JPS5678430A - Production of iron compound particle for magnetic recording - Google Patents
Production of iron compound particle for magnetic recordingInfo
- Publication number
- JPS5678430A JPS5678430A JP15359579A JP15359579A JPS5678430A JP S5678430 A JPS5678430 A JP S5678430A JP 15359579 A JP15359579 A JP 15359579A JP 15359579 A JP15359579 A JP 15359579A JP S5678430 A JPS5678430 A JP S5678430A
- Authority
- JP
- Japan
- Prior art keywords
- particles
- iron
- aqueous solution
- powder
- 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.)
- Granted
Links
Landscapes
- Compounds Of Iron (AREA)
- Magnetic Ceramics (AREA)
- Hard Magnetic Materials (AREA)
Abstract
PURPOSE: When particles of iron oxyhydtroxide is precipitated from an aqueous solution of iron ion, a specific amount of a compound of an element in the group II of the periodic table is coprecipitated, thus producing fine and strong magnetic particles of iron compound that is free from particle destruction.
CONSTITUTION: A fine powder of a group II element or its inorganic salt is added, in the form of aqueous solution, to an aqueous solution of ferrous or ferric salt at an atomic weight ratio of 0.001/100W10/100. An alkali aqueous solution is poured to the resulting solution to form an inert substance, which is oxidized by air to form fine needles of iron oxyhydroxide. These particles are washed with water, filtered, dried and pulverized or granulated. The resultant particles are reduced under heating to form a powder of Fe3O4 particles. Subsequently, the particles is subjected to catalytic oxidation to give a γ-Fe2O3 particle powder. This process can keep the shape of fine needles of iron oxyhydroxide and gives iron compound particles fo r magnetic recording with freeness from particle destruction and good magnetic characteristics.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15359579A JPS5678430A (en) | 1979-11-29 | 1979-11-29 | Production of iron compound particle for magnetic recording |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15359579A JPS5678430A (en) | 1979-11-29 | 1979-11-29 | Production of iron compound particle for magnetic recording |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5678430A true JPS5678430A (en) | 1981-06-27 |
JPS6353133B2 JPS6353133B2 (en) | 1988-10-21 |
Family
ID=15565917
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP15359579A Granted JPS5678430A (en) | 1979-11-29 | 1979-11-29 | Production of iron compound particle for magnetic recording |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5678430A (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS56109827A (en) * | 1980-02-05 | 1981-08-31 | Mitsui Toatsu Chem Inc | Manufacture of iron compound particle for magnetic recording medium |
JPS6158215A (en) * | 1984-08-29 | 1986-03-25 | Hitachi Maxell Ltd | Manufacture of magnetic iron oxide powder |
JPH0766026A (en) * | 1993-08-31 | 1995-03-10 | Fuji Elelctrochem Co Ltd | Oxide magnetic material and manufacture thereof |
JPH0766028A (en) * | 1993-08-31 | 1995-03-10 | Fuji Elelctrochem Co Ltd | Oxide magnetic material and manufacture thereof |
CN104971752B (en) * | 2014-04-03 | 2017-10-13 | 南京工大环境科技有限公司 | Magnetic catalyst suitable for catalytic oxidation technique and its preparation method and application |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4867198A (en) * | 1971-12-17 | 1973-09-13 | ||
JPS55125205A (en) * | 1979-03-10 | 1980-09-26 | Bayer Ag | Ferromagnetic metal pigment comprising essentially iron and method |
JPS55149136A (en) * | 1979-05-11 | 1980-11-20 | Tdk Corp | Manufacture of iron oxide hydrate |
-
1979
- 1979-11-29 JP JP15359579A patent/JPS5678430A/en active Granted
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4867198A (en) * | 1971-12-17 | 1973-09-13 | ||
JPS55125205A (en) * | 1979-03-10 | 1980-09-26 | Bayer Ag | Ferromagnetic metal pigment comprising essentially iron and method |
JPS55149136A (en) * | 1979-05-11 | 1980-11-20 | Tdk Corp | Manufacture of iron oxide hydrate |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS56109827A (en) * | 1980-02-05 | 1981-08-31 | Mitsui Toatsu Chem Inc | Manufacture of iron compound particle for magnetic recording medium |
JPH0122204B2 (en) * | 1980-02-05 | 1989-04-25 | Mitsui Toatsu Chemicals | |
JPS6158215A (en) * | 1984-08-29 | 1986-03-25 | Hitachi Maxell Ltd | Manufacture of magnetic iron oxide powder |
JPH0766026A (en) * | 1993-08-31 | 1995-03-10 | Fuji Elelctrochem Co Ltd | Oxide magnetic material and manufacture thereof |
JPH0766028A (en) * | 1993-08-31 | 1995-03-10 | Fuji Elelctrochem Co Ltd | Oxide magnetic material and manufacture thereof |
CN104971752B (en) * | 2014-04-03 | 2017-10-13 | 南京工大环境科技有限公司 | Magnetic catalyst suitable for catalytic oxidation technique and its preparation method and application |
Also Published As
Publication number | Publication date |
---|---|
JPS6353133B2 (en) | 1988-10-21 |
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