C - Chemistry – Metallurgy – 03 – C
Patent
C - Chemistry, Metallurgy
03
C
C03C 17/09 (2006.01) B32B 15/00 (2006.01) C03C 17/00 (2006.01) C03C 17/22 (2006.01) C03C 17/245 (2006.01) C23C 16/40 (2006.01) C23C 16/56 (2006.01) C23C 30/00 (2006.01) C23C 14/02 (2006.01) C23C 14/34 (2006.01) C23C 14/56 (2006.01)
Patent
CA 2479698
Many applications, in particular in the domestic sector, require bodies which have a protective layer with a high scratch resistance and thermal stability. One typical example is glass-ceramic cooking surfaces of modern cooking hobs. The invention provides a corresponding protective layer which comprises at least one hard-material layer formed from a metal oxide and/or metal nitride and/or metal carbide and/or metal oxynitride and/or metal carbonitride and/or metal oxycarbonitride which has laterally closely cohesive, crystalline columns which grow perpendicular to the surface of the body and the lateral dimension of which is on average less than 1 µm, preferably less than 200 nm, and which predominantly has crystal orientations which, in the case of columnar growth, have little tendency to widen out, the surface roughness of the hard-material layer having an R a value of less than 50 nm, preferably less than 20 nm.
Dzick Juergen
Klippe Lutz
Krause Cora
Kirby Eades Gale Baker
Schott Ag
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