Nippon Steel Corporation

Toyota Jidosha Kabushiki Kaisha

Nippon Steel Chemical & Material Co., Ltd.

Nippon Steel & Sumikin Materials Co., Ltd.

Shogo Konya

Tooru Inaguma

Yasuhiro Tsumura

Kouji Yoshizaki

Akira Okamoto

Masayuki Kasuya

Masafumi Omizu

Shinji Kawasoe

Hirokazu Taniguchi

Kazuhiro Sakurai

Hiroaki Sakamoto

Toru Inaguma

Masahiko Ogai

Takuzou Kako

Motonori Tamura

Yuuji Nakashima

Kouki Yotsuya

Toshio Iwasaki

Takuzo Kako

Kei Muramatsu

Kazuki Miyamoto

Yasuhide Goto

Souhei Nozawa

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.

A honeycomb core for carrying a catalyst includes a flat metal foil and a corrugated metal foil, which are layered. The corrugated foil is configured by repeating a concavo-convex shaped part including a first top surface that is in contact with one of the flat foils, a second top surface that is in contact with another flat foil and is disposed at a position where the second top surface avoids the first top surface, and an inclined leg surface that has one end connected to the first top surface through a first bent part and another end connected to the second top surface through a second bent part, and extends in a direction inclined with respect to the first top surface and the second top surface, and has an offset part having different wave phases between front and rear in an axial direction of the honeycomb core.

Honeycomb core for carrying catalyst and catalytic converter

A metal substrate for catalytic converter is characterized by: a flat foil and a corrugated metal foil arranged on a gas inlet side end section being joined to each other; the flat foil and the corrugated metal foil arranged in an outer circumferential joining section being joined to each other, said outer circumferential joining section being connected to an end section of the gas inlet side end section in the axial direction; an outer jacket and the honeycomb core being joined by interposing a bonding layer in the gas outlet side end section area P fulfilling formula (A), when P is the length of the bonding layer in the axial direction; a corrugated metal foil having an impact mitigating section; the impact mitigating section being formed in an area corresponding to at least the gas inlet side end section and the outer circumferential joining section.2 mm&#x2264;&#x2264;50 mm&#x2003;&#x2003;(A):

Metal substrate for catalytic converters

The present invention provides an Fe&#x2014;Cr&#x2014;Al based stainless steel sheet and double layered sheet having a high Al content of greater than 6.5%, honeycomb bodies employing the stainless steel sheet or double layered sheet, and a process for fabrication of the steel sheet or double layered sheet. The sheet is a high Al-containing Fe&#x2014;Cr&#x2014;Al based stainless steel sheet or high Al-containing double layered sheet characterized by comprising, by weight, Cr: 10-30% and Al: &#x3e;6.5%-15%. Preferably, the steel sheet further comprises either or both Ti: 0.02-0.1% and Nb: 0.02-0.3%, and also comprises La: 0.01-0.1%, Ce: 0.01-0.1% and P: 0.01-0.05%. It also preferably comprises Cu: 0.01-1.0% by weight, and preferably further comprises Mg: 0.001-0.1% by weight. There is also provided a honeycomb body fabricated using the Fe&#x2014;Cr&#x2014;Al based stainless steel sheet.

High Al stainless steel sheet and honeycomb bodies employing them

Device for purifying exhaust gas of internal combustion engine

The electrically heated catalytic converter of the present invention has a substrate, for a catalyst, which is formed as a laminated assembly of corrugated metal sheets and plain metal sheets. The corrugated metal sheet has an insulating coating made of an alumina Al.sub.2 O.sub.3, and the plain metal sheet has no insulating coating. Local conductive connections are formed between the layers of the metal sheets by soldering the metal sheets using strips of zirconium solder foils interposed between the layers of the metal sheets. The strips of solder foils are arranged in such a manner that the strips of solder foil disposed on both sides of the corrugated metal sheet defines a single electric path in the corrugated metal sheet which connects the solder foils on both sides of the corrugated metal sheet. Since the solder foils on both sides of the corrugated metal sheet are connected by only one electric path, the electric resistance between the solder foils is maintained at a relatively high value and the local conductive connections can be heated by a relatively small electric current.

Electrically heated catalytic converter for an engine

Joined product of heat-resisting alloys and method for joining

Method for brazing heat resisting alloy having on its surface insulating

A method of metallizing an oxide ceramic with excellent hermetic sealing and brazing properties, comprising the steps of applying to a sintered oxide ceramic a first paste prepared by mixing with an organic vehicle a powder mixture composed of 70 to 95 wt % of a wolfram powder having an average particle diameter of 10 .mu.m or less and 30 to 5 wt % of a glass powder having an average particle diameter of 10 .mu.m or less and a melting point of from 1100.degree. to 1300.degree. C.; drying the first paste-applied ceramic to form a primary coating on the ceramic; applying to the primary coating a second paste prepared by mixing with an organic vehicle one or more powders selected from the group consisting of nickel, nickel oxide, and nickel salt powders; drying the second paste-applied ceramic to form a final coating on the primary coating; and firing the ceramic having the primary and the final coatings thereon at a temperature of from 1200.degree. to 1400.degree. C. in an atmosphere having a H.sub.2 /H.sub.2 O ratio higher than 1 and lower than 100000 in terms of partial pressure ratio.

Method of metallizing oxide ceramic with excellent hermetic sealing and

Growing community of inventors

Tokyo, Japan

Shogo Konya