JPS56104720A - Preparation of particle of iron compound for magnetic recording - Google Patents

Preparation of particle of iron compound for magnetic recording

Info

Publication number
JPS56104720A
JPS56104720A JP525980A JP525980A JPS56104720A JP S56104720 A JPS56104720 A JP S56104720A JP 525980 A JP525980 A JP 525980A JP 525980 A JP525980 A JP 525980A JP S56104720 A JPS56104720 A JP S56104720A
Authority
JP
Japan
Prior art keywords
particle
fine
magnetic recording
acicular
iron compound
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
JP525980A
Other languages
Japanese (ja)
Inventor
Kazufumi Oshima
Mitsuo Matsunaga
Haruo Sekiguchi
Kazuhiro Imaoka
Yuji Namiki
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 JP525980A priority Critical patent/JPS56104720A/en
Publication of JPS56104720A publication Critical patent/JPS56104720A/en
Pending legal-status Critical Current

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Landscapes

  • Hard Magnetic Materials (AREA)
  • Compounds Of Iron (AREA)
  • Magnetic Ceramics (AREA)

Abstract

PURPOSE: To prepare fine powder of ferromagnetic iron oxide resistant to damage of the particle form, breakage, and sintering, and useful as a magnetic recording medium, by adding a specific weight ratio of Mn to fine acicular particle of iron oxyhydroxide, and reducing and oxidizing the particle.
CONSTITUTION: Mn is added to the fine acicular particle of iron oxyhydroxide as a secondary component. The atomic weight ratio of Mn to Fe is 0.005W10 to 100. The Mn-doped acicular fine particle of iron oxyhydroxide is reduced and/or oxidized to obtain fine powder of a ferromagnetic iron compound such as Fe3O4, γ-Fe2O3, α-Fe, etc. having excellent particle shape retainability and magnetic characteristics.
COPYRIGHT: (C)1981,JPO&Japio
JP525980A 1980-01-22 1980-01-22 Preparation of particle of iron compound for magnetic recording Pending JPS56104720A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP525980A JPS56104720A (en) 1980-01-22 1980-01-22 Preparation of particle of iron compound for magnetic recording

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP525980A JPS56104720A (en) 1980-01-22 1980-01-22 Preparation of particle of iron compound for magnetic recording

Publications (1)

Publication Number Publication Date
JPS56104720A true JPS56104720A (en) 1981-08-20

Family

ID=11606223

Family Applications (1)

Application Number Title Priority Date Filing Date
JP525980A Pending JPS56104720A (en) 1980-01-22 1980-01-22 Preparation of particle of iron compound for magnetic recording

Country Status (1)

Country Link
JP (1) JPS56104720A (en)

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