JPS56145121A - Magnetic powder of metal-containing iron oxide and its preparation - Google Patents
Magnetic powder of metal-containing iron oxide and its preparationInfo
- Publication number
- JPS56145121A JPS56145121A JP3518180A JP3518180A JPS56145121A JP S56145121 A JPS56145121 A JP S56145121A JP 3518180 A JP3518180 A JP 3518180A JP 3518180 A JP3518180 A JP 3518180A JP S56145121 A JPS56145121 A JP S56145121A
- Authority
- JP
- Japan
- Prior art keywords
- iron oxide
- powder
- magnetic
- metal
- magnetic powder
- 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
Abstract
PURPOSE: To prepare magnetic powder of metal-containing iron oxide having improved properties, e.g., coercive force, saturation magnetization, etc., by dispersing magnetic powder of iron oxide into a solution consisting of a specific metal compound dissolved in an organic solvent, followed by heat-treatmenting the dispersion.
CONSTITUTION: An inorganic salt, e.g., halogenide, hydroxide, carbonate, sulfate, etc., organic meal salt, complex, etc. of Co, Ni, Mn, Cr, etc. is dissolved in one, two, or more organic solvents selected from the group consisting of fatty acid, oxycarboxylic acid, fatty acid ester and semidrying oil. Powder of iron oxide, e.g., γ-Fe2O3, Fe3O4, etc. is dispersed in the solution, the dispersion is heated to 150W 300°C and filtered. The prepared powder is washed with ethanol, etc. and dried so that the monomolecular layer of the above-mentioned metal salt is formed on the surface of the particles of iron oxide. Iron oxide as a magnetic recording medium, having improved magnetic properties and a magnetic layer with improved lubricating properties, can be prepared.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3518180A JPS56145121A (en) | 1980-03-20 | 1980-03-20 | Magnetic powder of metal-containing iron oxide and its preparation |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3518180A JPS56145121A (en) | 1980-03-20 | 1980-03-20 | Magnetic powder of metal-containing iron oxide and its preparation |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS56145121A true JPS56145121A (en) | 1981-11-11 |
Family
ID=12434673
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP3518180A Pending JPS56145121A (en) | 1980-03-20 | 1980-03-20 | Magnetic powder of metal-containing iron oxide and its preparation |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS56145121A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS60141611A (en) * | 1983-12-28 | 1985-07-26 | Daikin Ind Ltd | Acicular particle of iron carbide and its preparation |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS538352A (en) * | 1976-07-12 | 1978-01-25 | Hitachi Maxell | Magnetic powder manufacturing |
-
1980
- 1980-03-20 JP JP3518180A patent/JPS56145121A/en active Pending
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS538352A (en) * | 1976-07-12 | 1978-01-25 | Hitachi Maxell | Magnetic powder manufacturing |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS60141611A (en) * | 1983-12-28 | 1985-07-26 | Daikin Ind Ltd | Acicular particle of iron carbide and its preparation |
JPH0121089B2 (en) * | 1983-12-28 | 1989-04-19 | Daikin Kogyo Co Ltd |
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