Colourless soda-lime glass composition
AssigneeArc France
InventorsHervé CHARLES, Rodolphe DELAVAL, Xavier IBLED
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Abstract
A colorless soda-lime glass composition comprising by weight from 68 to 78% SiO2, from 8 to 18% Na2O, from 0 to 10% K2O, from 7 to 12% CaO, from 0 to 10% MgO, from 0 to 10% ZnO, from 0 to 10% BaO, from 0 to 3% Al2O3, from 0 to 1% B2O3, from 0 to 1% SrO, less than 0.078% total sulfur expressed in the form of SO3, at most 0.12% total cerium expressed in the form of CeO2, from 50 to 1200 ppm total iron expressed in the form of Fe2O3, without the intentional addition of Mo, As, Sn and Sb species, and with a redox lower than 45.
Claims23
A colourless soda-lime glass composition, comprising, by weight, from 68 to 78% SiO2, from 8 to 18% Na2O, from 0 to 10% K2O, from 7 to 12% CaO, from 0 to 10% MgO, from 0 to 10% ZnO, from 0 to 10% BaO, from 0 to 3% Al2O3, from 0 to 1% B2O3, from 0 to 1% SrO, less than 0.078% total sulphur expressed in the form of SO3, at most 0.12% total cerium expressed in the form of CeO2, from 50 to 1,200 ppm total iron expressed in the form of Fe2O3, without intentional addition of the Mo, As, Sn and Sb species, and with a redox lower than 45.
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Dependencies are inferred from the claim text.