Robert Boschgmbh

Max-Planck-Gesellschaft Zur F&#xf6;rderung Der Wissenschaften E. V.

502 Robert Bosch Gmbh

Waldemar Draxler

Horst Boeder

Friedrich J Esper

Gerhard Schneider

Gunter Petzow

Wilfried Aichele

Thomas Christmann

Andreas Buchel

Klaus-Dieter Durst

Ernst-Theo Henig

Helmut Kronmuller

Adnan Okumus

Uwe Laukant

A magnetically soft powder composite material is described, which is composed of at least 99.4 wt. % of a pure iron powder, a phosphatized iron powder, or an iron alloy powder and 0.05 wt. % to 0.6 wt. % of a soft ferrite powder and which is primarily suited for use in rapidly switching solenoid valves in motor vehicle engines. Furthermore, a method for manufacturing such a magnetically soft powder composite material includes the following method steps:

Magnetically soft powder composite material, method for manufacturing same, and its use

A sintered, magnetically soft composite is proposed, especially for use in solenoid valves, and a process for producing such a composite, in which initially a starting mixture from which the magnetically soft composite is formed after sintering is produced, having a ferromagnetic, especially powdery first starting component ( ) as main constituent, and a ferritic second starting component ( ) as secondary constituent, as well as possibly a pressing aid. After the starting mixture is sintered, the second starting component ( ) is present in the produced composite at least largely as grain boundary phase. The proposed manufacturing process includes the process steps: provision of the starting mixture; mixing of the starting mixture; compression of the starting mixture in a cavity mold under increased pressure; removal of the binder from the compressed starting mixture; and sintering of the compressed starting mixture to form the composite.

Weakly-magnetic sintered composite-material and a method for production thereof

Method for manufacturing shaped bodies from hard ferrites

Sinter magnet based on Fe-Nd-B

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Markgroeningen, Germany

Waldemar Draxler