Journal of Thermal Analysis and Calorimetry
Volume/Issue:
Volume 84: Issue 3
Thermal properties of oxide glasses
Part II. Activation energy as a criterion of thermal stability of Li2O·2SiO2·nTiO2 glass systems against crystallization
Authors:
E. Jóna Trenčín University of Alexander Dubček Department of Chemistry and Technology of Inorganic Materials, Faculty of Industrial Technologies Púchov Slovakia 020 32 Púchov Slovakia 020 32

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P. Šimon Slovak University of Technology Department of Physical Chemistry, Faculty of Chemical and Food Technology Bratislava Slovakia 812 37 Bratislava Slovakia 812 37

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K. Nemčeková Trenčín University of Alexander Dubček Institute of Materials and Technologies Research, Faculty of Industrial Technologies Púchov Slovakia 020 32 Púchov Slovakia 020 32

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V. Pavlík Trenčín University of Alexander Dubček Department of Chemistry and Technology of Inorganic Materials, Faculty of Industrial Technologies Púchov Slovakia 020 32 Púchov Slovakia 020 32

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G. Rudinská Trenčín University of Alexander Dubček Department of Chemistry and Technology of Inorganic Materials, Faculty of Industrial Technologies Púchov Slovakia 020 32 Púchov Slovakia 020 32

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E. Rudinská Trenčín University of Alexander Dubček Department of Chemistry and Technology of Inorganic Materials, Faculty of Industrial Technologies Púchov Slovakia 020 32 Púchov Slovakia 020 32

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Pages:
673–677
Online Publication Date:
09 Jun 2006
Publication Date:
01 May 2006
Article Category:
Research Article
DOI:
https://doi.org/10.1007/s10973-005-7548-0
Keywords:
diffraction and spectral properties; Li2O·2SiO2·nTiO2 glass systems; thermal stability
Restricted access

Abstract  

Three glasses with the composition of Li2O⋅2SiO2 (a), Li2O⋅2SiO2⋅0.03TiO2 (b) and Li2O⋅2SiO2⋅0.1TiO2 (c) were prepared and the relationship between structural and kinetic parameters of thermal stability vs. crystallization has been studied by X-ray diffraction, IR spectra and thermal analysis. The XRD patterns proved the presence of lithium metasilicate as a primary crystalline phase which subsequently transformed to lithium disilicate where the transformation is supported by the presence of TiO2. The order of thermal stability vs. crystallization of studied glass systems based on the results of XRD is (a)<(b)<(c). The same order was obtained from the values of activation energy. It has been shown that the values of activation energies obtained from the Ozawa and Kissinger methods are equivalent and that the Kissinger method should be used to obtain the activation energy from the dependence of the maximum peak temperature on the heating rate. It has been discussed that the activation energy represents only an incomplete description of the kinetics of the crystallization process.

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Cover Journal of Thermal Analysis and Calorimetry
Journal of Thermal Analysis and Calorimetry
Print ISSN:
1388-6150
Online ISSN:
1572-8943

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Journal of Thermal Analysis and Calorimetry
Language English
Size A4
Year of
Foundation		 1969
Volumes
per Year		 1
Issues
per Year		 24
Founder Akadémiai Kiadó
Founder's
Address		 H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
Publisher Akadémiai Kiadó
Springer Nature Switzerland AG
Publisher's
Address		 H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
CH-6330 Cham, Switzerland Gewerbestrasse 11.
Responsible
Publisher		 Chief Executive Officer, Akadémiai Kiadó
ISSN 1388-6150 (Print)
ISSN 1588-2926 (Online)

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