Ceramics-Silikáty 67, (3) 277 - 281 (2023) |
|
EFFECT OF P₂O₅ AND V₂O₅ ON THE THERMAL STABILITY OF Li₂O·2SiO₂ GLASSES
|
Moricová K. 1, Šimon P. 2, Janík R. 1, Kraxner J. 3, Pagáčová J. 1
|
1 Department of Material Technologies and Environment, Faculty of Industrial Technologies, Trenčín University of A. Dubček, SK-020 01 Púchov
2 Institute of Physical Chemistry and Chemical Physic, Faculty of Chemical and Food Technology, Slovak University of Technology, SK-812 37 Bratislava
3 Centre for Functional and Surface Functionalized Glass, Trenčín University of A. Dubček, SK-911 50 Trenčín
|
Keywords: Thermal stability, Induction period, Characteristic temperature, Glass
|
The evaluation of the thermal stability of lithium silicate glasses containing P₂O₅ and V₂O₅ against the crystallisation criteria based on the characteristic temperatures, activation energy values, and the length of the crystallisation induction period was conducted. Five glasses having the composition of Li₂O·2SiO₂, Li₂O·2SiO₂·0.05P₂O₅, Li₂O·2SiO₂·0.1P₂O₅, Li₂O·2SiO₂·0.05V₂O₅ Li₂O·2SiO₂·0.1V₂O₅ were prepared and the validity of the criterion was tested by applying it to the glasses. It was found that the thermal stability of oxide glasses decreases with an increasing P₂O₅ and V₂O₅ content, where the essential system of Li₂O·2SiO₂ proved to be the most stable. |
 PDF (0.6 MB) |
doi: 10.13168/cs.2023.0027
|
|
