HIGHLY EFFICIENT FIBERGLASS COMPOSITION, FIBER GLASS AND COMPOSITE MATERIAL THEREFROM Russian patent published in 2020 - IPC C03C13/00 

FIELD: glass.

SUBSTANCE: present invention discloses a fiberglass composition, glass fibre and composite material therefrom. Said fibre-glass composition contains the following components, wt. %: 53–64 SiO₂, more than 19.1 and less than 25 Al₂O₃, 0.05–7 Y₂O₃+ La₂O₃ + Gd₂O₃, not more than 1 Li₂O + Na₂O + K₂O, 10–24 CaO + MgO + SrO, 1.5–12 CaO, less than 2 TiO₂, less than 1.5 Fe₂O₃.

EFFECT: said composition can not only significantly improve the modulus of elasticity and chemical stability of glass, but also enables to overcome technical problems when producing traditional high-performance glasses, including high risk of crystallisation, difficulty of molten glass clarification and low production efficiency in lined furnaces, substantially reducing liquidus temperature and moulding temperature, as well as significantly reduce the rate of crystallisation with other equal conditions, which makes it especially suitable for obtaining high-efficiency glass fibre with excellent chemical stability in lined furnaces.

10 cl, 3 tbl, 6 ex