Title:
軟磁性粉末複合材料、その製造方法及びその使用
Document Type and Number:
Japanese Patent JP2005536036
Kind Code:
A
Abstract:
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.
Inventors:
Adnan Okumus
Valdemar Draxler
Valdemar Draxler
Application Number:
JP2004512146A
Publication Date:
November 24, 2005
Filing Date:
January 27, 2003
Export Citation:
Assignee:
ROBERT BOSCH GMBH
International Classes:
H01F1/24; H01F1/33; H01F1/34; H01F1/37; H01F41/02; (IPC1-7): H01F1/24; H01F1/34; H01F1/37
Attorney, Agent or Firm:
Toshio Yano
Einzel Felix-Reinhard
Reinhard Einsel
Einzel Felix-Reinhard
Reinhard Einsel