JPS56165302A - Manufacture of magnetic metal powder - Google Patents

Manufacture of magnetic metal powder

Info

Publication number
JPS56165302A
JPS56165302A JP6917280A JP6917280A JPS56165302A JP S56165302 A JPS56165302 A JP S56165302A JP 6917280 A JP6917280 A JP 6917280A JP 6917280 A JP6917280 A JP 6917280A JP S56165302 A JPS56165302 A JP S56165302A
Authority
JP
Japan
Prior art keywords
powder
hydroxide
magnetic
magnetic powder
iron
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP6917280A
Other languages
Japanese (ja)
Inventor
Shigeo Hirai
Toshinobu Sueyoshi
Masahiro Amamiya
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Maxell Ltd
Original Assignee
Hitachi Maxell Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hitachi Maxell Ltd filed Critical Hitachi Maxell Ltd
Priority to JP6917280A priority Critical patent/JPS56165302A/en
Publication of JPS56165302A publication Critical patent/JPS56165302A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F1/00—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
    • H01F1/01—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
    • H01F1/03—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity
    • H01F1/032—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials
    • H01F1/04—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials metals or alloys
    • H01F1/06—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials metals or alloys in the form of particles, e.g. powder
    • H01F1/065—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials metals or alloys in the form of particles, e.g. powder obtained by a reduction

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Compounds Of Iron (AREA)
  • Manufacture Of Metal Powder And Suspensions Thereof (AREA)
  • Hard Magnetic Materials (AREA)

Abstract

PURPOSE:To enable to regulate the grain size of the magnetic powder being mainly composed of metallic iron, and to prevent sintering and deformation in shape of the particle in the heat-treatment process of the magnetic metal powder by a method wherein the quantity of hydroxide of alkaline earth metal exsisting in the suspension of ferrous hydroxide is made to be increased or decreased. CONSTITUTION:A gas containing oxygen like air, etc., is made to be blown into an alkaline suspension of ferrous hydroxide containing alkaline erath metal of Mg, Ca, etc., and being pH thereof 11 or more to make alpha-hydroxy iron hydroxide to grow. Thus obtained alpha-oxyhydroxide, or iron oxide obtained by heating thereof to dehydrate is heated in a vapor phase to be reduced to make the powder being mainly composed of metallic iron. Accordingly, the grain size of the magnetic powder can be regulated, besides sintering and deformation of shape of the particle to be generated in heat-treatment process like heating or reduction, etc., can be prevented, and the magnetic powder being precise and having superior magnetic characteristic can be obtained.
JP6917280A 1980-05-23 1980-05-23 Manufacture of magnetic metal powder Pending JPS56165302A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6917280A JPS56165302A (en) 1980-05-23 1980-05-23 Manufacture of magnetic metal powder

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6917280A JPS56165302A (en) 1980-05-23 1980-05-23 Manufacture of magnetic metal powder

Publications (1)

Publication Number Publication Date
JPS56165302A true JPS56165302A (en) 1981-12-18

Family

ID=13395027

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6917280A Pending JPS56165302A (en) 1980-05-23 1980-05-23 Manufacture of magnetic metal powder

Country Status (1)

Country Link
JP (1) JPS56165302A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5732305A (en) * 1980-07-31 1982-02-22 Toda Kogyo Corp Production of needle crystal fe-mg alloy magnetic particle powder
JPS61186224A (en) * 1985-02-12 1986-08-19 Toyo Soda Mfg Co Ltd Acicular goethite and production thereof
JPH0730852U (en) * 1993-11-30 1995-06-13 株式会社カンサイプランニング Hanger

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5732305A (en) * 1980-07-31 1982-02-22 Toda Kogyo Corp Production of needle crystal fe-mg alloy magnetic particle powder
JPS61186224A (en) * 1985-02-12 1986-08-19 Toyo Soda Mfg Co Ltd Acicular goethite and production thereof
JPH0730852U (en) * 1993-11-30 1995-06-13 株式会社カンサイプランニング Hanger

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