Tdk Electronics Company, Limited

Kazuhide Aue

Yasumichi Tokuoka

Shinji Umeki

Shunjiro Saito

Makoto Kobayashi

Akio Nakamura

Nobuei Shimojo

An insoluble electrode for electrolysis which comprises repeatedly coating and baking a slurry of palladium oxide containing a platinum compound which can be thermally decomposed to form platinum metal, optionally the other metal salt or oxide in a solvent and a solution of a platinum compound which can be thermally decomposed to form platinum metal in a solvent on a conductive substrate in optional order at two or more times.

Process for preparing insoluble electrode

A powder magnetic material for use as a magnetic recording medium and a method of its manufacture are disclosed. More particularly, the disclosed powder magnetic material is adapted to provide a magnetic recording medium of low electric resistance. In particular, an alloy of cobalt and at least one element selected from the group consisting of vanadium, molybdenum, copper, manganese, nickel, zinc and iron is deposited onto the surface of particles of magnetic iron oxides such as Fe.sub.3 O.sub.4 or .gamma.Fe.sub.2 O.sub.3 to provide a powdered magnetic material of high coercivity, high magnetic flux density and low electric resistance.

Magnetic powder material comprising iron oxide particles with a

A method of producing a powder magnetic material for use as a magnetic recording medium is disclosed. More particularly, the disclosed powder magnetic material is adapted to provide a magnetic recording medium of low electrical resistance. In particular, an alloy of cobalt and at least one element selected from the group consisting of vanadium, molybdenum, copper, maganese, nickel, zinc and iron are deposited onto the surface of particles of magnetic iron oxides such as Fe.sub.3 O.sub.4 or .gamma.Fe.sub.2 O.sub.3. Powdered magnetic material of high coercivity, high magnetic flux density and low electrical resistance is obtained.

Method of making powdered magnetic iron oxide material

An electrode comprises a conductive substrate which is coated with 7 to 50 mole % of a total combination of palladium oxide and ruthenium oxide and 93 to 50 mole % of tin oxide as the main components, wherein less than 40 mole % of said tin oxide is substituted with titanium oxide.

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Chiba, Japan

Kazuhide Aue