Glass compositions and fibers made therefrom

Patent metadata

Field	Value
Publication number	US-9714189-B2
Application number	US-201414529375-A
Country	US
Kind code	B2
Filing date	Oct 31, 2014
Priority date	Sep 9, 2011
Publication date	Jul 25, 2017
Grant date	Jul 25, 2017

Abstract

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 SiO 2 , 14-17 weight percent Al 2 O 3 , 14-17.5 weight percent CaO, and 6-9 weight percent MgO, wherein the amount of Na 2 O is 0.09 weight percent or less.

First claim

That which is claimed:

1. A glass composition comprising:
58-62 weight percent SiO 2 ;
14-17 weight percent Al 2 O 3 ;
11-17.5 weight percent CaO;
6-9 weight percent MgO;
less than 1 weight percent K 2 O;
0-1 weight percent TiO 2 ;
F 2 is present in an amount up to 0.5 weight percent; and
at least one rare earth oxide in an amount between 0.1 and 3.0 weight percent;

wherein the amount of Na 2 O is 0.09 weight percent or less, wherein the glass composition is substantially free of Li 2 O, and wherein the (Na 2 O+K 2 O+Li 2 O) content is less than 1 weight percent.

2. The glass composition of claim 1 , wherein the glass composition is substantially free of B 2 O 3 .

3. The glass composition of claim 1 , wherein the glass composition is substantially free of Na 2 O.

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 As 2 O 3 , MnO, MnO 2 , Sb 2 O 3 , and SnO 2 in an amount greater than 0 weight percent.

7. The glass composition of claim 1 , further comprising MnO or MnO 2 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 SiO 2 ;
14-17 weight percent Al 2 O 3 ;
11-17.5 weight percent CaO;
6-9 weight percent MgO;
less than 1 weight percent K 2 O;
less than 1 weight percent Li 2 O;
0-1 weight percent TiO 2 ;
ZrO 2 is present in an amount up to 2 weight percent;
F 2 is present in an amount up to 0.5 weight percent, and
at least one rare earth oxide in an amount between 0.1 and 3.0 weight percent;

wherein the amount of Na 2 O is 0.09 weight percent or less, and wherein the (Na 2 O+K 2 O+Li 2 O) content is less than 1 weight percent.

15. The glass composition of claim 14 , wherein the glass composition is substantially free of Na 2 O.

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 SiO 2 content is 60-62 weight percent.

19. The glass composition of claim 14 , wherein the glass composition is substantially free of B 2 O 3 .

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 SiO 2 ;
14-17 weight percent Al 2 O 3 ;
11-17.5 weight percent CaO;
6-9 weight percent MgO;
less than 1 weight percent K 2 O;
less than 1 weight percent Li 2 O;
0-1 weight percent TiO 2 ;
F 2 is present in an amount up to 0.5 weight percent; and
at least one rare earth oxide in an amount between 0.1 and 3.0 weight percent,

wherein the amount of Na 2 O is 0.09 weight percent or less, wherein the (Na 2 O+K 2 O+Li 2 O) 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 SiO 2 content is 60-62 weight percent.

26. The glass composition of claim 23 , wherein the glass composition is substantially free of B 2 O 3 .

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.

Assignees

• Ppg Ind Ohio Inc

Inventors

• Li Hong

Classifications

• C03C3/087 Primary

  containing calcium oxide, e.g. common sheet or container glass · CPC title

• C03C13/046

  Multicomponent glass compositions · CPC title

• C03C3/118

  containing aluminium · CPC title

• C03C2213/00

  Glass fibres or filaments · CPC title

• C03C13/00

  Fibre or filament compositions (manufacture of fibres or filaments C03B37/00) · CPC title