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,2019,47(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,2019,47(3):810~814.]
Ge4Se96红外玻璃的热力学性能研究
投稿时间:2017-07-19  修订日期:2019-01-22
中文关键词:  硒基玻璃  比热  特征温度  热力学计算
基金项目: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)
中文摘要:
      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。
Characteristic Temperatures and Thermodynamic Calculation of Ge4Se96 glass
英文关键词:Se-based glass  Specific heat  The characteristic temperatures  Thermodynamic calculation
英文摘要:
      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.
作者单位E-mail
刘振亭 西北工业大学 凝固技术国家重点实验室 6344526@qq.com 
许军锋 西北工业大学 凝固技术国家重点实验室  
王亚玲 西安工业大学 光电功能材料与器件陕西省重点实验室  
坚增运 西安工业大学 光电功能材料与器件陕西省重点实验室  
刘江南 西北工业大学 凝固技术国家重点实验室  
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