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US 8,127,571 B2Granted
Method of refining a lithium aluminosilicate glass and glass-ceramic obtained
AssigneeEurokera S.N.C.
InventorsDorothee Martin, Yannick Lefrere
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Abstract
The present invention relates to a method of refining lithium aluminosilicate glass capable of being controllably ceramized and free of arsenic oxide, antimony oxide and tin oxide, in which at least 0.05% by weight of at least one sulfide is added to the glass batch materials and said materials are melted at a temperature below 1750° C. The invention also relates to the glass-ceramics obtained from said colored glass, especially glass colored by vanadium oxide, and cooktops and cooking utensils including such glass-ceramics.
Claims11
A method of refining a lithium aluminosilicate glass, comprising:
- (A) adding a sulfide to glass batch materials in an amount of at least 0.05% by weight relative to a total weight of the glass batch materials;
- and
- (B) melting the materials at a temperature below 1750° C.;
- wherein
- the lithium aluminosilicate glass is free of arsenic oxide, antimony oxide, and tin oxide;
- the lithium aluminosilicate glass is a glass comprising constituents below in amounts specified in percentages by weight:
- SiO2
- 52-75%
- Al2O3
- 18-27%
- Li2O
- 2.5-5.5%
- K2O
- 0-3%
- Na2O
- 0-3%
- ZnO
- 0-3.5%
- MgO
- 0-3%
- CaO
- 0-2.5%
- BaO
- 0-3.5%
- SrO
- 0-2%
- TiO2
- 1.2-5.5%
- ZrO2
- 0-3%
- P2O5
- 0-8%.
29 more elements
Dependencies are inferred from the claim text.