Grey glass composition

• US 7,622,410 B2
• Filed: 02/23/2005
• Issued: 11/24/2009
• Est. Priority Date: 02/23/2005
• Status: Active Grant

• Current Assignee: Guardian Glass LLC (KOCH Industries Incorporated)
• Original Assignee: Guardian Industries Corporation (KOCH Industries Incorporated)
• Inventors: Longobardo, Anthony V., Thomsen, Scott V., Landa, Ksenia A., Landa, Leonid
• Primary Examiner(s): Lorengo; Jerry
• Assistant Examiner(s): Hoban; Matthew E
• Application Number:
  US11/062,741
• Publication Number:
  US 20060189472A1
• Time in Patent Office: 1,735 Days
• Field of Search: 501/71, 501/64, 501/70
• US Class Current: 501/71
• CPC Class Codes: C03C 3/087 containing calcium oxide, e.g. common sheet or container glass
• CPC Class Codes: C03C 3/095 containing rare earths

Abstract

A grey glass composition employing in its colorant portion, in certain example embodiments, iron, cobalt, nickel, and at least one of erbium and titanium. The use of erbium and/or titanium has been found to improve coloration of the grey glass, and improve tunability of the same. In certain example embodiments, the ratio of cobalt oxide to nickel oxide is from 0.22 to 0.30 in order to achieve desired coloration in certain example embodiments.

Claims

1. A grey glass comprising:

a base glass portion comprising;

2. The glass of claim 1, wherein the glass comprises erbium oxide from 0.2 to 0.7%.

3. The glass of claim 1, wherein the glass comprises TiO₂ from 0.01 to 0.20%.

4. The glass of claim 1, wherein the glass comprises TiO₂ from 0.02 to 0.05%.

5. The glass of claim 1, wherein the glass has a visible transmission of from 12-18%.

6. The glass of claim 1, wherein the glass has an x color value of from 0.286 to 0.299, a y color value of from 0.304 to 0.323, and a dominant wavelength of from 470-510 nm.

7. The glass of claim 1, wherein the glass has an x color value of from 0.290 to 0.297, and a y color value of from 0.310 to 0.322.

8. The glass of claim 1, wherein the glass has a redox of from 0.26 to 0.30.

9. The glass of claim 1, wherein the ratio of cobalt oxide/nickel oxide is from 0.24 to 0.29.

10. The glass of claim 1, wherein the ratio of cobalt oxide/nickel oxide is from 0.25 to 0.28.

11. The glass of claim 1, wherein the colorant portion consists essentially of, in addition to the erbium oxide:

12. The glass of claim 1, wherein the glass is substantially free of cerium oxide, and includes less than 1 ppm of Se and/or no Se.

13. A grey glass comprising:

a base glass portion comprising;

14. The glass of claim 13, wherein a ratio of cobalt oxide/nickel oxide is from 0.22 to 0.30.

15. The glass of claim 13, wherein the glass comprises erbium oxide from 0.2 to 0.7%.

16. The glass of claim 13, wherein the glass comprises TiO₂ from 0.01 to 0.20%.

17. The glass of claim 13, wherein the glass comprises TiO₂ from 0.02 to 0.05%.

18. The glass of claim 13, wherein the glass has an x color value of from 0.286 to 0.299, a y color value of from 0.304 to 0.323, and a dominant wavelength of from 470-510 nm.

19. A grey glass comprising: