Claims
- 1. A neutral gray colored glass composition having a base glass portion comprising:
- ______________________________________SiO.sub.2 66-75 percent by weightNa.sub.2 O 10-20CaO 5-15MgO 0-5Al.sub.2 O.sub.3 0-5K.sub.2 O 0-5______________________________________
- and a colorant portion consisting essentially of:
- ______________________________________Fe.sub.2 O.sub.3 (total iron) greater than 1.00 and up to 1.7 percent by weightFeO at least 0.27Se 0.001 up to but less than 0.005CoO 0.01-0.02______________________________________
- the glass having a luminous transmittance of no more than 32 percent, and a total solar infrared transmittance of less than 15 percent at a thickness of 3.9 millimeters.
- 2. The composition of claim 1 wherein the colorant portion includes greater than 1.0 to 1.3 percent by weight total iron expressed as Fe.sub.2 O.sub.3.
- 3. The composition of claim 1 wherein the FeO concentration is at least 0.30 weight percent.
- 4. The composition of claim 1 wherein the FeO concentration is at least 0.35 weight percent.
- 5. The composition of claim 1 wherein the colorant portion is selected so as to yield total solar infrared transmittance less than 13 percent at 3.9 millimeters thickness.
- 6. The composition of claim 1 wherein the colorant portion is selected so as to yield total solar infrared transmittance less than 10 percent at 3.9 millimeters thickness.
- 7. The composition of claim 1 wherein the color of the glass is characterized by dominant wavelengths in the range of 485 to 510 nanometers.
- 8. The composition of claim 7 wherein the color of the glass is characterized by an excitation purity of no higher than 15%.
- 9. The glass composition of claim 1 wherein the colorant portion is selected so as to yield a total solar energy transmittance of less than 25% at 3.9 mm thickness.
- 10. The composition as in claim 1 wherein said colorant portion includes 1.15-1.45 wt. % Fe.sub.2 O.sub.3, 0.25-0.40 wt. % FeO, 0.19-0.23 wt. % CoO, and 0.002-0.0035 wt. % Se, and further wherein said composition has a luminous transmittance of no greater than 25%, a total solar infrared transmittance of no greater than 15% and a total solar energy transmittance of no greater than 25% at 3.9 mm thickness.
- 11. The composition as in claim 10 wherein said colorant portion includes 1.18-1.26 wt. % Fe.sub.2 O.sub.3, 0.28-0.34 wt. % FeO, 0.195-0.215 wt. % CoO, and 0.0022-0.0031 wt. % Se, and further wherein said composition has a luminous transmittance of no greater than 21%, a total solar infrared transmittance of no greater than 12% and a total solar energy transmittance of no greater than 20% at 3.9 mm thickness.
- 12. An article of manufacture comprising a glass sheet having a base glass portion comprising:
- ______________________________________SiO.sub.2 66-75 percent by weightNa.sub.2 O 10-20CaO 5-15MgO 0-5Al.sub.2 O.sub.3 0-5K.sub.2 O 0-5______________________________________
- and a colorant portion consisting essentially of:
- ______________________________________Fe.sub.2 O.sub.3 (total iron) greater than 1.00 and up to 1.7 percent by weightFeO at least 0.27Se 0.001 up to but less than 0.005CoO 0.01-0.02______________________________________
- the glass having a luminous transmittance of no more than 32percent, and total solar infrared transmittance less than 15 percent at a thickness of 3.9 millimeters.
- 13. The article of claim 12 wherein the sheet has a thickness of 2 to 10 millimeters.
- 14. The article of claim 12 wherein the sheet has a thickness of 3 to 6 millimeters.
- 15. The article of claim 12 wherein a surface portion of the sheet includes at least 0.05 percent by weight SnO.sub.2.
- 16. The article of claim 12 wherein the luminous transmittance is less than 30 percent at a thickness of 3.9 millimeters.
- 17. The article of claim 12 wherein the colorant portion includes greater than 1.0 to 1.3 percent by weight total iron expressed as Fe.sub.2 O.sub.3.
- 18. The article of claim 12 wherein the FeO concentration is at least 0.30 weight percent.
- 19. The article of claim 12 wherein the FeO concentration is at least 0.35 weight percent.
- 20. The article of claim 12 wherein the colorant portion is selected so as to yield total solar infrared transmittance less than 13 percent at 3.9 millimeters thickness.
- 21. The article of claim 12 wherein the colorant portion is selected so as to yield total solar infrared transmittance less than 10 percent at 3.9 millimeters thickness.
- 22. The article of claim 12 wherein the color of the glass is characterized by dominant wavelengths in the range of 485 to 510 nanometers.
- 23. The article of claim 22 wherein the color of the glass is characterized by an excitation purity of no higher than 15%.
- 24. The article of claim 12 wherein the colorant portion is selected so as to yield a total solar energy transmittance of less than 25% at 3.9 mm thickness.
- 25. A neutral gray colored glass composition having a base glass portion comprising:
- ______________________________________SiO.sub.2 66-75 percent by weightNa.sub.2 O 10-20CaO 5-15MgO 0-5Al.sub.2 O.sub.3 0-5K.sub.2 O 0-5______________________________________
- and a colorant portion consisting essentially of:
- ______________________________________Fe.sub.2 O.sub.3 (total iron) greater than 1.00 and up to 2.2 percent by weightFeO at least 0.20Se 0.0005 up to but less than 0.005CoO 0.010-0.030______________________________________
- the glass having a luminous transmittance of no more than 35 percent, and a total solar infrared transmittance of less than 20 percent at a thickness of 3.9 millimeters.
- 26. The composition of claim 25 wherein the colorant portion includes greater than 1.0 to 1.7 percent by weight total iron expressed as Fe.sub.2 O.sub.3.
- 27. The composition of claim 25 wherein the FeO concentration is at least 0.27 weight percent.
- 28. The composition of claim 25 wherein the FeO concentration is between 0.27 to 0.50 weight percent.
- 29. The composition of claim 25 wherein the colorant portion is selected so as to yield total solar infrared transmittance less than 13 percent at 3.9 millimeters thickness.
- 30. The composition of claim 25 wherein the color of the glass is characterized by dominant wavelengths in the range of 485 to 580 nanometers.
- 31. The composition of claim 30 wherein the color of the glass is characterized by an excitation purity of no higher than 15%.
- 32. The glass composition of claim 25 wherein the colorant portion is selected so as to yield a total solar energy transmittance of less than 25% at 3.9 mm thickness.
- 33. The article as in claim 12 wherein said colorant portion includes 1.15-1.45 wt. % Fe.sub.2 O.sub.3, 0.25-0.40 wt. % FeO, 0.19-0.23 wt. % CoO, and 0.002-0.0035 wt. % Se, and further wherein said glass has a luminous transmittance of no greater than 25%, a total solar infrared transmittance of no greater than 15% and a total solar energy transmittance of no greater than 25% at 3.9 mm thickness.
- 34. The article as in claim 33 wherein said colorant portion includes 1.18-1.26 wt. % Fe.sub.2 O.sub.3, 0.28-0.34 wt. % FeO, 0.195-0.215 wt. % CoO, and 0.0022-0.0031 wt. % Se, and further wherein said glass has a luminous transmittance of no greater than 21%, a total solar infrared transmittance of no greater than 12% and a total solar energy transmittance of no greater than 20% at 3.9 mm thickness.
- 35. An article of manufacture comprising a glass sheet having a base glass portion comprising:
- ______________________________________SiO.sub.2 66-75 percent by weightNa.sub.2 O 10-20CaO 5-15MgO 0-5Al.sub.2 O.sub.3 0-5K.sub.2 O 0-5______________________________________
- and a colorant portion consisting essentially of:
- ______________________________________Fe.sub.2 O.sub.3 (total iron) greater than 1.00 and up to 2.2 percent by weightFeO at least 0.20Se 0.0005 up to but less than 0.005CoO 0.010-0.030______________________________________
- the glass having a luminous transmittance of no more than 35 percent, and total solar infrared transmittance less than 20 percent at a thickness of 3.9 millimeters.
- 36. The article of claim 35 wherein the sheet has a thickness of 2 to 10 millimeters.
- 37. The article of claim 35 wherein a surface portion of the sheet includes at least 0.05 percent by weight SnO.sub.2.
- 38. The article of claim 35 wherein the luminous transmittance is less than 30 percent at a thickness of 3.9 millimeters.
- 39. The article of claim 35 wherein the colorant portion includes greater than 1.0 to 1.7 percent by weight total iron expressed as Fe.sub.2 O.sub.3.
- 40. The article of claim 35 wherein the FeO concentration is at least 0.27 weight percent.
- 41. The article of claim 35 wherein the FeO concentration is between 0.28 to 0.50 weight percent.
- 42. The article of claim 41 wherein the Fe.sub.2 O.sub.3 concentration is from greater than 1.0 to 1.2 weight percent.
- 43. The article of claim 41 wherein the Fe.sub.2 O.sub.3 concentration is from 1.3 to 1.7 weight percent.
- 44. The article of claim 35 wherein the colorant portion is selected so as to yield total solar infrared transmittance less than 13 percent at 3.9 millimeters thickness.
- 45. The article of claim 35 wherein the color of the glass is characterized by dominant wavelengths in the range of 485 to 580 nanometers.
- 46. The article of claim 45 wherein the color of the glass is characterized by an excitation purity of no higher than 15%.
- 47. The article of claim 35 wherein the colorant portion is selected so as to yield a total solar energy transmittance of less than 25% at 3.9 mm thickness.
Parent Case Info
This is a continuation-in-part application of U.S. patent application Ser. No. 08/070,821, filed Jun. 3, 1993, now abandoned, which is a continuation-in-part application of U.S. patent application Ser. No. 07/762,516, filed Sep. 18, 1991, now abandoned which in turn is a continuation-in-part application of U.S. patent application Ser. Nos. 07/678,398, filed Apr. 1, 1991, now abandoned, and 07/644,051, filed Jan. 22, 1991, now abandoned, which in turn is a continuation-in-part application of U.S. patent application Ser. No. 07/603,599, filed on Oct. 25, 1990, now abandoned.
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Continuation in Parts (4)
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Number |
Date |
Country |
Parent |
70821 |
Jun 1993 |
|
Parent |
762516 |
Sep 1991 |
|
Parent |
678398 |
Apr 1991 |
|
Parent |
603599 |
Oct 1990 |
|