GLASS FOR MANUFACTURING FIBER GLASS AND HIGH- TEMPERATURE SILICIC FIBER GLASS BASED THEREON Russian patent published in 2001 - IPC

FIELD: manufacture of cotton wool, fabrics, filements and mats used as heat-insulating material. SUBSTANCE: glass comprises, wt %: Al₂O₃, 2.5- 3.5; Na₂O, 20-25; SO₃, 0.01-1.0; SiO₂, the balance, and at least one oxide from group consisting of CaO, MgO, TiO₂, Fe₂O₃, ZrO₂, ratios of components being as follows : CaO, 0.01-0.5; MgO, 0.01-0.5; TiO₂, 0.01-0.1; Fe₂O₃, 0.1- 0.5; ZrO₂, 0.01-0.5. High-temperature silicic fiber comprises, wt %: SiO₂, 94-96; Al₂O₃, 3-4; Na₂O, 0.01-1.0; CoO, 0.01-1.0; SO₃, 0.01-1.0, and also at least one oxide from group consisting of CaO, MgO, TiO₂, Fe₂O₃, ZrO₂ in amounts, wt %: CaO, 0.01-0.5; MgO, 0.01-0.5; TiO₂, 0.01-0.1; Fe₂O₃, 0.01- 0.5; ZrO₂, 0.01-0.5. EFFECT: improved properties of the glass. 5 cl, 3 tbl