Ceramic colours
AssigneeMerck Patent GmbH
InventorsLukas HAMM, Carsten HANDROSCH, Marc HUNGER, Jens KERSTEN, Cairon PLATZER, Markus THONG, Khwan Khung LIM
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Abstract
The invention relates to ceramic colours comprising effect pigments and a sol-gel based glassy matrix for decoration of metallic, ceramic and glassy articles and to a process for the preparation of a ceramic glaze.
Claims22
A process for the preparation of glazed articles comprising:
- (a) preparing a ceramic colour by mixing at least one effect pigment based on flake-form substrates and/or uncoated flake-form substrates with a refractive index R.I.>1.5, at least one sol-gel component, optionally a solvent, optionally a binder, optionally an absorptive ceramic pigment and optionally at least one additive,
- (b) printing or coating the ceramic colour obtained in step (a) on a ceramic or metallic body,
- (c) drying the ceramic or metallic body obtained in step (b),
- (d) firing the ceramic or metallic body obtained in step (c) at a temperature in the range of 450° C.-1300° C.
A ceramic colour comprising at least one sol-gel component and at least one effect pigment based on flake-form substrates selected from the group consisting of mica flakes, natural mica flakes, glass flakes, Al2O3 flakes, SiO2 flakes, Fe2O3 flakes, B4C flakes, TiO2 flakes, SiC flakes, SixNyCz flakes with x=0.5-1.0;
- y=0.25-0.5;
- z=0.25-0.5, BN flakes and graphite flakes and/or at least one uncoated flake-form substrate with R.I.>1.5 selected from the group consisting of Al2O3 flake, SiC flakes, SixNyCz flakes;
- B4C flakes, BN flakes, graphite flakes, TiO2 flakes, and Fe2O3 flakes.
Dependencies are inferred from the claim text.