Embodiments of the present invention relate to glass compositions, glass fibers formed from such compositions, and related products. In one embodiment, a glass composition comprises 58-62 weight percent SiO2, 14-17 weight percent Al2O3, 14-17.5 weight percent CaO, and 6-9 weight percent MgO, wherein
Embodiments of the present invention relate to glass compositions, glass fibers formed from such compositions, and related products. In one embodiment, a glass composition comprises 58-62 weight percent SiO2, 14-17 weight percent Al2O3, 14-17.5 weight percent CaO, and 6-9 weight percent MgO, wherein the amount of Na2O is 0.09 weight percent or less.
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1. A glass composition comprising: 58-62 weight percent SiO2;14-17 weight percent Al2O3;11-17.5 weight percent CaO;6-9 weight percent MgO;less than 1 weight percent K2O;0-1 weight percent TiO2;F2 is present in an amount up to 0.5 weight percent; andat least one rare earth oxide in an amount between
1. A glass composition comprising: 58-62 weight percent SiO2;14-17 weight percent Al2O3;11-17.5 weight percent CaO;6-9 weight percent MgO;less than 1 weight percent K2O;0-1 weight percent TiO2;F2 is present in an amount up to 0.5 weight percent; andat least one rare earth oxide in an amount between 0.1 and 3.0 weight percent; wherein the amount of Na2O is 0.09 weight percent or less, wherein the glass composition is substantially free of Li2O, and wherein the (Na2O+K2O+Li2O) content is less than 1 weight percent. 2. The glass composition of claim 1, wherein the glass composition is substantially free of B2O3. 3. The glass composition of claim 1, wherein the glass composition is substantially free of Na2O. 4. The glass composition of claim 1, wherein the (MgO+CaO) content is greater than 21.5 weight percent. 5. The glass composition of claim 1, wherein the CaO content is 14-17.5 weight percent. 6. The glass composition of claim 1, further comprising at least one of As2O3, MnO, MnO2, Sb2O3, and SnO2 in an amount greater than 0 weight percent. 7. The glass composition of claim 1, further comprising MnO or MnO2 in an amount from greater than 0 weight percent to 0.5 weight percent. 8. The glass composition of claim 1, wherein the glass composition is fiberizable, has a liquidus temperature of less than 1250° C., and has a forming temperature of less than 1300° C., wherein the difference between the forming temperature and the liquidus temperature is at least 50° C. 9. The glass composition of claim 1, wherein the glass composition is formed at a forming temperature less than 1280° C. 10. A glass fiber formed from the glass composition of claim 1. 11. The glass fiber of claim 10, wherein the glass fiber has a Young's modulus greater than 80 GPa. 12. The glass fiber of claim 10, wherein the glass fiber has a Young's modulus greater than 85 GPa. 13. The glass fiber of claim 10, wherein the glass fiber has a Young's modulus greater than 87 GPa. 14. A glass composition comprising: 58-62 weight percent SiO2;14-17 weight percent Al2O3;11-17.5 weight percent CaO;6-9 weight percent MgO;less than 1 weight percent K2O;less than 1 weight percent Li2O;0-1 weight percent TiO2;ZrO2 is present in an amount up to 2 weight percent;F2 is present in an amount up to 0.5 weight percent, andat least one rare earth oxide in an amount between 0.1 and 3.0 weight percent; wherein the amount of Na2O is 0.09 weight percent or less, and wherein the (Na2O+K2O+Li2O) content is less than 1 weight percent. 15. The glass composition of claim 14, wherein the glass composition is substantially free of Na2O. 16. The glass composition of claim 14, wherein the (MgO+CaO) content is greater than 21.5 weight percent. 17. The glass composition of claim 14, wherein the CaO content is 14-17.5 weight percent. 18. The glass composition of claim 14, wherein the SiO2 content is 60-62 weight percent. 19. The glass composition of claim 14, wherein the glass composition is substantially free of B2O3. 20. The glass composition of claim 14, wherein the glass composition is fiberizable, has a liquidus temperature of less than 1250° C., has a forming temperature of less than 1300° C., and wherein the difference between the forming temperature and the liquidus temperature is at least 50° C. 21. A glass fiber formed from the glass composition of claim 14. 22. The glass fiber of claim 21, wherein the glass fiber has a Young's modulus greater than 80 GPa. 23. A glass composition comprising: 58-62 weight percent SiO2;14-17 weight percent Al2O3;11-17.5 weight percent CaO;6-9 weight percent MgO;less than 1 weight percent K2O;less than 1 weight percent Li2O;0-1 weight percent TiO2;F2 is present in an amount up to 0.5 weight percent; andat least one rare earth oxide in an amount between 0.1 and 3.0 weight percent, wherein the amount of Na2O is 0.09 weight percent or less, wherein the (Na2O+K2O+Li2O) content is less than 1 weight percent, and wherein the (MgO+CaO) content is greater than 21.5 weight percent. 24. The glass composition of claim 23, wherein the CaO content is 14-17.5 weight percent. 25. The glass composition of claim 23, wherein the SiO2 content is 60-62 weight percent. 26. The glass composition of claim 23, wherein the glass composition is substantially free of B2O3. 27. A glass fiber formed from the glass composition of claim 23. 28. The glass fiber of claim 27, wherein the glass fiber has a Young's modulus greater than 80 GPa.
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이 특허에 인용된 특허 (8)
Hofmann, Douglas A.; McGinnis, Peter B., Composition for high performance glass, high performance glass fibers and articles therefrom.
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