摘要
Ultrafast differential scanning calorimetry(DSC) was employed to investigate the glass transition kinetics of As_2S_3 and As_2Se_3 . By using the Arrhenius method, a fragility index of～22 can be estimated in both As_2S_3 and As_2Se_3 .However, when the scanning rate is more than 200 K·s^(-1), non-Arrhenius behavior can be observed in such "strong" liquids where the Vogel–Fulcher method is more accurate to describe the glass transition kinetics. The fragilities of As_2S_3 and As_2Se_3 glasses are thus extrapolated as 28.3±1.94 and 23.7±1.80, respectively. This indicates that, As_2Se_3 glass has a better structural stability and it is a better candidate for device applications.
Ultrafast differential scanning calorimetry(DSC) was employed to investigate the glass transition kinetics of As_2S_3 and As_2Se_3 . By using the Arrhenius method, a fragility index of～22 can be estimated in both As_2S_3 and As_2Se_3 .However, when the scanning rate is more than 200 K·s^(-1), non-Arrhenius behavior can be observed in such "strong" liquids where the Vogel–Fulcher method is more accurate to describe the glass transition kinetics. The fragilities of As_2S_3 and As_2Se_3 glasses are thus extrapolated as 28.3±1.94 and 23.7±1.80, respectively. This indicates that, As_2Se_3 glass has a better structural stability and it is a better candidate for device applications.
作者
张凡
陈益敏
王荣平
沈祥
王军强
徐铁峰
Fan Zhang;Yimin Chen;Rongping Wang;Xiang Shen;Junqiang Wang;Tiefeng Xu
基金
Project supported by the National Natural Science Foundation of China(Grant Nos.61775111,61775109,and 51771216)
the Natural Science Foundation of Zhejiang Province,China(Grant No.LR18E010002)
the International Cooperation Project of Ningbo City(Grant No.2017D10009)
the One Hundred Talents Program of Chinese Academy of Sciences
3315 Innovation Team in Ningbo City
the Magna Fund sponsored by K C Wong in Ningbo University,China
