JPS55111105A - Raw magnetic material - Google Patents
Raw magnetic materialInfo
- Publication number
- JPS55111105A JPS55111105A JP1789479A JP1789479A JPS55111105A JP S55111105 A JPS55111105 A JP S55111105A JP 1789479 A JP1789479 A JP 1789479A JP 1789479 A JP1789479 A JP 1789479A JP S55111105 A JPS55111105 A JP S55111105A
- Authority
- JP
- Japan
- Prior art keywords
- phosphorus
- organic
- acid
- acid ester
- magnetic material
- 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 maintain high coercive force for a long time by applying the reforming technique for nonorganic material to iron powder.
CONSTITUTION: A raw magnetic material is obtained by contacting iron powder to one or more kinds of materials selected from mono-organic-phosphorus-acid ester, bis-organic-phosphorus-acid ester, and salt thereof. The constitution formulae of the- organic-phosphorus-acid ester, which can be used in this method is, for example, shown by the formulae. The organic-phosphorus-acid ester has a form wherein one or two of three acid radicals of phosphorus acid are esterificated. The remaining acid radicals exist as a form of free acid radical or as a form of salt neutralized by alkali.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1789479A JPS55111105A (en) | 1979-02-20 | 1979-02-20 | Raw magnetic material |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1789479A JPS55111105A (en) | 1979-02-20 | 1979-02-20 | Raw magnetic material |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS55111105A true JPS55111105A (en) | 1980-08-27 |
JPS6111446B2 JPS6111446B2 (en) | 1986-04-03 |
Family
ID=11956420
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP1789479A Granted JPS55111105A (en) | 1979-02-20 | 1979-02-20 | Raw magnetic material |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS55111105A (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5823324A (en) * | 1981-07-31 | 1983-02-12 | Tdk Corp | High density magnetic recording medium |
US4420537A (en) * | 1979-11-28 | 1983-12-13 | Tdk Electronics Co. Ltd. | Magnetic recording medium having cobalt adsorbed iron oxide layer |
JPS60242467A (en) * | 1984-05-17 | 1985-12-02 | Konishiroku Photo Ind Co Ltd | Treatment of magnetic powder |
JPH02260608A (en) * | 1989-03-31 | 1990-10-23 | Hitachi Maxell Ltd | Fine partice of ferromagnetic metallic iron, manufacture thereof, and magnetic recording medium using same |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2602883B2 (en) * | 1988-03-11 | 1997-04-23 | 株式会社メイト | Surface treatment method for metal fine powder |
JPH02144888U (en) * | 1989-05-12 | 1990-12-07 |
-
1979
- 1979-02-20 JP JP1789479A patent/JPS55111105A/en active Granted
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4420537A (en) * | 1979-11-28 | 1983-12-13 | Tdk Electronics Co. Ltd. | Magnetic recording medium having cobalt adsorbed iron oxide layer |
JPS5823324A (en) * | 1981-07-31 | 1983-02-12 | Tdk Corp | High density magnetic recording medium |
JPS60242467A (en) * | 1984-05-17 | 1985-12-02 | Konishiroku Photo Ind Co Ltd | Treatment of magnetic powder |
JPH0340923B2 (en) * | 1984-05-17 | 1991-06-20 | ||
JPH02260608A (en) * | 1989-03-31 | 1990-10-23 | Hitachi Maxell Ltd | Fine partice of ferromagnetic metallic iron, manufacture thereof, and magnetic recording medium using same |
Also Published As
Publication number | Publication date |
---|---|
JPS6111446B2 (en) | 1986-04-03 |
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