JPS5684404A - Manufacture of magnetic alloy powder composed primarily of iron or metallic iron magnetic powder - Google Patents
Manufacture of magnetic alloy powder composed primarily of iron or metallic iron magnetic powderInfo
- Publication number
- JPS5684404A JPS5684404A JP16095479A JP16095479A JPS5684404A JP S5684404 A JPS5684404 A JP S5684404A JP 16095479 A JP16095479 A JP 16095479A JP 16095479 A JP16095479 A JP 16095479A JP S5684404 A JPS5684404 A JP S5684404A
- Authority
- JP
- Japan
- Prior art keywords
- iron
- iron oxide
- magnetic
- oxide particles
- manufacture
- 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
Abstract
PURPOSE: To obtain magnetic alloy powders for magnetic recording materials by a method in which iron oxide particles containing metals other than iron or needlelike iron oxide are covered with a phenolic resin and a higher fatty acid and then reduced by heating under a specific temparature and reductive condition.
CONSTITUTION: Iron oxide particles containing metals other than iron or needlelike iron oxide are dispersed in water and then 0.5W5wt%, particularly 1W4wt% (based on iron oxide) a 95.5:5W5:95 mixture of a phenolic resin and a higher fatty acid is dissolved in the water and its pH is regulated to 8 or more. Then, the pH of the water is further regulated to crystallize out the phenolic resin and higher fatty acid on the surfaces of the iron oxide particles. The iron oxide particles so treated are dried and then reduced by heating under a reductive condition to meet R value 0<R≤0.1 (particularly 0.02≤R<0.07) represented by the specific formula.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP54160954A JPS5946282B2 (en) | 1979-12-11 | 1979-12-11 | Method for manufacturing metallic iron or alloy magnetic particle powder mainly composed of iron |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP54160954A JPS5946282B2 (en) | 1979-12-11 | 1979-12-11 | Method for manufacturing metallic iron or alloy magnetic particle powder mainly composed of iron |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5684404A true JPS5684404A (en) | 1981-07-09 |
| JPS5946282B2 JPS5946282B2 (en) | 1984-11-12 |
Family
ID=15725779
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP54160954A Expired JPS5946282B2 (en) | 1979-12-11 | 1979-12-11 | Method for manufacturing metallic iron or alloy magnetic particle powder mainly composed of iron |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5946282B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5944809A (en) * | 1982-07-31 | 1984-03-13 | バスフ アクチエンゲゼルシヤフト | Method of producing substantially acicular ferromagnetic metal particles |
| JPH02253904A (en) * | 1989-03-28 | 1990-10-12 | Sumitomo Rubber Ind Ltd | Tread mold for reclaimed tire |
-
1979
- 1979-12-11 JP JP54160954A patent/JPS5946282B2/en not_active Expired
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5944809A (en) * | 1982-07-31 | 1984-03-13 | バスフ アクチエンゲゼルシヤフト | Method of producing substantially acicular ferromagnetic metal particles |
| JPH0475641B2 (en) * | 1982-07-31 | 1992-12-01 | Basf Ag | |
| JPH02253904A (en) * | 1989-03-28 | 1990-10-12 | Sumitomo Rubber Ind Ltd | Tread mold for reclaimed tire |
| JPH064249B2 (en) * | 1989-03-28 | 1994-01-19 | 住友ゴム工業株式会社 | Tread mold for retreaded tires |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5946282B2 (en) | 1984-11-12 |
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