Grey glass composition

Details Grey glass composition Grey glass composition

2011-01-04

2011-01-04

Group, Karl E (Department: 1793)

Compositions: ceramic

Ceramic compositions

Glass compositions, compositions containing glass other than...

C501S070000

Reexamination Certificate

active

07863208

ABSTRACT:
A grey glass composition employing in its colorant portion at least iron (Fe2O3/FeO), cobalt and selenium is provided. The glass allows high visible transmission, and good IR absorption, while at the same time achieving desired grey color. In certain example embodiments, the colorant portion includes, or may consist essentially of:total iron (expressed as Fe2O3)0.20 to 0.35%selenium0.0002 to 0.0020%cobalt oxide0.0025 to 0.0060%titanium oxide  0 to 1.0%glass redox:<=.27; or 0.10 to 0.25.

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