JPS56160329A - Manufacture of magnetic iron oxide powder - Google Patents
Manufacture of magnetic iron oxide powderInfo
- Publication number
- JPS56160329A JPS56160329A JP6023780A JP6023780A JPS56160329A JP S56160329 A JPS56160329 A JP S56160329A JP 6023780 A JP6023780 A JP 6023780A JP 6023780 A JP6023780 A JP 6023780A JP S56160329 A JPS56160329 A JP S56160329A
- Authority
- JP
- Japan
- Prior art keywords
- powder
- contg
- hydroxide
- nickel
- nickelous
- 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)
- Inorganic Compounds Of Heavy Metals (AREA)
- Hard Magnetic Materials (AREA)
Abstract
PURPOSE: To obtain the titled powder having superior magnetic characteristics and suitable for use as a material for the recording element of a magnetic recording medium by heat reducing powder of nickel-contg. α-iron oxyhydroxide obtd. from ferrous hydroxide and nickelous hydroxide.
CONSTITUTION: A mixed soln. of ferrous salt and nickelous salt is mixed with an alkali soln. to coprecipitate ferrous hydroxide and nickelous hydroxide, or ferrous hydroxide and nickelous hydroxide are precipitated separately and mixed. The precipitate is treated with an oxygen-contg. gas to obtain hardly branched needlike powder of nickel-contg. α-iron oxyhydroxide having relatively small particle size and uniform particle size distribution. The powder is then heat-reduced or further oxidized to obtain nickel-contg. magnetic magnetite powder or nickel-contg. magnetic maghemite powder having hardly branched fine particle shape.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP6023780A JPS56160329A (en) | 1980-05-06 | 1980-05-06 | Manufacture of magnetic iron oxide powder |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP6023780A JPS56160329A (en) | 1980-05-06 | 1980-05-06 | Manufacture of magnetic iron oxide powder |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS56160329A true JPS56160329A (en) | 1981-12-10 |
JPS6320769B2 JPS6320769B2 (en) | 1988-04-30 |
Family
ID=13136356
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP6023780A Granted JPS56160329A (en) | 1980-05-06 | 1980-05-06 | Manufacture of magnetic iron oxide powder |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS56160329A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS62223022A (en) * | 1986-03-22 | 1987-10-01 | Toda Kogyo Corp | Production of acicular crystal of goethite particle powder |
CN100427176C (en) * | 2006-10-12 | 2008-10-22 | 杨裕能 | Anti fire oxygen filter |
-
1980
- 1980-05-06 JP JP6023780A patent/JPS56160329A/en active Granted
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS62223022A (en) * | 1986-03-22 | 1987-10-01 | Toda Kogyo Corp | Production of acicular crystal of goethite particle powder |
CN100427176C (en) * | 2006-10-12 | 2008-10-22 | 杨裕能 | Anti fire oxygen filter |
Also Published As
Publication number | Publication date |
---|---|
JPS6320769B2 (en) | 1988-04-30 |
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