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US 2024/0286950 A1Published application
Electronically conductive enamel coating
AssigneeTechnische Universität Bergakademie Freiberg
InventorsTorsten Lorenz, Sabine Hönig
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Abstract
The present invention relates to a composition for producing an enamel functional layer, especially an antistatic layer or an electronically conductive corrosion protection layer, to the use of this composition, to a process for producing an enamel coating on a substrate, and to articles having a base body and an enamel functional layer.
Claims7
A kit comprising
- (1) a composition for producing an enamel functional layer, comprising
- (i) a frit for forming an enamel matrix,
- (ii) particles comprising at least one metal (a), where the particles (ii) have a d50 value of 5 μm to 200 μm, determined by laser particle size analysis,
- (iii) an oxide of a metal (b) or a precursor for forming an oxide of a metal (b),
- where constituent (iii) is a constituent of the frit (i),
- or is in the form of particles having a d50 value of 1 μm to 5 μm, determined by laser particle size analysis,
- where the standard electrode potential of metal (b) is more positive than the standard electrode potential of metal (a),
- where the proportion of particles (ii) is 10% to 100% based on the weight of the frit (i)
- (2) and a composition for producing an enamel cover layer, where the composition (2) comprises
- a frit for forming an enamel matrix,
- an oxide of a metal (b) or a precursor for forming an oxide of a metal (b), where the oxide of metal (b) or the precursor for forming an oxide of a metal (b) is identical to constituent (iii) of composition (1),
- where composition (2) does not contain constituent (ii).
9 more elements
An article comprising
- a base body,
- an enamel functional layer comprising
- (i) an enamel matrix and, embedded in the enamel matrix,
- (ii) particles comprising at least one metal (a),
- (iii) crystals, formed through reduction of an oxide, of a metal (b) having a standard electrode potential more positive than the standard electrode potential of metal (a),
- where the enamel matrix (i) comprises an oxide formed by oxidation of metal (a),
- an enamel cover layer arranged on the surface of the enamel functional layer facing away from the base body, where the concentration of particles (ii) comprising at least one metal (a) is lower in the enamel cover layer than in the enamel functional layer, and the enamel cover layer comprises crystals, formed through reduction of an oxide, of a metal (b) having a standard electrode potential more positive than the standard electrode potential of metal (a),
- optionally an enamel base layer arranged between the surface of the base body and the enamel functional layer, where the concentration of particles (ii) comprising at least one metal (a) is lower in the enamel base layer than in the enamel functional layer, and the enamel base layer comprises crystals, formed through reduction of an oxide, of a metal (b) having a standard electrode potential more positive than the standard electrode potential of metal (a).
5 more elements
7-10. (canceled)
Dependencies are inferred from the claim text.