中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
Unraveling the Crystallization Kinetics of Supercooled Liquid GeTe by Ultrafast Calorimetry

文献类型:期刊论文

作者Chen, Yimin; Wang, Guoxiang; Song, Lijian; Shen, Xiang; Wang, Junqiang; Huo, Juntao; Wang, Rongping; Xu, Tiefeng; Dai, Shixun; Nie, Qiuhua
刊名CRYSTAL GROWTH & DESIGN
出版日期2017
卷号17期号:7页码:3687-3693
ISSN号1528-7483
英文摘要Crystallization kinetics of phase change materials (PCMs) at high temperatures is of key importance for the extreme speed of data writing and erasing. In this work, the crystallization behavior of one of the typical PCMs, GeTe, has been studied using ultrafast differential scanning calorimetry (DSC) at high heating rates up to 4 x 104 K s(-1). A strong non-Arrhenius temperature-dependent viscosity has been observed. We considered two viscosity models for estimating the crystal growth kinetics coefficient (U-kin). The results showed that the MYEGA model was more suitable to describe the temperature-dependent viscosity and the crystal growth kinetics for supercooled liquid GeTe. The glass transition temperature (T-g) and fragility m were estimated to be 432.1 K and 130.7, respectively. The temperature-dependent crystal growth rates, which were extrapolated by the MYEGA model, were in line with the experimental results that were measured by in situ transmission electron microscopy at a given temperature. The crystal growth rate reached a maximum of 3.5 m s(-1) at 790 K. These results based on ultrafast DSC with the MYEGA model offer a revelation for crystallization kinetics of supercooled liquid GeTe.
公开日期2017-12-25
源URL[http://ir.nimte.ac.cn/handle/174433/13756]  
专题2017专题
推荐引用方式
GB/T 7714
Chen, Yimin,Wang, Guoxiang,Song, Lijian,et al. Unraveling the Crystallization Kinetics of Supercooled Liquid GeTe by Ultrafast Calorimetry[J]. CRYSTAL GROWTH & DESIGN,2017,17(7):3687-3693.
APA Chen, Yimin.,Wang, Guoxiang.,Song, Lijian.,Shen, Xiang.,Wang, Junqiang.,...&Nie, Qiuhua.(2017).Unraveling the Crystallization Kinetics of Supercooled Liquid GeTe by Ultrafast Calorimetry.CRYSTAL GROWTH & DESIGN,17(7),3687-3693.
MLA Chen, Yimin,et al."Unraveling the Crystallization Kinetics of Supercooled Liquid GeTe by Ultrafast Calorimetry".CRYSTAL GROWTH & DESIGN 17.7(2017):3687-3693.

入库方式: OAI收割

来源:宁波材料技术与工程研究所

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