JPS57145034A - Cleavable magnetic iron oxide and its production - Google Patents

Cleavable magnetic iron oxide and its production

Info

Publication number
JPS57145034A
JPS57145034A JP2957981A JP2957981A JPS57145034A JP S57145034 A JPS57145034 A JP S57145034A JP 2957981 A JP2957981 A JP 2957981A JP 2957981 A JP2957981 A JP 2957981A JP S57145034 A JPS57145034 A JP S57145034A
Authority
JP
Japan
Prior art keywords
iron oxide
magnetic iron
production
cleavable
mixed
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
JP2957981A
Other languages
Japanese (ja)
Other versions
JPH024535B2 (en
Inventor
Tadayoshi Karasawa
Katsumi Kono
Katsuji Uchiyama
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.)
Magune Co Ltd
Original Assignee
Magune Co 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 Magune Co Ltd filed Critical Magune Co Ltd
Priority to JP2957981A priority Critical patent/JPS57145034A/en
Publication of JPS57145034A publication Critical patent/JPS57145034A/en
Publication of JPH024535B2 publication Critical patent/JPH024535B2/ja
Granted legal-status Critical Current

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

Abstract

PURPOSE: Nonmagnetic Fe2O3 is mixed with oxides of specific elements, SiO2, Al2O3, further mixed with an oxide of hexagonal crystal and they are heated to produce cleavable magnetic iron oxide of high activity.
CONSTITUTION: To a nonmagnetic powder of Fe2O3, are added 0.02W6% of at least one selected from oxides of Ca, Mg, Ni, Ti, Cd, Mn, Co, Cr, or Be and further 0.1W4% of Al2O3 as well as 0.1W10% of SiO2. They are thoroughly mixed. This mixture is used as a major component and 0.5W20% of hexagonal iron oxide such as BaO.5.2Fe2O3 is added as a seed crystal for crystal formation, then they are heated up to 700W1,450°C. Then, the product is cooled, crushed to produce a cleavable magnetic iron oxide with high activity, which is suitably used to make magnets with good magnetic properties.
COPYRIGHT: (C)1982,JPO&Japio
JP2957981A 1981-03-02 1981-03-02 Cleavable magnetic iron oxide and its production Granted JPS57145034A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2957981A JPS57145034A (en) 1981-03-02 1981-03-02 Cleavable magnetic iron oxide and its production

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2957981A JPS57145034A (en) 1981-03-02 1981-03-02 Cleavable magnetic iron oxide and its production

Publications (2)

Publication Number Publication Date
JPS57145034A true JPS57145034A (en) 1982-09-07
JPH024535B2 JPH024535B2 (en) 1990-01-29

Family

ID=12280006

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2957981A Granted JPS57145034A (en) 1981-03-02 1981-03-02 Cleavable magnetic iron oxide and its production

Country Status (1)

Country Link
JP (1) JPS57145034A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6122605A (en) * 1984-07-10 1986-01-31 Daido Steel Co Ltd Oxide permanent magnet
JPS63186402A (en) * 1987-01-28 1988-08-02 Sumitomo Special Metals Co Ltd Ferrite magnet
JP2008254969A (en) * 2007-04-05 2008-10-23 Kanto Denka Kogyo Co Ltd FLAKE LIKE IRON OXIDE PARTICULATE, FLAKE LIKE Fe BASE METAL PARTICULATE, AND METHOD FOR PRODUCING THEM

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6122605A (en) * 1984-07-10 1986-01-31 Daido Steel Co Ltd Oxide permanent magnet
JPS63186402A (en) * 1987-01-28 1988-08-02 Sumitomo Special Metals Co Ltd Ferrite magnet
JPH0542128B2 (en) * 1987-01-28 1993-06-25 Sumitomo Spec Metals
JP2008254969A (en) * 2007-04-05 2008-10-23 Kanto Denka Kogyo Co Ltd FLAKE LIKE IRON OXIDE PARTICULATE, FLAKE LIKE Fe BASE METAL PARTICULATE, AND METHOD FOR PRODUCING THEM

Also Published As

Publication number Publication date
JPH024535B2 (en) 1990-01-29

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