Open AccessOn the crystallization kinetics of multicomponent nano-chalcogenide Se79-xTe15In6Pbx(x = 0, 1, 2, 4, 6, 8 and 10) alloys
Author(s) -
. Anjali,
Balbir Singh Patial,
S. Bhardwaj,
A. M. Awasthi,
Nagesh Thakur
Publication year - 2020
Publication title -
nano express
Language(s) - English
Resource type - Journals
ISSN - 2632-959X
DOI - 10.1088/2632-959x/abc8c7
Subject(s) - crystallization , activation energy , differential scanning calorimetry , nucleation , chalcogenide , materials science , glass transition , fragility , chalcogenide glass , thermal stability , arrhenius equation , quenching (fluorescence) , thermodynamics , analytical chemistry (journal) , chemical engineering , chemistry , metallurgy , composite material , polymer , fluorescence , optics , physics , engineering , chromatography
Nanotechnology continuously rises due to its potential applications. To control nano-materials design and microstructure, it is very essential to understand nucleation and crystalline growth in these materials. In this research contribution, crystallization kinetics and thermal behaviour of nano-crystalline Se 79- x Te 15 In 6 Pb x ( x = 0, 1, 2, 4, 6, 8 and 10 at. wt%) chalcogenide alloys is analyzed through differential scanning calorimetry (DSC) process under non-isothermal conditions at four different heating rates; 5, 10, 15 and 20 °C min −1 . The examined Se-Te-In-Pb nano-chalcogenide system is prepared through melt-quenching process. Characteristic temperatures namely glass transition temperature ( T g ), onset crystallization temperature ( T o), peak temperature of crystallization ( T p ) and melting temperature ( T m ) show dependence on heating rate and composition. The various kinetic parameters such as activation energy of glass transition ( E g ), activation energy of crystallization ( E c ), reduced glass transition temperature ( T rg ), Hruby number ( K gl ), thermal stability parameters ( S and H’ ) and fragility index ( F i ) are analyzed for investigated Se-Te-In-Pb nano-crystalline system. Different empirical approaches are applied to determine the apparent glass transition activation energy ( E g ) and crystallization activation energy ( E c ).