JPS56104720A - Preparation of particle of iron compound for magnetic recording - Google Patents
Preparation of particle of iron compound for magnetic recordingInfo
- 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
Links
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
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) |
-
1980
- 1980-01-22 JP JP525980A patent/JPS56104720A/en active Pending
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