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US 11,419,187 B2Granted
Glass-ceramic article and manufacturing process
AssigneeEurokera S.N.C.
InventorsFrancois Guillemot, Nicolas Chemin, Nathalie Diaz, Pablo Vilato
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Abstract
The present invention relates to an article comprising at least one glass-ceramic substrate, in particular a plate, intended, for example, to cover or receive at least one heating element, said substrate exhibiting, in at least one zone, a surface roughness such that the characteristic dimensions of the patterns forming said roughness are between 2 and 100 μm. The present invention also relates to an advantageous process for producing said substrate.
Claims11
An article, comprising:
- a heating element;
- and
- a glass-ceramic substrate,
- wherein the substrate covers or receives the heating element,
- wherein the substrate has, in at least one zone, a surface roughness such that characteristic dimensions of patterns forming the roughness are between 2 and 100 μm, and
- wherein the glass-ceramic substrate comprises, by weight percent:
- 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%;
- and
- P2O5:
- 0-8%.
30 more elements
Dependencies are inferred from the claim text.