초록 ▼

A method of forming high strength glass fibers in a refractory-lined glass meter, products made there from and batch compositions suited for use in the method are disclosed. The glass composition for use in the method of the present invention is up to about 64-75 weight percent SiO2, 16-24 weight pe

A method of forming high strength glass fibers in a refractory-lined glass meter, products made there from and batch compositions suited for use in the method are disclosed. The 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 and Na2O, has a fiberizing temperature less than about 2650° F., and a ΔT of at least 80° F. By using oxide-based refractory-lined furnaces the cost of production of glass fibers is substantially reduced in comparison with the cost of fibers produced using a platinum-lined melting furnace. High strength composite articles including the high strength glass fibers are also disclosed.

대표청구항 ▼

1. A process for producing glass from raw glass-forming material in a refractory-lined glass melter, the glass melter having a roof, a bottom and side walls, defining an elongated channel having a melting zone and a downstream refining zone, the process comprising the steps of: charging raw glass ba

1. A process for producing glass from raw glass-forming material in a refractory-lined glass melter, the glass melter having a roof, a bottom and side walls, defining an elongated channel having a melting zone and a downstream refining zone, the process comprising the steps of: charging raw glass batch to the melting zone of the refractory-lined glass melter, the glass batch comprising: 68-69 weight percent SiO2;20-22 weight percent Al2O3;9-10 weight percent MgO;no more than 2.0 weight percent CaO; and1-3 weight percent Li2O;providing at least one burner within the roof of the glass melter; andmelting the glass batch to form a fiberizable molten glass, wherein said molten glass produced has a fiberizing temperature of less than about 2650° F. 2. The process of claim 1, wherein said glass fibers produced have a strength of greater than about 700 KPsi. 3. The process of claim 1, wherein the glass batch comprises: less than 5 weight percent total of compounds selected from the group consisting of P2O3, ZnO, ZrO2, SrO, BaO, SO3, F2, B2O3, TiO2 and Fe2O3. 4. The process of claim 1, wherein glass produced from the batch is fiberized at a foiniing temperature of less than 2600° F. 5. The process of claim 1, wherein said molten glass produced from the batch has a liquidus temperature, wherein the difference (ΔT) between the fiberizing temperature and the liquidus temperature is 140° F. 6. A process for producing glass fibers from raw glass batch in a refractory-lined glass melter, the process comprising the steps of: charging raw glass batch to the melting zone of a refractory-lined glass melter, the glass batch comprising: about 68-69 weight percent SiO2;about 20-22 weight percent Al2O3;about 9-10 weight percent MgO;no more than 2.0 weight percent CaO; andabout 1-3 weight percent Li2O,heating the glass batch to form a fiberizable molten glass having a fiberizing temperature of less than about 2650° F.; andfiberizing said molten glass to produce glass fibers having a strength of greater than about 700 KPsi.