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Title: A study of the crystallization kinetics in Se<sub>68</sub>Ge<sub>22</sub>Pb<sub>10</sub> chalcogenide glass
Authors: Mehta, N
Agarwal, P
Kumar, A
Issue Date: Dec-2004
Publisher: CSIR
Series/Report no.: Int. Cl.<sup>7</sup> C03C
Abstract: Differential scanning calorimetry (DSC) is performed at different heating rates under non-isothermal conditions to study the crystallization kinetics of Se<sub>68</sub>Ge<sub>22</sub>Pb<sub>10</sub> chalcogenide glass. Different kinetic parameters such as the activation energy of crystallization (<i style="">E<sub>c</sub></i>), the order parameter (<i style="">n</i>), the rate constant and its frequency factor have been determined. Four different non-isothermal methods Kissinger’s method, Matusita-Sakka theory, Augis-Bennett approximation and Ozawa-Chen method have been used in the present study. The average value of activation energy of crystallization <i style="">E<sub>c</sub></i> is 1.477 eV. The average value of Avrami’s index <i style="">n</i> is 3.61, which indicates that in the glassy Se<sub>68</sub>Ge<sub>22</sub>Pb<sub>10</sub>, two crystallization (two- and three-dimensional growth) mechanisms are working simultaneously during its amorphous to crystalline transformation.
Description: 511-515
ISSN: 0975-1017 (Online); 0971-4588 (Print)
Appears in Collections:IJEMS Vol.11(6) [December 2004]

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