Non-Isothermal Crystallization of Lithium Germanophosphate Glass Studied by Different Kinetic Methods

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 phas...

Full description

Saved in:
Bibliographic Details
Published in:Science of sintering 2018-01, Vol.50 (1), p.1-10
Main Authors: Matijašević, Srðan D, Grujić, Snežana R, Topalović, Vladimir S, Nikolić, Jelena D, Smiljanić, Sonja V, Labus, Nebojša J, Savić, Veljko V
Format: Article
Language:English
Subjects:
Crystallization
Dependence
Differential thermal analysis
Glass
Lithium
Transformations
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary: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 (α) 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 α and hence with temperature and consequently the glass/crystal transformation can be described as a complex process involving different mechanisms of nucleation and growth.
ISSN:0350-820X
1820-7413