초록 ▼

Boron-free and fluorine-free glass compositions are provided that have properties of liquidus temperature, softening point and tensile strength similar to those of “E”or “621”glass compositions. These boron-free glass compositions have in percent by weight the following components: _________________

Boron-free and fluorine-free glass compositions are provided that have properties of liquidus temperature, softening point and tensile strength similar to those of “E”or “621”glass compositions. These boron-free glass compositions have in percent by weight the following components: ________________________________ SiO2 55-61 Al2O3 12-18 MgO 4-10 CaO 14-18 Na2O 0.1-1.5 Li2O 0.1-1.5 BaO 0.0-1.0 ________________________________ The compositions may also have minor amounts of Fe2O3, TiO2, and K2O. The glass compositions may be only boron-free and may have a minor amount of fluorine.

대표청구항

A boron-free glass fiber consisting essentially of 55-61 percent SiO2, 12 to 18 percent Al2O3, 4 to 10 percent MgO, 14 to 18 percent CaO, 0.1 to 1.5 percent Na2O, 0.1 to 1.5 percent Li2O, all percents being by weight of the composition.

A boron-free glass fiber consisting essentially of 55-61 percent SiO2, 12 to 18 percent Al2O3, 4 to 10 percent MgO, 14 to 18 percent CaO, 0.1 to 1.5 percent Na2O, 0.1 to 1.5 percent Li2O, all percents being by weight of the composition.