Please use this identifier to cite or link to this item: http://nopr.niscair.res.in/handle/123456789/54217
Title: Iso-conversional study of crystallization activation energy of amorphous-crystallization transformation for Se79Te20Pb1 glass using non-isothermal differential scanning calorimetry technique
Authors: Vashist, Priyanka
Patial, Balbir Singh
Anjali
Tripathi, S K
Thakur, Nagesh
Keywords: Chalcogenide glass;Differential scanning calorimetry;Non-isothermal methods;Iso-conversional analysis
Issue Date: Mar-2020
Publisher: NISCAIR-CSIR, India
Abstract: 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.
Page(s): 135-140
URI: http://nopr.niscair.res.in/handle/123456789/54217
ISSN: 0975-0959 (Online); 0301-1208 (Print)
Appears in Collections:IJPAP Vol.58(03) [March 2020]

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