JPS56155022A - Preparation of magnetic powder - Google Patents
Preparation of magnetic powderInfo
- Publication number
- JPS56155022A JPS56155022A JP5348180A JP5348180A JPS56155022A JP S56155022 A JPS56155022 A JP S56155022A JP 5348180 A JP5348180 A JP 5348180A JP 5348180 A JP5348180 A JP 5348180A JP S56155022 A JPS56155022 A JP S56155022A
- Authority
- JP
- Japan
- Prior art keywords
- heat treatment
- point
- prepared
- components
- 100mol
- 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
- 239000006247 magnetic powder Substances 0.000 title abstract 2
- 239000000463 material Substances 0.000 abstract 4
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 abstract 3
- 238000010438 heat treatment Methods 0.000 abstract 3
- 239000011521 glass Substances 0.000 abstract 2
- 239000002245 particle Substances 0.000 abstract 2
- 239000000126 substance Substances 0.000 abstract 2
- 229910000859 α-Fe Inorganic materials 0.000 abstract 2
- 239000007864 aqueous solution Substances 0.000 abstract 1
- MVYYDFCVPLFOKV-UHFFFAOYSA-M barium monohydroxide Chemical compound [Ba]O MVYYDFCVPLFOKV-UHFFFAOYSA-M 0.000 abstract 1
- 238000010586 diagram Methods 0.000 abstract 1
- 238000007496 glass forming Methods 0.000 abstract 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 abstract 1
- 238000002844 melting Methods 0.000 abstract 1
- 230000008018 melting Effects 0.000 abstract 1
- 238000002156 mixing Methods 0.000 abstract 1
- 239000000203 mixture Substances 0.000 abstract 1
- 238000010791 quenching Methods 0.000 abstract 1
- 230000000171 quenching effect Effects 0.000 abstract 1
Landscapes
- Compounds Of Iron (AREA)
- Hard Magnetic Materials (AREA)
Abstract
PURPOSE: To prepare easily magnetic powder useful for high-density vertical magnetic recording, etc., by specifying a molar ratio of the individual components of glass-forming substances of three-component system, blending the substances with a replacing component, melting them, quenching the prepared glass material, followed by two-stage heat treatment.
CONSTITUTION: In a triangular diagram of MO-Fe2O3-B2O3 (M is Ba, Sr, Pb, or Ca), a ratio of three components is selected in a range made by drawing lines between point of 50mol% MO and 50mol% B2O3, point of 100mol% Fe2O3, and point of 100mol% MO. To control the reduction of coercive force, a given amount of a replacing component, e.g., Co, Ti, etc. is added to the components. The prepared blend is melted and quenched to form a glass material. The material is subjected to primary heat treatment at 450W650°C for ≥1hr, and subjected to second heat treatment at ≥750°C continuously, to precipitate Ba-ferrite particles. The prepared material is treated with an aqueous solution of acetic acid, and BaO.B2O3 phase and BaOH phase are dissolved and removed, to give magnetoplumbite type Ba-ferrite particles.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5348180A JPS56155022A (en) | 1980-04-24 | 1980-04-24 | Preparation of magnetic powder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5348180A JPS56155022A (en) | 1980-04-24 | 1980-04-24 | Preparation of magnetic powder |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS56155022A true JPS56155022A (en) | 1981-12-01 |
| JPS6127329B2 JPS6127329B2 (en) | 1986-06-25 |
Family
ID=12944028
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5348180A Granted JPS56155022A (en) | 1980-04-24 | 1980-04-24 | Preparation of magnetic powder |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS56155022A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58169902A (en) * | 1982-03-31 | 1983-10-06 | Toshiba Corp | Preparation of magnetic powder for magnetic recording |
| JPH01194403A (en) * | 1988-01-29 | 1989-08-04 | Toshiba Glass Co Ltd | Substitution type hexagonal crystal ferrite magnetic powder |
| US5358660A (en) * | 1988-01-14 | 1994-10-25 | Showa Denko Kabushiki Kaisha | Magnetic particles for perpendicular magnetic recording |
-
1980
- 1980-04-24 JP JP5348180A patent/JPS56155022A/en active Granted
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58169902A (en) * | 1982-03-31 | 1983-10-06 | Toshiba Corp | Preparation of magnetic powder for magnetic recording |
| US5358660A (en) * | 1988-01-14 | 1994-10-25 | Showa Denko Kabushiki Kaisha | Magnetic particles for perpendicular magnetic recording |
| JPH01194403A (en) * | 1988-01-29 | 1989-08-04 | Toshiba Glass Co Ltd | Substitution type hexagonal crystal ferrite magnetic powder |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6127329B2 (en) | 1986-06-25 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPS5667904A (en) | Preparation method of megnetic powder for high density magnetic recording | |
| EP0183988B1 (en) | Magnetic powders for magnetic recording media and magnetic recording media employing said magnetic powder therein | |
| US4569775A (en) | Method for manufacturing a magnetic powder for high density magnetic recording | |
| JPS56160328A (en) | Manufacture of ba-ferrite powder | |
| ATE138049T1 (en) | OXIDE POWDER, SINTERED BODY, METHOD FOR THE PRODUCTION THEREOF AND TARGET COMPOSED THEREOF | |
| JPS56155022A (en) | Preparation of magnetic powder | |
| JPS5727788A (en) | Information recording member | |
| JPS5660001A (en) | Magnetic recording medium | |
| EP0136599A2 (en) | Barium ferrite magnetic powder and recording medium employing the same | |
| KR870007539A (en) | Plate-shaped barium ferrite particles for magnetic recording and manufacturing method thereof | |
| JPS5661101A (en) | Magnetic recording medium | |
| DE3417793A1 (en) | METHOD FOR THE PRODUCTION OF FINE-PARTIC, NEEDLE-SHAPED AND HIGH-CERCITIVE HEXAGONAL FERRITES AND THEIR USE FOR THE PRODUCTION OF MAGNETIC RECORDING CARRIERS AND PLASTOFERRITE | |
| ES8707013A1 (en) | Titanium-containing and cobalt-containing manganese-zinc ferrite core and method of manufacturing same. | |
| JPS56134522A (en) | Preparation of magnetic powder for magnetic recording use | |
| GB862821A (en) | Improvements in or relating to methods of manufacturing bodies of ferromagnetic materials | |
| CA2082689A1 (en) | Zinc oxide crystal and method of producing same | |
| JPS5660002A (en) | Manufacture of high density recording magnetic powder | |
| GB1433805A (en) | Methods of electrolysis using complex iron oxide electrodes | |
| DE3570639D1 (en) | Method for the preparation of fine hexagonal ferrite powders, in particular, for magnetic recording | |
| CA2141857A1 (en) | Magnetic Oxide and Process for Producing Same | |
| JPS57145034A (en) | Cleavable magnetic iron oxide and its production | |
| JPS5690505A (en) | Manufacture of magnetic powder for high density magnetic recording | |
| JPS5756326A (en) | Manufacture of magnetic powder for magnetic recording medium | |
| DE19822783A1 (en) | Single crystal manganese-zinc ferrite material | |
| DE3306683A1 (en) | Machinable, magnetic glass ceramics material |