Grey glass composition including erbium
AssigneeGuardian Industries Corp.
InventorsKsenia A. Landa, Leonid Landa, Scott V. Thomsen, Anthony V. Longobardo
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Abstract
A grey glass composition employing as its colorant portion at least iron (Fe2O3/FeO) and erbium oxide (e.g., Er2O3), and also preferably selenium and cobalt. An exemplary colorant portion for use in a glass composition (with a soda lime silica or other suitable base glass) includes, by weight percentage: 1 Total iron (expressed as Fe2O3): 0.1 to 0.6% erbium oxide (e.g., Er2O3): 0.3 to 1.5% selenium (Se): 0.0002 to 0.0010% cobalt oxide (e.g., Co3O4): 0.0005 to 0.0018% titanium oxide (e.g., TiO2): 0.0 to 1.0% boron oxide (e.g., B2O3): 0.0 to 2.0% The resulting glass may exhibit high visible transmittance (Lta), while at the same time low UV and IR transmittance.
Claims22
A grey glass comprising:
- a base glass portion comprising:
- 13 Ingredient wt. % SiO2 67-75% Na2O 10-20% CaO 5-15% MgO 0-5% Al2O3 0-5% K2O 0-5% BaO 0-1%
- and a colorant portion consisting essentially of:
- 14 total iron (expressed as Fe2O3) 0.10 to 0.60% erbium oxide 0.30 to 1.50% selenium (Se) 0.0002 to 0.0010% cobalt oxide 0.0005 to 0.0018% titanium oxide 0.0 to 1.0% boron oxide 0.0 to 2.0%
- wherein the grey glass has a dominant wavelength in the range of from 435 nm to 570 nm.
A grey colored glass comprising:
- 16 Ingredient Wt. % SiO2 67-75% Na2O 10-20% CaO 5-15% MgO 0-5% Al2O3 0-5% K2O 0-5% BaO 0-1% total iron (expressed as Fe2O3) 0.10 to 0.60% erbium oxide 0.30 to 1.50% Se 0.0002 to 0.0010% cobalt oxide 0.0005 to 0.0018% titanium oxide 0.0 to 1.0% boron oxide 0.0 to 2.0%.
A glass composition comprising:
- a base glass composition;
- and
- a colorant portion consisting essentially of:
- 17 total iron (expressed as Fe2O3) 0.1 to 0.6% erbium oxide 0.50 to 1.20% Se 0.0002 to 0.0010% cobalt oxide 0.0007 to 0.0018% titanium oxide 0.0 to 1.0% boron oxide 0.0 to 2.0%.
Dependencies are inferred from the claim text.