Clear glass composition
AssigneeGuardian Industries Corp.
InventorsLeonid Landa, Ksenia A. Landa, Scott V. Thomsen, Richard Hulme
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Abstract
Glass is provided so as to have high visible transmission and/or fairly clear or neutral color. In certain example embodiments of making glass according to examples of the invention, the glass batch may include a base glass (e.g., soda lime silica base glass) and, in addition, by weight percentage: total iron (expressed as Fe2O3): 0.01 to 0.30% erbium oxide (e.g., Er2O3): 0.01 to 0.30% cerium oxide (e.g., CeO2): 0.005 to 0.30%. Optionally, neodymium oxide (e.g., Nd2O3) may also be provided in the glass in certain example embodiments. In other embodiments, the cerium oxide may be replaced with or supplemented by NaNO3 or some other nitrate(s) as an oxidizer.
Claims12
Glass comprising:
- Ingredient
- wt. %
- a base glass portion comprising:
- SiO2
- 67–75%
- Na2O
- 10–20%
- CaO
- 5–15%
- a colorant portion comprising:
- total iron (expressed as Fe2O3)
- 0.054 to 0.30%
- erbium oxide
- 0.01 to 0.30%
- cerium oxide
- 0 to 0.30%
- wherein the glass has visible transmission of at least 80%, a transmissive a* color value of −1.0 to +1.0, and a transmissive b* color value of −1.0 to +1.5.
Dependencies are inferred from the claim text.