Abstract: A glass composition is provided that includes about 55.0 to 60.4% by weight SiO2, about 19.0 to 25.0% by weight Al2O3, about 8.0 to 15.0% by weight MgO, about 7 to 12.0% by weight CaO, less than 0.5% by weight Li2O, 0.0 to about 1.0% by weight Na2O, and 0 to about 1.5% by weight TiO2. The glass composition has a fiberizing temperature of no greater than about 2,500° F. Glass fibers formed from the inventive composition may be used in applications that require high stiffness, and low weight. Such applications include woven fabrics for use in forming wind blades and aerospace structures.

Abstract: A glass composition is provided that includes about 55.0 to 60.4% by weight SiO2, about 19.0 to 25.0% by weight Al2O3, about 8.0 to 15.0% by weight MgO, about 7 to 12.0% by weight CaO, less than 0.5% by weight Li2O, 0.0 to about 1.0% by weight Na2O, and 0 to about 1.5% by weight TiO2. The glass composition has a fiberizing temperature of no greater than about 2,500° F. Glass fibers formed from the inventive composition may be used in applications that require high stiffness, and low weight. Such applications include woven fabrics for use in forming wind blades and aerospace structures.

Abstract: A glass composition is provided that includes about 55.0 to 60.4% by weight SiO2, about 19.0 to 25.0% by weight Al2O3, about 8.0 to 15.0% by weight MgO, about 7 to 12.0% by weight CaO, less than 0.5% by weight Li2O, 0.0 to about 1.0% by weight Na2O, and 0 to about 1.5% by weight TiO2. The glass composition has a fiberizing temperature of no greater than about 2,500° F. Glass fibers formed from the inventive composition may be used in applications that require high stiffness, and low weight. Such applications include woven fabrics for use in forming wind blades and aerospace structures.

Abstract: A glass composition is provided that includes about 55.0 to 60.4% by weight SiO2, about 19.0 to 25.0% by weight Al2O3, about 8.0 to 15.0% by weight MgO, about 7 to 12.0% by weight CaO, less than 0.5% by weight Li2O, 0.0 to about 1.0% by weight Na2O, and 0 to about 1.5% by weight TiO2. The glass composition has a fiberizing temperature of no greater than about 2,500° F. Glass fibers formed from the inventive composition may be used in applications that require high stiffness, and low weight. Such applications include woven fabrics for use in forming wind blades and aerospace structures.

Abstract: A method of forming high strength glass fibers in a glass melter substantially free of platinum or other noble metal materials, products made there from and batch compositions suited for use in the method are disclosed. One glass composition for use in the present invention includes 50-75 weight % SiO2, 13-30 weight % Al2O3, 5-20 weight % MgO, 0-10 weight % CaO, 0 to 5 weight % R2O where R2O is the sum of Li2O, Na2O and K2O, has a higher fiberizing temperature, e.g. 2400-2900° F. (1316-1593° C.) and/or a liquidus temperature that is below the fiberizing temperature by as little as 45° F. (25° C.). Another glass composition for use in the method of the present invention is up to about 64-75 weight percent SiO2, 16-24 weight percent Al2O3, 8-12 weight percent MgO and 0.25-3 weight percent R2O, where R2O equals the sum of Li2O, Na2O and K2O, has a fiberizing temperature less than about 2650° F. (1454° C.), and a ?T of at least 80° F. (45° C.).

Abstract: Glass fibers are presented having a composition of about 48-54 weight percent SiO2; about 7-14 weight percent Al2O3, about 10-16 weight percent CaO, about 7-13 weight percent TiO2, and about 9-19 weight percent ZnO. A composite material is also provided formed of a polymer matrix and glass fibers of the present invention. The fibers of the present invention have a refractive index between about 1.60 and 1.66 at 590 nm.

Abstract: A glass composition including SiO2 in an amount from about 69.5 to about 80.0% by weight, Al2O3 in an amount from about 5.0 to about 18.5% by weight, MgO in an amount from about 5.0 to about 14.75% by weight, CaO in an amount from 0.0 to about 3.0% by weight, Li2O in an amount from about 3.25 to about 4.0% by weight, and Na20 in an amount from 0.0 to about 2.0% by weight is provided. Glass fibers formed from the inventive composition may be used in applications that require high strength, high stiffness, and low weight. Such applications include, but are not limited to, woven fabrics for use in forming wind blades, armor plating, and aerospace structures.

Abstract: A glass composition including SiO2 in an amount from 60.0 to 73.01% by weight, Al2O3 in an amount from about 13.0 to about 26.0% by weight, MgO in an amount from about 5.0 to about 12.75% by weight, CaO in an amount from about 3.25 to about 4.0% by weight, Li2O in an amount from about 3.25 to about 4.0% by weight, and Na2O in an amount from 0.0 to about 0.75% by weight is provided. Glass fibers formed from the inventive composition may be used in applications that require high strength, high stiffness, and low weight. Such applications include, but are not limited to, woven fabrics for use in forming wind blades, armor plating, and aerospace structures.

Abstract: A glass composition including SiO2 in an amount from 74.5 to 80.0% by weight, Al2O3 in an amount from 5.0 to 9.5%>> by weight, MgO in an amount from 8.75 to 14.75% by weight, CaO in an amount from 0.0 to 3.0% by weight, Li2O in an amount from 2.0 to 3.25% by weight, Na2O in an amount from 0.0 to 2.0% by weight is provided. Glass fibers formed from the inventive composition may be used in applications that require high strength, high stiffness, and low weight. Such applications include woven fabrics for use in forming wind blades, armor plating, and aerospace structures.

Abstract: A glass composition including SiO2 in an amount from 74.5 to 80.0% by weight, AI2O3 in an amount from 5.0 to 9.5%>> by weight, MgO in an amount from 8.75 to 14.75% by weight, CaO in an amount from 0.0 to 3.0% by weight, Li2O in an amount from 2.0 to 3.25% by weight, Na2O in an amount from 0.0 to 2.0% by weight is provided. Glass fibers formed from the inventive composition may be used in applications that require high strength, high stiffness, and low weight. Such applications include woven fabrics for use in forming wind blades, armor plating, and aerospace structures.

Abstract: A glass composition including Si02 in an amount from about 70.6 to about 79.6% by weight, AI2O3 in an amount from about 10.0 to 18.5% by weight, MgO m an amount from about 10.0 to about 19.0% by weight, CaO in an amount from about 0.1 to about 5.0% by weight, Li20 in an amount from 0.0 to about 3.0% by weight, and Na20 in an amount from 0.0 to about 3.0% by weight is provided. In exemplary embodiments, the glass composition is free or substantially free of B2O3 and fluorine. The glass fibers have a specific modulus between about 3.40×107 J/kg and 3.6×107 J/kg. Glass fibers formed from the inventive composition possess exceptionally an exceptionally high modulus and a low density, which make them particularly suitable in applications that require high strength, high stiffness, and low weight, such as wind blades and aerospace structures.

Abstract: A glass composition including SiO2 in an amount from 60.0 to 73.01% by weight, Al2O3 in an amount from about 13.0 to about 26.0% by weight, MgO in an amount from about 5.0 to about 12.75% by weight, CaO in an amount from about 3.25 to about 4.0% by weight, Li2O in an amount from about 3.25 to about 4.0% by weight, and Na2O in an amount from 0.0 to about 0.75% by weight is provided. Glass fibers formed from the inventive composition may be used in applications that require high strength, high stiffness, and low weight. Such applications include, but are not limited to, woven fabrics for use in forming wind blades, armor plating, and aerospace structures.

Abstract: A glass composition including SiO2 in an amount from about 69.5 to about 80.0% by weight, Al2O3 in an amount from about 5.0 to about 18.5% by weight, MgO in an amount from about 5.0 to about 14.75% by weight, CaO in an amount from 0.0 to about 3.0% by weight, Li2O in an amount from about 3.25 to about 4.0% by weight, and Na20 in an amount from 0.0 to about 2.0% by weight is provided. Glass fibers formed from the inventive composition may be used in applications that require high strength, high stiffness, and low weight. Such applications include, but are not limited to, woven fabrics for use in forming wind blades, armor plating, and aerospace structures.

Abstract: A composition for the manufacture of high strength glass fibers suitable for manufacture in a refractory lined glass melter is disclosed. The glass composition of the present invention includes 64-75 weight % SiO2, 16-24 weight % Al2O3, 8-11 weight % MgO and 0.25 to 3.0 weight % R2O where R2O is the sum of Li2O and Na2O. A composition of the present invention includes 64-75 weight % SiO2, 16-24 weight % Al2O3, 8-11 weight % MgO and 0.25 to 3.0 weight % Li2O. Another composition includes 68-69 weight percent SiO2, 20-22 weight percent Al2O3, 9-10 weight percent MgO and 1-3 weight percent Li2O. By using oxide based refractory lined furnaces the cost of production of glass fibers is substantially reduced in comparison with the cost of fibers using a platinum lined melting furnace. Fibers formed by the present invention are also disclosed. The fibers have a fiberizing temperature of less than 2650° F., a ?T of at least 80° F.

Abstract: Glass fibers are presented having a composition of about 48-54 weight percent SiO2; about 7-14 weight percent Al2O3, about 10-16 weight percent CaO, about 7-13 weight percent TiO2, and about 9-19 weight percent ZnO. A composite material is also provided formed of a polymer matrix and glass fibers of the present invention. The fibers of the present invention have a refractive index between about 1.60 and 1.66 at 590 nm.

Abstract: A composition for the manufacture of high strength glass fibers suitable for manufacture in a refractory lined glass melter is disclosed. The glass composition of the present invention includes 64-75 weight % SiO2, 16-24 weight % Al2O3, 8-11 weight % MgO and 0.25 to 3.0 weight % R2O where R2O is the sum of Li2O and Na2O. A composition of the present invention includes 64-75 weight % SiO2, 16-24 weight % Al2O3, 8-11 weight % MgO and 0.25 to 3.0 weight % Li2O. Another composition includes 68-69 weight percent SiO2, 20-22 weight percent Al2O3, 9-10 weight percent MgO and 1-3 weight percent Li2O. By using oxide based refractory lined furnaces the cost of production of glass fibers is substantially reduced in comparison with the cost of fibers using a platinum lined melting furnace. Fibers formed by the present invention are also disclosed. The fibers have a fiberizing temperature of less than 2650° F., a ?T of at least 80° F.