| 摘要 |
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 inciudes 64-75 weight % SIO2, 16-24 weight % AI2O3, 8-11 weight % MgO and 0.25 to 3.0 weight % R2O where R2O is the sum of LI2O and Na20. A preferred composition of the present invention inciudes 64-75 weight % SIO2, 16-24 weight % AI203,8-11 weight % MgO and 0.25 to 3.0 weight % LI2O, Another preferred composition inciudes 68-69 weight percent SIO2 20-22 weight percent AI2O3, 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 (1454 C), a AT of at least 80 F (44.44 C). Further, the glass fibers have a strength in excess of 680 KPSI, preferably a strength in excess of about 700 KPSI, and most preferably a sfrength in excess of about 730 KPSI. The glass fibers will desirably have a modulus greater than 12.0 MPSI, preferably greater than about 12.18 MPSI, and most preferably greater than about 12.7 MPSI.
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