Honeycomb substrate for catalyst support, and catalytic converter for exhaust gas purification
AssigneeNippon Steel Chemical & Material Co., Ltd.
InventorsShinji KAWASOE, Tooru INAGUMA, Takuzo KAKO
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Abstract
Adhesion of a catalyst layer and an oxide film in a honeycomb substrate for catalyst support is improved. A honeycomb substrate for catalyst support used in purification of exhaust gas includes a honeycomb body and an oxide film that is formed on the surface of the honeycomb body and that has α-alumina as a main component. The oxide film includes multiple oxide projections that are formed to be dispersed on the film surface and that include a contracted shape in which the width becomes narrower near the honeycomb body, and the density of the projection formations on the film surface is 0.20 (pieces/m2)-3.00 (pieces/m2).
Claims5
A honeycomb substrate for a catalyst support used for exhaust gas purification comprising:
- a honeycomb body;
- and
- an oxide film having α-alumina as a main component formed on a surface of the honeycomb body, wherein
- the oxide film includes a large number of oxide projections formed on a surface of the film in a scattered manner, the large number of oxide projections each having a tapered shape portion with a width decreasing toward the honeycomb body, the large number of oxide projections are formed to let a catalyst layer adhere to the oxide film without an adhesive layer, and
- a formation density of the oxide projections on the film surface is 0.20 (projections/m2) or more and 3.00 (projections/m2) or less.
Dependencies are inferred from the claim text.