ISSN 0862-5468 (Print), ISSN 1804-5847 (online) 

Ceramics-Silikáty 53, (3) 187 - 188 (2009)


EFFECT OF ADDED TiO₂ AND ZrO₂ ON THE CRYSTALLIZATION OF Li₂O - SiO₂ GLASSES: THERMAL AND DIFFRACTION PROPERTIES
 
Jóna Eugen, Moricová Katarína, Pavlík Viliam, Ondrušová Darina, Pajtášová Mariana
 
Department of Inorganic Materials and Environmental Engineering, Faculty of Industrial Technologies Trenčín University of Alexander Dubček, 02 032 Púchov, Slovak Republic

Keywords: Crystallization of Li₂O - SiO₂ glasses, Thermal properties, Diffraction analysis
 

Five glasses with the composition of Li₂O - 2 SiO₂ (a), Li₂O 2 SiO₂ - 0.03 TiO₂ - 0.03 ZrO₂ (b), Li₂O - 2 SiO₂ - 0.05 TiO₂ - 0.05 ZrO₂ (c), Li₂O - 2 SiO₂ - 0.075 TiO₂ - 0.075 ZrO₂ (d), Li₂O - 2 SiO₂ - 0.1 TiO₂ - 0.1 ZrO₂ (e) were prepared and the relationship between structural and kinetic parameters of thermal stability vs. crystallization has been studied. The XRD patterns proved of the presence of lithium metasilicate as a favoured crystallization phase. The order of thermal stability vs. crystallization of studied glass systems based on the values of activation energy is a ≈ b < c< d < e. It has been shown that the values of activation energy obtained from the Ozawa and Kissinger are equivalent.


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