JPS5796504A - Manufacture of ferromagnetic iron compound particle for magnetic recording medium - Google Patents

Manufacture of ferromagnetic iron compound particle for magnetic recording medium

Info

Publication number
JPS5796504A
JPS5796504A JP55172597A JP17259780A JPS5796504A JP S5796504 A JPS5796504 A JP S5796504A JP 55172597 A JP55172597 A JP 55172597A JP 17259780 A JP17259780 A JP 17259780A JP S5796504 A JPS5796504 A JP S5796504A
Authority
JP
Japan
Prior art keywords
aqueous solution
thereafter
ferrous salt
alkali
fine
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
JP55172597A
Other languages
Japanese (ja)
Inventor
Kazufumi Oshima
Mitsuo Matsunaga
Haruo Sekiguchi
Toshinori Ishibashi
Takahiro Horimoto
Yasuharu Sakurai
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.)
Mitsui Toatsu Chemicals Inc
Original Assignee
Mitsui Toatsu Chemicals Inc
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 Mitsui Toatsu Chemicals Inc filed Critical Mitsui Toatsu Chemicals Inc
Priority to JP55172597A priority Critical patent/JPS5796504A/en
Publication of JPS5796504A publication Critical patent/JPS5796504A/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)
  • Paints Or Removers (AREA)
  • Manufacture Of Metal Powder And Suspensions Thereof (AREA)
  • Magnetic Record Carriers (AREA)
  • Hard Magnetic Materials (AREA)

Abstract

PURPOSE:To improve heat resisting characteristics and high frequency region characteristics by adding aqueous solution of a compound including Si into aqueous solution of ferrous salt and the like, transforming the Si component into gel- formed, fine, insoluble material, adding alkali agent, and thereafter passing gas including oxygen. CONSTITUTION:The aqueous solution of the compound including Si such as silica gel and water glass is put into the concentrated aqueous solution of ferrous salt or mixture of ferrous salt and ferric salt of e.g. pH 5 or less. The atomic weight ratio of Si with respect to Fe lies within the range of 0.005/100-5/100. A fine, white insoluble sediment material is formed. Then it is diluted with pure water. Thereafter it is neutralized by the aqueous solution of the alkali agent such as alkali hydroxide and alkali carbonate. Then, needle shaped particles of iron oxihydroxide is obtained by passing oxidized gas and the like such as air. Thereafter the particles are washed, filtered, dried or temporarily burned, and contacted with reducing gas under heating. Thus the heat resisting characteristics and the recording characteristics in the high frequency region can be improved to the large extent.
JP55172597A 1980-12-09 1980-12-09 Manufacture of ferromagnetic iron compound particle for magnetic recording medium Pending JPS5796504A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55172597A JPS5796504A (en) 1980-12-09 1980-12-09 Manufacture of ferromagnetic iron compound particle for magnetic recording medium

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55172597A JPS5796504A (en) 1980-12-09 1980-12-09 Manufacture of ferromagnetic iron compound particle for magnetic recording medium

Publications (1)

Publication Number Publication Date
JPS5796504A true JPS5796504A (en) 1982-06-15

Family

ID=15944794

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55172597A Pending JPS5796504A (en) 1980-12-09 1980-12-09 Manufacture of ferromagnetic iron compound particle for magnetic recording medium

Country Status (1)

Country Link
JP (1) JPS5796504A (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5620105A (en) * 1979-07-26 1981-02-25 Toda Kogyo Corp Production of acicular crystal metal iron magnetic particle powder
JPS56166312A (en) * 1980-05-27 1981-12-21 Hitachi Maxell Ltd Manufacture of metallic magnetic powder

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5620105A (en) * 1979-07-26 1981-02-25 Toda Kogyo Corp Production of acicular crystal metal iron magnetic particle powder
JPS56166312A (en) * 1980-05-27 1981-12-21 Hitachi Maxell Ltd Manufacture of metallic magnetic powder

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