JPS5616604A - Manufacture of ferromagnetic iron-cobalt alloy powder - Google Patents

Manufacture of ferromagnetic iron-cobalt alloy powder

Info

Publication number
JPS5616604A
JPS5616604A JP9170179A JP9170179A JPS5616604A JP S5616604 A JPS5616604 A JP S5616604A JP 9170179 A JP9170179 A JP 9170179A JP 9170179 A JP9170179 A JP 9170179A JP S5616604 A JPS5616604 A JP S5616604A
Authority
JP
Japan
Prior art keywords
alloy powder
goethite
cobalt alloy
ferromagnetic iron
soln
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.)
Granted
Application number
JP9170179A
Other languages
Japanese (ja)
Other versions
JPS5855203B2 (en
Inventor
Daisuke Shibuta
Motohiko Yoshizumi
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.)
Mitsubishi Metal Corp
Original Assignee
Mitsubishi Metal Corp
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 Mitsubishi Metal Corp filed Critical Mitsubishi Metal Corp
Priority to JP54091701A priority Critical patent/JPS5855203B2/en
Publication of JPS5616604A publication Critical patent/JPS5616604A/en
Publication of JPS5855203B2 publication Critical patent/JPS5855203B2/en
Expired legal-status Critical Current

Links

Landscapes

  • Paints Or Removers (AREA)
  • Manufacture Of Metal Powder And Suspensions Thereof (AREA)
  • Magnetic Record Carriers (AREA)
  • Hard Magnetic Materials (AREA)

Abstract

PURPOSE: To manufacture ferromagnetic iron-cobalt alloy powder, by using a compound material made by sticking fine Co(OH)3 on the surface of needlelike goethite particles prepared from a soln. of ferrous salt.
CONSTITUTION: To a soln. of ferrous salt is added an aqueous alkali soln. in an amount ≥4OH-/Fe2+mol ratio to prepard ferrous hydroxide, which is allowed to contact with a gas contg. oxygen in order to convert the ferrous salt completely into goethite crystals. Subsequently, cobaltous ions in an amount ≤50%Co/(Fe+Co)mol ratio are added to the reaction system, and the system is allowed to contact with oxygen-contg. gas at ≤60°C temp. Hereby, cobaltic hydroxyde sticks to the surface of goethite crystals to form a compound material of goethite and cobaltic salt. The compound material is converted into compound oxide by heating. Ferromagnetic iron-cobalt alloy powder is prepared by reducing the oxide compound with hydrogen.
COPYRIGHT: (C)1981,JPO&Japio
JP54091701A 1979-07-20 1979-07-20 Method for producing iron-cobalt alloy ferromagnetic powder Expired JPS5855203B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP54091701A JPS5855203B2 (en) 1979-07-20 1979-07-20 Method for producing iron-cobalt alloy ferromagnetic powder

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP54091701A JPS5855203B2 (en) 1979-07-20 1979-07-20 Method for producing iron-cobalt alloy ferromagnetic powder

Publications (2)

Publication Number Publication Date
JPS5616604A true JPS5616604A (en) 1981-02-17
JPS5855203B2 JPS5855203B2 (en) 1983-12-08

Family

ID=14033815

Family Applications (1)

Application Number Title Priority Date Filing Date
JP54091701A Expired JPS5855203B2 (en) 1979-07-20 1979-07-20 Method for producing iron-cobalt alloy ferromagnetic powder

Country Status (1)

Country Link
JP (1) JPS5855203B2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5832233A (en) * 1981-08-21 1983-02-25 Hitachi Ltd Magnetic recording medium
US5735969A (en) * 1996-03-07 1998-04-07 Imation Corp. Method of producing acicular magnetic alloy particles

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5832233A (en) * 1981-08-21 1983-02-25 Hitachi Ltd Magnetic recording medium
JPH0253850B2 (en) * 1981-08-21 1990-11-20 Hitachi Ltd
US5735969A (en) * 1996-03-07 1998-04-07 Imation Corp. Method of producing acicular magnetic alloy particles

Also Published As

Publication number Publication date
JPS5855203B2 (en) 1983-12-08

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