Ceramics-Silikáty 39 (1) 9-13 (1995)

LIQUIDUS TEMPERATURE AND STRUCTURE OF THE GLASS MELTS IN THE 15 Na₂O.10 (MgO, CaO, Ti0₂, ZrO₂).75 SiO₂ SYSTEM

P. Šimurka, M. Liška, J. Antalík

The liquidus temperature in the 15 Na₂O.10 (MgO, CaO, TiO₂, Zr0₂).75 SiO₂ glass system was measured. The data have been used for the indication of the structural role of Ti02 in this glass system. From the values of liquidus temperature the activity of Si0₂ in the melt was calculated according to Le Chatelier-Schreder equation. The analysis of liquidus temperature, based on the SiO₂ activity coefficient evaluation indicates, that Ti⁴⁺ forms discrete anionic complexes with modifying cations.