.西安工业大学 光电功能材料与器件陕西省重点实验室

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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)


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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    摘要:

    通过融熔-淬冷法制备了 Ge4Se96硫系玻璃块状试样,利用等温步阶方法(stepwise method)测定其DSC曲线,并采用新算法对Ge4Se96玻璃的比热进行了分析计算。通过比热算出Gibbs自由能变化ΔG和熵变ΔS,得到了ΔG和ΔS随温度变化的曲线,确定了Kauzmann 温度Tk。采用热机械分析(TMA)确定了Ge4Se96玻璃的应变点、退火点、玻璃转变点、屈服点和软化点的特征温度。结果表明,Ge4Se96的玻璃化转变温度Tg是81.5 ℃,平均热膨胀系数是ΔL/L=(0.0557*T-1.7576)/1000,Kauzmann 温度Tk=239K。

    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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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,2019,48(3):810~814.[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.]
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  • 收稿日期:2017-07-19
  • 最后修改日期:2019-01-22
  • 录用日期:2017-09-11
  • 在线发布日期: 2019-04-10
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