Doduco Gmbh + Co. Dr. Eugen Durrwachter

Doduco Gmbh

Doduco Contacts and Refining Gmbh

Volker Behrens

Thomas Honig

Andreas Kraus

Karl E Saeger

Rainer Schmidberger

Roland Michal

Theodor Staneff

Helmut Heinzel

Johann Wenz

Havva Cinaroglu

Dirk Moog

Norbert Witulski

Stefan Dasler

Evelin Mahle-Moessner

Carl L Meyer

Evelin Mahle-Mössner

A method for producing a contact material on the basis of silver-tin oxide or silver-zinc oxide is disclosed. Tin oxide particles and/or zinc oxide particles are mixed with a powder of a metal different from silver. The mixture is heated beyond the melting point of the metal powder such that the tin oxide particles and/or zinc oxide particles are wetted with liquid metal. The mixture is exposed to an atmosphere containing oxygen and the metal is thereby oxidized. Thereafter, the mixture product formed by the oxidation step is embedded as a powder into a silver matrix. The product further relates to a corresponding contact material.

Method for producing a contact material on the basis of silver-tin oxide or silver-zinc oxide, and contact material

The method relates to a method for producing a strand-like, particularly band-like semi-finished part for electrical contacts, wherein the semi-finished part has a top side intended for making the electrical contact, said top side made from a silver-based composite material in which one or multiple metal oxides or carbon are embedded, and has a carrier layer supporting the composite material made of easily solderable or weldable ignoble metal, and method having the following steps: Powder-metallurgic production of a block made from the silver-based composite material, encasing of the block made of the composite material with a powder made from the easily solderable or weldable ignoble metal, compressing the block, encased by the metal powder, to condense the metal powder, sintering the compressed block in a reducing atmosphere or in an inert atmosphere or in a vacuum, avoiding the formation of fluid eutectics from the silver of the composite material and from the non-precious metal with which the block made from the silver-based composite material is encased, reshaping of the sintered block by extrusion pressing, creating a partial strand with a top side made from composite material and a bottom side made from non-precious metal.

Method for producing a semifinished product and semifinished product for electrical contacts and contact piece

Electrical contact material and method of making the same

Material for electric contacts taking silver-tin oxide or silver-zinc

Material for electric contacts of silver with carbon

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Bretten, Germany

Volker Behrens