High strength glass composition and fibers

Abstract

Glass compositions and high-modulus, and high-strength glass fibers made therefrom, being capable of economical, continuous processing and suitable for the production of high-strength and / or high stiffness, low-weight composites, such as windturbine blades, the glass composition comprises the following constituents in the limits defined below, expressed as weight percentages: between about 56 to about 61 weight percent SiO2; between about 16 to about 23 weight percent Al2O3, wherein the weight percent ratio of SiO2 / Al2O3 is between about 2 to about 4; between about 8 to about 12 weight percent MgO; between about 6 to about 10 weight percent CaO, wherein the weight percent ratio of MgO / CaO is between about 0.7 to about 1.5; between about 0 to about 2 weight percent Na2O; less than about 1 weight percent Li2O; and total residual transition metal oxides of less than about 2 weight percent.

Description

technical field [0001] The present disclosure relates generally to glass compositions suitable for continuous production of high strength glass fibers, and more particularly to fibers formed from the compositions and composites thereof. Background technique [0002] There are currently a large number of glass types designed for high strength and high modulus, at least capable of forming fibers. For example, R-glass and S-glass are examples of these glass types, both of which are stronger than boron-containing E-glass. R-glass is considered a high strength, high modulus glass that can be formed into fibers and is useful in aerospace composite applications. R-glass is usually composed of silica, alumina, magnesia and calcium oxide. [0003] S-glass is usually composed of silica, alumina and magnesia (International ASTM (D578-05)). S-glass fibers have slightly higher mechanical strength due in part to their higher silica content and lower calcium oxide content than R-glass f...

AI Technical Summary

Problems solved by technology

[0004] A drawback of R-glass types and S-glass types is that they require higher melting and processing temperatures during fiber formation than E-glass, which usually requires The components are melted to produce R-glass and S-glass in a furnace such as a platinum-lined furnace, so that the production cost of forming R-glass fiber and S-glass fiber is increased compared to E-glass fiber Taller

In addition, higher processing temperatures reduce the life of the fiber bushings, which are expensive to replace

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