Soft magnetic powder composite material, method for the production thereof and use of the same

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 val...

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Bibliographic Details
Main Author OKUMUS ADNAN,RAXLER WALDEMAR
Format Patent
LanguageEnglish
Published 08.08.2007
Subjects
ACTUATING-FLOATS
BASIC ELECTRIC ELEMENTS
BLASTING
COCKS
DEVICES FOR VENTING OR AERATING
ELECTRICITY
ENGINEERING ELEMENTS AND UNITS
GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS
HEATING
INDUCTANCES
LIGHTING
MAGNETS
MECHANICAL ENGINEERING
SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
TAPS
THERMAL INSULATION IN GENERAL
TRANSFORMERS
VALVES
WEAPONS
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Summary: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: a) preparation of a starting mixture including a pure iron powder, a phosphatized iron powder, or an iron alloy powder and a soft ferrite powder, b) mixing of the starting mixture, c) compacting of the starting mixture in a press under increased pressure, d) debinding of the compacted starting mixture in an inert gas atmosphere or in an oxygen-containing gas atmosphere, and e) heat treatment of the compacted starting mixture in an oxidizing gas atmosphere at a temperature of 410° C. to 500° C.
Bibliography:Application Number: CN20038011970