Glass-crystal transformation under non-isothermal conditions: Kinetic analysis of the Ag0.16As0.38Se0.46 glassy alloy by using a new theoretical method based on nucleation and growth processes, which depend on time as a power law

2010 ◽  
Vol 405 (21) ◽  
pp. 4462-4469 ◽  
Author(s):  
J. Vázquez ◽  
J.L. Cárdenas-Leal ◽  
D. García-G. Barreda ◽  
R. González-Palma ◽  
P.L. López-Alemany ◽  
...  
Keyword(s):  
Kinetic Analysis ◽  
Power Law ◽  
Glassy Alloy ◽  
Theoretical Method ◽  
Nucleation And Growth ◽  
Growth Processes ◽  
Isothermal Conditions ◽  
Crystal Transformation ◽  
Glass Crystal

A theoretical method to analyze the glass–crystal transformation kinetics under non-isothermal regime: Application to crystallization of the Ge0.13Sb0.23Se0.64 glassy alloy

2008 ◽  
Vol 403 (21-22) ◽  
pp. 3957-3963 ◽  
Author(s):  
J. Vázquez ◽  
D. García-G.Barreda ◽  
J.L. Cárdenas-Leal ◽  
P.L. López-Alemany ◽  
P. Villares ◽  
...  
Keyword(s):  
Glassy Alloy ◽  
Theoretical Method ◽  
Transformation Kinetics ◽  
Crystal Transformation ◽  
Glass Crystal ◽  
Isothermal Regime

scholarly journals Non-isothermal crystallization of lithium germanophosphate glass studied by different kinetic methods

2018 ◽  
Vol 50 (2) ◽  
pp. 193-203 ◽  
Author(s):  
Srdjan Matijasevic ◽  
Snezana Grujic ◽  
Vladimir Topalovic ◽  
Jelena Nikolic ◽  
Sonja Smiljanic ◽  
...  
Keyword(s):  
Isothermal Condition ◽  
Nucleation And Growth ◽  
Glass Crystallization ◽  
Crystallization Peak ◽  
Crystal Transformation ◽  
Model Free ◽  
Complex Process ◽  
Glass Crystal ◽  
Linear Integral ◽  
Kinetics Of

Crystallization kinetics of 22.5Li2O?10Al2O3?30GeO2?37.5P2O5 (mol%) glass was studied under non-isothermal condition using the differential thermal analysis (DTA). The study was performed by using the first crystallization peak temperature (Tp1) which belongs to the precipitation of LiGe2(PO4)3 phase in the glass. The activation energy of glass crystallization (Ea) was determined using different isokinetic methods. The dependence of Ea on the degree of glass-crystal transformation (?) was studied using model-free isoconversional linear integral KAS (Kissinger-Akahira-Sunose) and FWO (Flynn-Wall-Ozawa) methods. It was shown that the Ea varies with ? and hence with temperature and consequently the glass/crystal transformation can be described as a complex process involving different mechanisms of nucleation and growth.

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