HEAT-RESISTANT ALUMINOSILICATE GLASS FIBRES AND ALSO METHOD OF ITS PRODUCTION AND APPLICATION Russian patent published in 2018 - IPC C03C13/06 C03B37/01 C03C3/87 

FIELD: chemistry.

SUBSTANCE: invention relates to heat-resistant aluminosilicate glass fibres having the following composition, wt %: SiO₂ - 52-60, Al₂O₃ - 14-16, Fe₂O₃ - <0.4, Na₂O - 0.03-0.3, K₂O - 0.3-0.7, CaO - 20-22, MgO - 0.4-0.8, TiO₂ - 1-5, BaO - 0.5-3, SrO - 0-2, ZrO₂ - 0-3, CuO - 0-1. The total proportion of alkali metal oxides in total is a maximum of 1.0 wt %, with the total proportion of oxides of SrO, CuO, ZrO₂ is in the range of 0.1 to 4.0 wt %, and wherein the heat-resistant aluminosilicate fibreglass has a transformation temperature of >760°C and the fibre formation temperature of <1260°C, preferably <1230°C. Residual tensile strength of glass fibres with a diameter of 9 to 15 mcm after the thermal load of 760°C is in the range of 10% to 15% compared to the initial tensile strength at room temperature. The invention also relates to a method of producing heat-resistant aluminosilicate fibre glass and to its application. The invention is developed in the dependent claims of the invention formula.

EFFECT: production of heat-resistant aluminosilicate fibre glass with improved performance properties.

11 cl, 4 tbl