Glass-ceramic article comprises a light-scattering inorganic coating, where the coating contains a baked layer of glass ceramic particles, or a baked sol-gel matrix embedded with light-scattering particles, which are e.g. silicon dioxide

摘要

Glass-ceramic article comprises a light-scattering inorganic coating, where the coating contains a baked layer of glass ceramic particles with a particle size of 0.5-2 mu m, or a baked sol-gel matrix embedded with light-scattering particles with a particle size of 0.2-2 mu m. Independent claims are included for: (1) producing a light-scattering inorganic layer on the ceramic article, comprising applying a coating composition (containing a suspension of the ceramic glass with a particle size of 0.5-10 mu m in a volatilizable suspension or a suspension of particles from glass-ceramics, silicon dioxide, titanium dioxide, zirconium dioxide, or other inorganic pigments with a particle size of 100 nm to 10 mu m, and are stable in the baking temperature (where the particle size of the nanoparticles relates to the agglomerates of formed primary particles)), in the sol-gel matrix of the glass ceramic article or in the glass ceramic from a convertible glass; optionally drying and then baking, where in the case of the article from the convertible glass, the convertible glass is simultaneously ceramized with the baking; and (2) the coating composition.