High performance glass fibre composition, and glass fibre and composite material thereof

Abstract

The present invention provides a glass fiber composition, a glass fiber and a composite material therefrom. The glass fiber composition comprises the following components expressed as percentage by weight: 53-64% SiO2, greater than 19% and lower than 25% Al2O3, 0.05-7% Y2O3+La2O3+Gd2O3, not greater than 1% Li2O+Na2O+K2O, 10-24% CaO+MgO+SrO, 1.5-12% CaO, lower than 2% TiO2, lower than 1.5% Fe2O3. Said composition can not only significantly improve the elastic modulus and chemical stability of the glass, but also overcome the technical problems in the manufacture of traditional high-performance glasses including high risk of crystallization, fining difficulty of molten glass and production efficiency difficulty with refractory-lined furnaces, significantly reduce the liquidus and forming temperatures and greatly reduce the crystallization rate under the same conditions, thus making it particularly suitable for production of high-performance glass fiber with excellent chemical stability in refractory-lined furnaces.

Dependencies are inferred from the claim text.