Glasses in the system BaO.TiO2.Ti2O3.SiO2 were studied by differential thermal analysis. The undercooling temperature T, defined as the liquids temperature minus the temperature at which the first exothermic peak occurs during cooling, drastically is influenced by the melt composition. This is described by the percolation theory of Thorpe [1]. From the composition, the number of bridging oxygens per network former, was calculated. If >2.4, this change with is predicted by the percolation theory, which attributes >2.4 to rigid networks and
Origin
Jena University, Germany
Journal Title
Glastech Ber Glass Sci & Technol 73 C1 2000 338-341
Sector
Special Glass
Class
S 3850