Nippon Steel Chemical & Material Co., Ltd.

Shinji Kawasoe

Tooru Inaguma

Shogo Konya

Masayuki Kasuya

Yasuhiro Tsumura

Masafumi Omizu

Takuzo Kako

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 &#x3b1;-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/&#x3bc;m)-3.00 (pieces/&#x3bc;m).

Honeycomb substrate for catalyst support, and catalytic converter for exhaust gas purification

A base for supporting a catalyst for exhaust gas purification, the base including a honeycomb structure obtained by superposing a metallic flat foil and a metallic wavy foil, characterized in that the wavy foil has offset portions where any adjoining two of the wave phases arranged in the axial direction of the honeycomb structure are offset from each other. The base is further characterized in that an oxide coating film has been formed in a given range of these offset portions which includes exposed edge surfaces that are exposed on the gas-inlet side, that the oxide coating film includes 30-99.9 mass % first alumina, with the remainder comprising at least one of second aluminas, Fe oxides, and Cr oxides, that the first alumina comprises &#x3b1;-alumina, that the second aluminas comprise one or more of &#x3b3;-, &#x3b8;-, &#x3c7;-, &#x3b4;-, &#x3b7;-, and &#x3ba;-aluminas.

Metal substrate for catalytic converter and catalyst carrier

A metal substrate for catalytic converter for purifying an exhaust gas includes a honeycomb core with metal flat foil and corrugated foil stacked in layers, and an oxide film having a thickness of 0.1 &#x3bc;m or more and 10 &#x3bc;m or less is formed in a predetermined range including an exposed end surface exposed toward the gas inlet side. The oxide film contains at least a first alumina including &#x3b1;-alumina and a Fe oxide. The &#x3b1;-alumina contains &#x3b1;-alumina with solid-solved Fe and &#x3b1;-alumina with no solid-solved Fe. In the oxide film, the content of the first alumina is 30% by mass or more and 99.5% by mass or less, the content of the Fe oxide is 0.5% by mass or more and 40% by mass or less, and the content of Fe is more than 7% by mass and 35% by mass or less.

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Tokyo, Japan

Shinji Kawasoe