Influence Of Different Al2O3-Containing Batch Materials On Melting, Fining And Properties Of Soda-Lime-Silica Glass

Proceeding from the composition (in wt%): 72.5 SiO2, 1.5 Al2O3, 10.5 CaO, 2.5 MgO, 12.5 Na2O, and 0.5 K2O, the batch raw materials calcined and hydrated alumina, nepheline syenite, Calumite and Ecomelt, respectively, were employed in order to introduce aluminium oxide, etc. to the glass. The glasses and melts obtained were investigated with respect to different properties, e.g. viscosity, homogeneity, optical transmission and residual sulfur content.