Iso-conversional study of crystallization activation energy of amorphous-crystallization transformation for Se79Te20Pb1 glass using non-isothermal differential scanning calorimetry technique

Indian Journal of Pure & Applied Physics

article

Priyanka Vashist¹  Balbir Singh Patial²  Anjali¹  S K Tripathi⁴  Nagesh Thakur¹ 

[1] Department of Physics, H P University Summerhill;Rashtriya Uchchatar Shiksha Abhiyan;Department of Physics, Government College Sunni;Centre of Advanced Study in Physics, Panjab University

关键词: Chalcogenide glass;    Differential scanning calorimetry;    Non-isothermal methods;    Iso-conversional analysis;    Article;   

来源: National Institute of Science Communication and Information Resources

【 摘 要 】

The ternary Se79Te20Pb1 chalcogenide glass is prepared using melt quenching technique. Differential scanning calorimetry technique (DSC) is used to investigate the kinetics of crystallization of amorphous-crystallization (a-c) phase transformation under non-isothermal conditions at three different heating rates; 5, 10 and 15° C min-1. The variation of crystallized activation energy (Ec) with crystallized fraction (ϰ) and hence, with temperature (T) is investigated using five iso-conversional methods namely KAS, OFW, Friedman, Tang and Chen and Starink. It is found that Ec is not constant but vary with ϰ as well as T. Thus, the iso-conversional analysis of investigated glass indicates that the assumption of constant Ec is not appropriate.

【 授权许可】

Unknown