4Se96硫系玻璃塊狀試樣,利用等溫步階方法(stepwise method)測定其DSC曲線,并采用新算法對Ge4Se96玻璃的比熱進行了分析計算。通過比熱算出Gibbs自由能變化ΔG和熵變ΔS,得到了ΔG和ΔS隨溫度變化的曲線,確定了Kauzmann 溫度Tk。采用熱機械分析(TMA)確定了Ge4Se96玻璃的應變點、退火點、玻璃轉(zhuǎn)變點、屈服點和軟化點的特征溫度。結(jié)果表明,Ge4Se96的玻璃化轉(zhuǎn)變溫度Tg是81.5 ℃,平均熱膨脹系數(shù)是ΔL/L=(0.0557*T-1.7576)/1000,Kauzmann 溫度Tk=239K。"/>

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Ge4Se96紅外玻璃的熱力學性能研究
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1.西北工業(yè)大學 凝固技術國家重點實驗室;2.西安工業(yè)大學 光電功能材料與器件陜西省重點實驗室

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國家自然科學基金資助(項目號Nos. 51671151, 51401156 and 51371133), 國家973 項目資助(項目號2013CB632904) ,陜西省自然資助(項目號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:

    通過融熔-淬冷法制備了 Ge4Se96硫系玻璃塊狀試樣,利用等溫步階方法(stepwise method)測定其DSC曲線,并采用新算法對Ge4Se96玻璃的比熱進行了分析計算。通過比熱算出Gibbs自由能變化ΔG和熵變ΔS,得到了ΔG和ΔS隨溫度變化的曲線,確定了Kauzmann 溫度Tk。采用熱機械分析(TMA)確定了Ge4Se96玻璃的應變點、退火點、玻璃轉(zhuǎn)變點、屈服點和軟化點的特征溫度。結(jié)果表明,Ge4Se96的玻璃化轉(zhuǎn)變溫度Tg是81.5 ℃,平均熱膨脹系數(shù)是ΔL/L=(0.0557*T-1.7576)/1000,Kauzmann 溫度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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劉振亭,許軍鋒,王亞玲,堅增運,劉江南. Ge4Se96紅外玻璃的熱力學性能研究[J].稀有金屬材料與工程,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.]
DOI：10.12442/j. issn.1002-185X.20170638

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  • 收稿日期:2017-07-19
  • 最后修改日期:2019-01-22
  • 錄用日期:2017-09-11
  • 在線發(fā)布日期: 2019-04-10
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