Grey glass composition

Details Grey glass composition Grey glass composition

2006-11-14

2006-11-14

Sample, David (Department: 1755)

Compositions: ceramic

Ceramic compositions

Glass compositions, compositions containing glass other than...

C501S070000, C501S071000

Reexamination Certificate

active

07135425

ABSTRACT:
A grey glass composition employing as its colorant portion at least iron (Fe2O3/FeO), cobalt and possibly erbium oxide (e.g., Er2O3) is provided. The glass enables high visible transmission, and satisfactory IR absorption, while at the same time achieving desired grey color. In certain example embodiments, the colorant portion includes:total iron (expressed as Fe2O3):<=0.35%erbium oxide (e.g., Er2O3):0 to 0.3%selenium (Se):<=15 ppmcobalt oxide (e.g., Co3O4):5 to 60 ppmglass redox:>=0.35.In other example embodiments, the glass may include higher total iron and/or a lower minimum redox.

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