Glass compositions, fiberizable glass compositions, and glass fibers made therefrom
AssigneePPG Industries Ohio, Inc.
InventorsHong Li, Paul A. Westbrook
Life of this patent
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Abstract
Embodiments of the present invention provide glass compositions, fiberizable glass compositions, and glass fibers formed from such compositions, as well as glass strands, yarns, fabrics, and composites comprising such glass fibers adapted for use in various applications. In some embodiments of the present invention, the glass compositions additionally include at least one rare earth oxide.
Claims48
A glass composition suitable for fiber forming comprising:
- SiO2
- 56-68 weight percent;
- Al2O3
- 11 to less than 20 weight percent;
- CaO
- 12 weight percent or less;
- MgO
- 7-17 weight percent;
- Na2O
- 0-1 weight percent;
- K2O
- 0-1 weight percent;
- Li2O
- 0-5 weight percent;
- TiO2
- 0-2 weight percent;
- B2O3
- 0-3 weight percent;
- Fe2O3
- 0-1 weight percent;
- SnO2
- 0-4 weight percent;
- ZnO
- 0-4 weight percent;
- at least one rare earth oxide in an amount not less than 1 weight percent;
- wherein the at least one rare earth oxide is selected from the group consisting of La2O3, Y2O3, Sc2O3, CeO2, Sm2O3, and Gd2O3, and
- other constituents 0-11 weight percent total.
A glass composition suitable for fiber forming comprising:
- SiO2
- 60-68 weight percent;
- Al2O3
- 14-19 weight percent;
- CaO
- 5 weight percent or less;
- MgO
- 10-16 weight percent;
- Na2O
- 0-1 weight percent;
- K2O
- 0-1 weight percent;
- Li2O
- 0-2 weight percent;
- TiO2
- 0-2 weight percent;
- B2O3
- 0-3 weight percent;
- Fe2O3
- 0-1 weight percent;
- SnO2
- 0-4 weight percent;
- ZnO
- 0-4 weight percent;
- at least one rare earth oxide in an amount not less than 1 weight percent;
- and
- other constituents 0-11 weight percent total.
A glass composition suitable for fiber forming comprising:
- SiO2
- 60-68 weight percent;
- Al2O3
- 14-19 weight percent;
- CaO
- 5 weight percent or less;
- MgO
- 10-16 weight percent;
- Na2O
- 0-1 weight percent;
- K2O
- 0-1 weight percent;
- Li2O
- 0.4-2 weight percent;
- TiO2
- 0-2 weight percent;
- B2O3
- 0-3 weight percent;
- Fe2O3
- 0-1 weight percent;
- SnO2
- 0-4 weight percent;
- ZnO
- 0-4 weight percent;
- at least one rare earth oxide in an amount between not less than 1 to about 8 weight percent;
- and
- other constituents 0-11 weight percent total,
- wherein Na2O+K2O is not less than 0.05 weight percent.
A glass composition suitable for fiber forming comprising:
- SiO2
- 59-62 weight percent;
- Al2O3
- 14-19 weight percent;
- CaO
- 4-8 weight percent;
- MgO
- 6-11 weight percent;
- Na2O
- 0-1 weight percent;
- K2O
- 0-1 weight percent;
- Li2O
- 0-2 weight percent;
- TiO2
- 0-3 weight percent;
- B2O3
- 0-3 weight percent;
- Fe2O3
- 0-1 weight percent;
- Cu2O
- 0-2 weight percent;
- SrO
- 0-3 weight percent;
- at least one rare earth oxide in an amount not less than 3 weight percent;
- wherein the at least one rare earth oxide is selected from the group consisting of La2O3, Y2O3, Sc2O3, CeO2, Sm2O3, and Gd2O3, and
- other constituents 0-11 weight percent total.
Dependencies are inferred from the claim text.