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US 2023/0159398 A1Published application
Cement mixtures for plugging multicellular filter bodies and methods of making the same
AssigneeCorning Incorporated
InventorsWeimin Hou, Patrick David Tepesch, Qing Zhou
Life of this patent
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Abstract
A cement mixture for application to a honeycomb body and a method of forming a plugged ceramic honeycomb body is provided. The cement mixture contains a plurality of inorganic particles including at least about 50% of a refractory material selected from at least one of alumina and zirconia and less than about 15% titania (by weight), a pore forming agent, an organic binder, and a liquid vehicle.
Claims20
A plugging cement mixture for application to a honeycomb body, the cement mixture comprising:
- a plurality of inorganic particles comprising at least about 50% of a refractory material selected from at least one of alumina and zirconia and less than about 15% titania (by weight);
- a pore forming agent;
- an organic binder;
- and
- a liquid vehicle.
2 more elements
A particulate filter comprising:
- a honeycomb structure that comprises a matrix of intersecting porous walls of a ceramic material that define channels extending from a first end to a second end;
- a plugging material disposed in at least a portion of the channels and at least one of the first end and second end, wherein the plugging material comprises at least about 50% of a refractory material selected from at least one of alumina and zirconia (by weight) and less than about 15% titania (by weight).
A method of forming a plugged ceramic honeycomb body, the method comprising:
- selectively inserting a cement mixture into at least one of a first end and second end of a first green honeycomb structure to form a first plugged green honeycomb structure, wherein the first green honeycomb structure comprises intersecting walls of a ceramic precursor material that define channels extending from a first end to a second end, wherein the ceramic precursor material comprises an aluminum containing oxide, and wherein the cement mixture comprises at least about 50% of a refractory material selected from at least one of alumina and zirconia (by weight) and less than about 15% titania (by weight);
- and
- heating the first plugged green honeycomb structure to a first temperature to convert the ceramic precursor material and the cement mixture into a sintered phase ceramic material to form a first plugged ceramic honeycomb structure.
Dependencies are inferred from the claim text.