Glass compositions, fiberizable glass compositions, and glass fibers made therefrom
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.
1. A glass composition suitable for fiber forming comprising:
SiO 2
56-68 weight percent;
Al 2 O 3
11 to less than 20 weight percent;
CaO
12 weight percent or less;
MgO
7-17 weight percent;
Na 2 O
0-1 weight percent;
K 2 O
0-1 weight percent;
Li 2 O
0-5 weight percent;
TiO 2
0-2 weight percent;
B 2 O 3
0-3 weight percent;
Fe 2 O 3
0-1 weight percent;
SnO 2
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 La 2 O 3 , Y 2 O 3 , Sc 2 O 3 , CeO 2 , Sm 2 O 3 , and Gd 2 O 3 , and
other constituents 0-11 weight percent total.
2. The glass composition of claim 1 , wherein Al 2 O 3 is 14-less than 20 weight percent.
3. The glass composition of claim 1 , wherein MgO is 10-17 weight percent.
4. The glass composition of claim 1 , wherein CaO is less than about 5 weight percent.
5. The glass composition of claim 1 , wherein Na 2 O+K 2 O+Li 2 O is greater than 1 weight percent.
6. The glass composition of claim 5 , wherein Na 2 O+K 2 O is less than about 0.5 weight percent.
7. The glass composition of claim 1 , wherein Na 2 O+K 2 O is less than about 0.5 weight percent.
8. The glass composition of claim 1 , wherein Li 2 O is about 0.4-about 2 weight percent.
9. The glass composition of claim 1 , wherein SiO 2 is at least 60 weight percent.
10. The glass composition of claim 1 , wherein the at least one rare earth oxide is at least 3 weight percent.
11. The glass composition of claim 1 , wherein the at least one rare earth oxide is up to about 8 weight percent.
12. The glass composition of claim 1 , wherein the at least one rare earth oxide is up to about 5 weight percent.
13. The glass composition of claim 1 , wherein ZnO is >0-4 weight percent.
14. The glass composition of claim 1 , wherein SnO 2 is >0-4 weight percent.
15. The glass composition of claim 1 , wherein CeO 2 is >0-4 weight percent.
16. The glass composition of claim 1 , wherein SnO 2 +CeO 2 is >0-8 weight percent.
17. The glass composition of claim 1 , wherein the composition is substantially free of B 2 O 3 .
18. The glass composition of claim 1 , further comprising Nb 2 O 5 in an amount of >0-5 weight percent.
19. A glass composition suitable for fiber forming comprising:
SiO 2
60-68 weight percent;
Al 2 O 3
14-19 weight percent;
CaO
5 weight percent or less;
MgO
10-16 weight percent;
Na 2 O
0-1 weight percent;
K 2 O
0-1 weight percent;
Li 2 O
0-2 weight percent;
TiO 2
0-2 weight percent;
B 2 O 3
0-3 weight percent;
Fe 2 O 3
0-1 weight percent;
SnO 2
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.
20. The glass composition of claim 19 , wherein the at least one rare earth oxide is at least 3 weight percent.
21. The glass composition of claim 19 , wherein the at least one rare earth oxide is up to about 8 weight percent.
22. The glass composition of claim 19 , wherein the at least one rare earth oxide is up to about 5 weight percent.
23. The glass composition of claim 19 , wherein the at least one rare earth oxide comprises at least one of La 2 O 3 , Y 2 O 3 , Sc 2 O 3 , Nd 2 O 3 , CeO 2 , Sm 2 O 3 , and Gd 2 O 3 .
24. The glass composition of claim 19 , wherein ZnO is >0-4 weight percent.
25. The glass composition of claim 19 , wherein SnO 2 is >0-4 weight percent.
26. The glass composition of claim 23 , wherein CeO 2 is >0-4 weight percent.
27. The glass composition of claim 23 , wherein SnO 2 +CeO 2 is >0 and 8 weight percent.
28. The glass composition of claim 19 , wherein the composition is substantially free of B 2 O 3 .
29. The glass composition of claim 19 , further comprising Nb 2 O 5 in an amount of >0-about 5 weight percent.
30. A glass composition suitable for fiber forming comprising:
SiO 2
60-68 weight percent;
Al 2 O 3
14-19 weight percent;
CaO
5 weight percent or less;
MgO
10-16 weight percent;
Na 2 O
0-1 weight percent;
K 2 O
0-1 weight percent;
Li 2 O
0.4-2 weight percent;
TiO 2
0-2 weight percent;
B 2 O 3
0-3 weight percent;
Fe 2 O 3
0-1 weight percent;
SnO 2
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 Na 2 O+K 2 O is not less than 0.05 weight percent.
31. The glass composition of claim 30 , wherein the at least one rare earth oxide is at least 3 weight percent.
32. The glass composition of claim 30 , wherein the at least one rare earth oxide is up to about 5 weight percent.
33. The glass composition of claim 30 , wherein the at least one rare earth oxide comprises at least one of La 2 O 3 , Y 2 O 3 , Sc 2 O 3 , Nd 2 O 3 , CeO 2 , Sm 2 O 3 , and Gd 2 O 3 .
34. The glass composition of claim 33 , wherein CeO 2 is >0-4 weight percent.
35. The glass composition of claim 33 , wherein SnO 2 +CeO 2 is >0-8 weight percent.
36. The glass composition of claim 30 , wherein ZnO is >0-4 weight percent.
37. The glass composition of claim 30 , wherein SnO 2 >0-4 weight percent.
38. The glass composition of claim 30 , wherein the composition is substantially free of B 2 O 3 .
39. The glass composition of claim 30 , further comprising Nb 2 O 5 in an amount of >0-5 weight percent.
40. A glass composition suitable for fiber forming comprising:
SiO 2
59-62 weight percent;
Al 2 O 3
14-19 weight percent;
CaO
4-8 weight percent;
MgO
6-11 weight percent;
Na 2 O
0-1 weight percent;
K 2 O
0-1 weight percent;
Li 2 O
0-2 weight percent;
TiO 2
0-3 weight percent;
B 2 O 3
0-3 weight percent;
Fe 2 O 3
0-1 weight percent;
Cu 2 O
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 La 2 O 3 , Y 2 O 3 , Sc 2 O 3 , CeO 2 , Sm 2 O 3 , and Gd 2 O 3 , and
other constituents 0-11 weight percent total.
41. The glass composition of claim 40 , wherein the at least one rare earth oxide is at least 4 weight percent.
42. The glass composition of claim 40 , wherein the at least one rare earth oxide is up to about 8 weight percent.
43. The glass composition of claim 40 , wherein the at least one rare earth oxide is up to about 5 weight percent.
44. The glass composition of claim 40 , wherein SrO is >0-3 weight percent.
45. The glass composition of claim 40 , wherein Cu 2 O is >0-2 weight percent.
46. The glass composition of claim 40 , wherein Y 2 O 3 is >0-5 weight percent.
47. The glass composition of claim 40 , wherein Cu 2 O+SrO is >0-5 weight percent.
48. The glass composition of claim 40 , wherein the composition is substantially free of B 2 O 3 .