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US 6,672,108 B2Granted
Method of making glass with reduced Se burnoff
AssigneeGuardian Industries Corp.
InventorsKsenia A. Landa, Leonid Landa, Anthony V. Longobardo, Scott V. Thomsen
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Abstract
A method of making glass (e.g., grey in color in some embodiments, or otherwise colored in other embodiments) in a manner so as to reduce selenium (Se) burnoff. In some embodiments, Epsom salt(s) is added to the glass batch in order to reduce Se burnoff. The resulting glass product is useful, for example, in vehicle and/or architectural privacy glass applications.
Claims25
A method of making glass, the method comprising:
- processing a molten glass batch including Se, including adding Epsom salt to the batch in an amount sufficient to reduce Se burnoff during melting and/or processing, in order to form a resulting glass product comprising SiO2 and Se, so that the resulting glass product retains at least 30% of the Se originally present prior to melting.
A method of making glass, the method comprising:
- providing a glass batch including SiO2, Fe2O3, Epsom salt, and an original amount of Se;
- and
- forming a resulting glass product from the glass batch in a manner such that the resulting glass product includes at least 30% of the original amount of Se due at least to the presence of a sufficient quantity of the Epsom salt in the batch.
A method of making a grey colored glass, the method comprising:
- providing a molten glass batch comprising SiO2, Se, and Epsom salt;
- processing the glass batch in order to make a resulting grey colored glass product, the grey colored glass product including a base glass portion comprising:
- 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 comprising:
- Ingredient Amount Total iron (expressed as Fe2O3):
- 1.0 to 2.2% (wt. %) selenium (Se):
- 10 to 50 ppm cobalt oxide:
- 0.015 to 0.040% titanium oxide:
- 0 to 3.5% chromium oxide:
- 0 to 80 ppm;
- and wherein the Epsom salt is provided in the glass batch in sufficient quantity so that the resulting glass product retains at least 30% of the Se originally present in the batch.
8 more elements
Dependencies are inferred from the claim text.