Ceramic articles with bleed-through barrier and methods of manufacture thereof
AssigneeCorning Incorporated
InventorsMickaël Berrebi, David Henry
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Abstract
Methods for limiting bleed-through of aqueous catalyst solutions in ceramic articles are described herein. The methods include applying a hydrophobic cellulose derivative, such as ethylcellulose, to an exterior surface of a fired porous ceramic article. The aqueous catalyst solution is applied to the fired porous ceramic article, such that the hydrophobic cellulose derivative limits bleed-through of the aqueous catalyst solution through at least a portion of the ceramic article. Ceramic articles with skins that limit bleed-through of aqueous catalyst solutions are also described herein.
Claims19
A method for limiting bleed-through of aqueous catalyst solution in a fired porous ceramic article, the aqueous catalyst solution comprising catalyst materials comprising platinum, palladium, rhodium, or combinations thereof, the method comprising:
- applying a hydrophobic cellulose derivative to an exterior surface of a fired porous ceramic article.
A ceramic article comprising:
- a fired porous ceramic honeycomb body that comprises an outermost peripheral skin, wherein the outermost peripheral skin comprises a hydrophobic cellulose derivative.
A method of wash coating a porous ceramic article comprising an exterior surface, the method comprising:
- applying a hydrophobic cellulose derivative to at least a portion of the exterior surface of the porous ceramic article to create a treated portion of the exterior surface;
- heating the ceramic article for a time and at a temperature sufficient to at least partially dry the treated portion, wherein the treated portion is non-wettable;
- applying an aqueous catalyst solution comprising catalyst material to the porous ceramic article and contacting the treated portion with the aqueous catalyst solution, the aqueous catalyst solution comprising catalyst material comprising platinum, palladium, rhodium, or combinations thereof;
- and
- heating the ceramic article for a time and at a temperature sufficient to calcine catalyst material and to bond the catalyst material to an untreated portion of the porous ceramic article.
Dependencies are inferred from the claim text.