FIELD: glass.
SUBSTANCE: invention relates to glass compositions for producing high-modulus and high-strength glass fibres. Initial composition for glass fibre producing contains following components, wt%: from approximately 60.5 to approximately 70.5 of SiO2; from approximately 10 to approximately 24.5 of Al2O3; from approximately 11.96 to approximately 20 of alkali-earth metal oxide, from 0 to approximately 3 of alkali metals oxides. Said alkali-earth metal oxide denotes sum of MgO, CaO, SrO and BaO, where amount of MgO in said alkali-earth metal oxide makes at least 5 wt% of mentioned initial composition and amount of CaO in said alkali-earth metal oxide is less than 6.96 wt% of mentioned initial composition.
EFFECT: technical result consists in reduction of fiberization temperature, increase of difference between liquidus temperature and fiberization temperature, which leads to fiber higher elasticity and helps to prevent glass devitrification.
20 cl, 8 tbl
