Catalytic converter and method for producing the same
AssigneeSiemens Aktiengesellschaft
InventorsRainer Stoephasius, Wieland Mathes, Ronald Neufert, Helmut Schmelz, Jurgen Zurbig
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Abstract
A catalytic converter includes a metal carrier body, an adhesion-promoting intermediate layer in the form of an oxide film applied to the carrier body and a catalytically active layer applied to the intermediate layer. A method for producing a catalytic converter includes heating a metal carrier body in an oxidizing atmosphere to form an adhesion-promoting intermediate layer in the form of an oxide film on the carrier body and applying a catalytically active layer to the intermediate layer.
Claims19
A method for producing a catalytic converter, which comprises:
- heating a metal carrier body in an oxidizing atmosphere to form an adhesion-promoting intermediate layer in the form of an oxide film on the metal carrier body;
- depositing a catalytically active layer directly on the intermediate layer formed in the heating step;
- and
- subsequently calcining the metal carrier body together with the intermediate layer and the catalytically active layer.
A method for producing a catalytic converter, which comprises:
- depositing a mixture of particles on a metal carrier body;
- heating the metal carrier body in an oxidizing atmosphere at a temperature of from 700.degree. to 1000.degree. C. over a given period of time to form an adhesion-promoting intermediate layer in the form of an oxide film on the metal carrier body with sintered particles on the metal carrier body;
- depositing a catalytically active layer on the intermediate layer directly;
- and calcining the metal carrier body together with the intermediate layer and the catalytically active layer.
Dependencies are inferred from the claim text.