High transmittance glass
AssigneePPG Industries Ohio, Inc.
InventorLarry J. Shelestak
Life of this patent
Estimating the term…
Abstract
A high transmittance glass includes: SiO2 in the range of 65 to 75 weight percent; Na2O in the range of 10 to 20 weight percent; CaO in the range of 5 to 15 weight percent; MgO in the range of 0 to 5 weight percent; Al2O3 in the range of 0 to 5 weight percent; K2O in the range of 0 to 5 weight percent; MnO2 in the range of 0.035 to 0.6 weight percent; FeO in the range of 0.0010 to 0.0030 weight percent; and Fe2O3 (total iron) in the range of 0.001 to 0.03 weight percent. The glass has a redox ratio in the range of 0.1 to 0.4.
Claims8
A high transmittance glass, consisting essentially of:
- SiO2
- 65 to 75 weight percent;
- Na2O
- 10 to 20 weight percent;
- CaO
- 5 to 15 weight percent;
- MgO
- 0 to 5 weight percent;
- Al2O3
- 0 to 5 weight percent;
- K2O
- 0 to 5 weight percent;
- MnO2
- 0.1 to 0.6 weight percent;
- FeO
- 0.0010 to 0.0030 weight percent;
- Fe2O3 (total iron)
- 0.001 to 0.03 weight percent;
- wherein the glass has a redox ratio in the range of 0.1 to 0.4.
A high transmittance glass, consisting essentially of:
- SiO2
- 71 to 75 weight percent;
- Na2O
- 13 to 14 weight percent;
- CaO
- 10 to 11 weight percent;
- MgO
- 2 to 3 weight percent;
- Al2O3
- 0.02 to 0.05 weight percent;
- K2O
- 0.01 to 0.02 weight percent;
- MnO2
- 0.18 to 0.25 weight percent;
- FeO
- 15 to 18 ppm;
- Fe2O3 (total iron)
- 0.007 to 0.008 weight percent;
- wherein the glass has a redox ratio in the range of 0.15 to 0.25.
Dependencies are inferred from the claim text.