Alkali-free glass and preparation thereof

摘要

The present invention provides the composition of an alkali-free glass composition containing no alkali metal oxide and the preparation thereof. The alkali-free glass comprising substantially no alkali metal oxide according to the present invention comprises 46 to 57 wt % of SiO2; 3.5 to 7.5 wt % of B2O3; 21 to 29 wt % of Al2O3; 3 to 14 wt % of MgO; 11 to 16 wt % of CaO; and 1 to 5 wt % of SrO, based on the total weight of oxides present therein.

主权项

1. An alkali-free glass comprising oxides, the oxides consisting of, based on the total weight of oxides present therein,
46 to 57 wt % of SiO2; 4 to 6 wt % of B2O3; 25 to 29 wt % of Al2O3; 3 to 14 wt % of MgO; 11 to 16 wt % of CaO; and 1 to 5 wt % of SrO, wherein the alkali-free glass has a temperature less than 1510° C. at a viscosity of 102 dPas, and a temperature less than 1210° C. at a viscosity of 104 dPas.