Glass-ceramic article and enamel for the coating thereof
AssigneeEurokera S.N.C.
InventorsEmmanuel LECOMTE, Pablo VILATO
Life of this patent
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Abstract
A glass-ceramic article is at least partly coated with at least one layer of enamel, including a glass frit. The frit includes, expressed by weight, SiO2, 45-60%; Al2O3, 12-22%; B2O3, 12-22%; Li2O, 0-5%; Na2O, 0-2%; K2O, >2%; CaO, 0-4%; MgO, 0 - 4%; ZnO, 0-4%; BaO, 0-4%; ZrO2, 0-4%; and TiO2, 0-1%. The sum of oxides CaO+MgO+BaO+SrO+ZnO is at most 10%, preferably from 2 to 8%. A process can be used to obtain the article.
Claims13
A glass-ceramic article, at least partly coated with at least one layer of an enamel formed from a glass frit having the following composition, the proportions being expressed as weight percentages:
- SiO2 45-60%,
- Al2O3 12-22%,
- B2O3 12-22%,
- Li2O 0-5%,
- Na2O 0-2%
- K2O >2%
- CaO 0-4%,
- MgO 0-4%,
- ZnO 0-4%,
- BaO 0-4%,
- ZrO2 0-4%,
- TiO2 0-1%,
- the sum of the oxides CaO+MgO+BaO+SrO+ZnO moreover being less than or equal to 10%.
An enamel composition for a glass-ceramic article, formed from a glass frit having the following composition, the proportions being expressed as weight percentages:
- SiO2 45-60%,
- Al2O3 12-22%,
- B2O3 12-22%,
- Li2O 0-5%,
- Na2O 0-2%
- K2O >2%
- CaO 0-4%,
- MgO 0-4%,
- ZnO 0-4%,
- BaO 0-4%,
- ZrO2 0-4%,
- TiO2 0-1%,
- the sum of the oxides CaO+MgO+BaO+SrO+ZnO moreover being less than or equal to 10%.
Dependencies are inferred from the claim text.