US 6,632,540 B2 · Cementitious ceramic surface having controllable reflectance and texture

Abstract

An article is fabricated with a ceramic surface having a controllable surface finish. In one form, the ceramic is applied as a coating to a substrate article. Preferably, an aqueous coating mixture of phosphoric acid, alumina powder, and cordierite powder is prepared. The mixture is contacted to the surface of the article, and a mechanical overpressure is applied to the external surface of the mixture using a pressing tool. The surface character of the pressing tool, such as a smooth surface or an intentionally patterned surface, is reproduced on the surface of the final ceramic coating. The coating is heated to a moderate temperature to set the ceramic of the coating, and thereafter the coating is heated to a higher, but still intermediate temperature, to cure the coating.

Claims14

Dependent claims

An article having a ceramic surface whose texture and reflectance are controllable, the article prepared by method of:

providing an article having a surface to be coated;
preparing an aqueous mixture of a source of a reactive phosphate ion and a nonmetallic ceramic form of a cation reactive with phosphate ion to form a ceramic phosphate, wherein the nonmetallic ceramic form of the cation has at least two size ranges including at least a finer size range and a courser size range;
contacting the mixture to the surface of the article;
applying a mechanical overpressure to the mixture while the mixture is in contact with the surface of the article to form a coating;
setting the coating;
and
curing the coating.

4 more elements

Dependencies are inferred from the claim text.

Cementitious ceramic surface having controllable reflectance and texture

Life of this patent

Cementitious ceramic surface having controllable reflectance and texture

Life of this patent

Abstract

Claims14