COMPOSITION OF SODA-LIME GLASS FOR GLAZING AND TRANSPARENCY Russian patent published in 1998 - IPC

FIELD: compositions of glasses for glazing, production of stained glass panels used in architecture or in automobiles. SUBSTANCE: composition includes the following components, wt.-%: SiO₂, 69-75; CaO, 2-10; Na₂O, 9-17; Fe₂O₃, 0.2-1.5; impurities, up to 1. Glass composition may include also fluorine, oxides of zinc, zirconium, cerium, titanium, aluminum, magnesium, potassium, barium. The sum of percentage of alkaline-earth oxides remains equal to or less than 10%. Glazing made of the composition of glass includes at least one sheet of glass 0.8-10 mm thick. With glass thickness of 3.85 mm, the coefficient of transparency amounts to at least 71%. EFFECT: higher efficiency. 20 cl, 1 tbl