Abstract: 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 ?-alumina, that the second aluminas comprise one or more of ?-, ?-, ?-, ?-, ?-, and ?-aluminas.

Abstract: 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 ?m or more and 10 ?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 ?-alumina and a Fe oxide. The ?-alumina contains ?-alumina with solid-solved Fe and ?-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.

Abstract: 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.

Abstract: 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 ?m or more and 10 ?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 ?-alumina and a Fe oxide. The ?-alumina contains ?-alumina with solid-solved Fe and ?-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.

Abstract: 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 ?-alumina, that the second aluminas comprise one or more of ?-, ?-, ?-, ?-, ?-, and ?-aluminas.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: A Cr trapping agent is disposed so that it contacts with constituting components of the substrate containing Cr. As the Cr trapping agent, an element or Ag is used, wherein the element is stronger in basicity than alkali metals or alkaline earth metals. Since the Cr trapping agent prevents transfer of Cr towards the alkali metals or alkaline earth metals, the reaction between Cr and alkali metals or alkaline earth metals is prevented.

Abstract: Disclosed are: an exhaust gas purification catalyst which is an inexpensive three-way catalyst, which contains a reduced amount of an expensive noble metal, particularly does not use Pt, and contains no expensive rare earth element, and which has the same level of catalytic activity as that of a conventional one; and a catalytic honey-comb structure for exhaust gas purification. Specifically disclosed are: an exhaust gas purification catalyst comprising (?) an oxide M(Co1-yFey)O3-? [wherein M represents a combination of an element substantially selected from Ba and Sr; y represents a number of 0 to 1; and ? represents a value that is so defined as to satisfy the charge neutrality condition] carrying one or two noble metals selected from Pd and Rh and (B) active alumina carrying one or two noble metal selected from Pd and Rh; and a catalytic honey-comb structure for exhaust gas purification, which is produced by wash-coating the exhaust gas purification catalyst onto a ceramic- or metal-made honey-comb.

Abstract: The present invention provides an exhaust gas purification catalyst and catalyst member superior in exhaust gas purification performance and heat resistance, low in cost, and reducing use of precious metals, that is, an exhaust gas purification catalyst, and a catalyst member using the same, comprising a composite oxide having a substantially perovskite type crystalline structure and expressed by the following formula <1> on which one or more elements selected from at least Pt, Pd, and Rh are carried: A?B1-xB?xO3-???<1> (where, A indicates one element or a combination of two elements selected substantially from Ba and Sr, B indicates one element or a combination of two elements selected substantially from Fe and Co, B? indicates one element or a combination of two or more elements selected substantially from Nb, Ta, and Ti, ? is 0.95 to 1.05, x is 0.05 to 0.3, and ? is a value determined so as to satisfy charge neutral conditions).

Abstract: The present invention provides an Fe—Cr—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—Cr—Al based stainless steel sheet or high Al-containing double layered sheet characterized by comprising, by weight, Cr: 10-30% and Al: >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—Cr—Al based stainless steel sheet.

Abstract: Use of a metallic material containing chromium as a substrate of an exhaust gas purifying catalyst has a problem that the chromium contained in the substrate migrates to a catalytically active component and reacts with the catalytically active component to reduce exhaust gas purification performance. Thus, a film which inhibits the chromium contained in the substrate from migrating is arranged on the substrate's surface. The film is desirably formed by oxidizing a substrate in the air. It is also desirable that a substrate containing aluminum therein be oxidized to cause aluminum contained in the substrate to separate out and thereby form an alpha-alumina film. The film is preferably such that, when the exhaust gas purifying catalyst is heated at 850° C. in the air for 300 hours, the amount of chromium migrated to the catalytically active component is controlled to 0.5 percent by weight or less based on the catalytically active component.

Abstract: The present invention provides an Fe—Cr—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—Cr—Al based stainless steel sheet or high Al-containing double layered sheet characterized by comprising, by weight, Cr: 10-30% and Al: >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—Cr—Al based stainless steel sheet.

Abstract: A Cr trapping agent is disposed so that it contacts with constituting components of the substrate containing Cr. As the Cr trapping agent, an element or Ag is used, wherein the element is stronger in basicity than alkali metals or alkaline earth metals. Since the Cr trapping agent prevents transfer of Cr towards the alkali metals or alkaline earth metals, the reaction between Cr and alkali metals or alkaline earth metals is prevented.

Abstract: The present invention provides an Fe—Cr—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—Cr—Al based stainless steel sheet or high Al-containing double layered sheet characterized by comprising, by weight, Cr: 10-30% and Al: >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—Cr—Al based stainless steel sheet.

Abstract: In an electrically heated catalyst support, when necessary, reinforcing layers are formed on the inner circumference and the outer circumference of a honeycomb body. On an end surface of the honeycomb body on the downstream side of exhaust gas, there are provided a plurality of insulating ceramic bars on the outer circumferential layer and/or the inner circumferential layer in such a manner that the insulating ceramic bars cross a non-reinforcing layer of the honeycomb body. End portions of the ceramic bars are held on the reinforcing layer by pins or a ring-shaped holding member joined to an external metallic cylinder. Due to the foregoing arrangement, telescoping of the honeycomb body in the direction of gas flow and damage of the metallic foil can be prevented without obstructing the generation of heat when electricity is supplied. Accordingly, durability of the catalyst support can be remarkably enhanced.

Abstract: 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.

Abstract: The present invention provides a joined product of heat-resisting alloys, comprising heat-resisting alloy sheets or foils optionally having an oxide film on their surfaces, said heat-resisting alloy sheets or foils being joined to each other at their surfaces facing each other with an composite having a melting point in the range of from 800.degree. to 1400.degree. C. The joined product of heat-resisting alloys is produced by putting the above-described composite oxide on a heat-resisting alloy in a sheet or foil form at its portion to be joined, putting another heat-resisting alloy in a sheet or foil form and heating the resulting assembly at a temperature of 9/10 or more of the melting point of the composite oxide.

Abstract: The present invention aims to produce a metallic carrier which enables a catalyst to be activated in a short time. In mutually joining an insulated heat resisting alloy and a heat resisting alloy having an insulating film, particularly composed mainly of alumina, a joining material of a laminate, formed by laminating a strongly reducing metal, which can thermodynamically reduce alumina, and a brazing material to each other, is disposed so that the strongly reducing metal comes into contact with the insulated heat resisting alloy, and the resultant laminate is heated in a non-oxidizing atmosphere to carry out a brazing treatment. This enables only portions in the honeycomb structure, where electrically conductive paths are to be formed, can be joined, and, at the same time, heat resisting alloys having a surface covered with an insulating oxide film can be firmly joined with the resultant joint having an electrical conductivity.