Study of glass transition kinetics of As2S3 and As2Se3 by ultrafast differential scanning calorimetry

• 来源期刊: 中国物理B（英文版）
• 关键词: ultrafast DSC glass transition kinetics fragility index
• 年，卷（期）: 2019,（4）
• 页码范围: 349-352
• 页数: 4页
• 语种: 英文
• DOI: 10.1088/1674-1056/28/4/047802

摘要

Ultrafast differential scanning calorimetry (DSC) was employed to investigate the glass transition kinetics of As2S3 and As2Se3.By using the Arrhenius method,a fragility index of ～ 22 can be estimated in both As2S3 and As2Se3.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 As2S3 and As2Se3 glasses are thus extrapolated as 28.3+1.94 and 23.7± 1.80,respectively.This indicates that,As2Se3 glass has a better structural stability and it is a better candidate for device applications.