JPS54106895A - Ferromagnetic powder - Google Patents
Ferromagnetic powderInfo
- Publication number
- JPS54106895A JPS54106895A JP1330178A JP1330178A JPS54106895A JP S54106895 A JPS54106895 A JP S54106895A JP 1330178 A JP1330178 A JP 1330178A JP 1330178 A JP1330178 A JP 1330178A JP S54106895 A JPS54106895 A JP S54106895A
- Authority
- JP
- Japan
- Prior art keywords
- ion
- cobalt ion
- ferromagnetic
- powder
- iron
- 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
- Compounds Of Iron (AREA)
- Hard Magnetic Materials (AREA)
Abstract
PURPOSE: To obtain magnetically stable ferromagnetic powder with a high coercive force by subjecting a ferromagnetic iron oxide powder coated with a compound of cobalt ion or cobalt ion and iron ion to a heat treatment.
CONSTITUTION: A suspension containing a ferromagnetic powder which serves as dispersed nucleous crystals and cobalt ion or cobalt ion and iron ion is regulated its alkali concentration to 0.5 to 2 N by the addition of an alkali and then subjected to a heat reaction to obtain the ferromagnetic iron oxide powder coated with a compound of cobalt ion or cobalt ion and iron ion. Then, the powder is washed with water, dried, and then heat treated at 120 to 250°C in a non-oxidative atmosphere to obtain the ferromagnetic powder for magnetic recording.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1330178A JPS54106895A (en) | 1978-02-08 | 1978-02-08 | Ferromagnetic powder |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1330178A JPS54106895A (en) | 1978-02-08 | 1978-02-08 | Ferromagnetic powder |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS54106895A true JPS54106895A (en) | 1979-08-22 |
Family
ID=11829352
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP1330178A Pending JPS54106895A (en) | 1978-02-08 | 1978-02-08 | Ferromagnetic powder |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS54106895A (en) |
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5860630A (en) * | 1981-10-07 | 1983-04-11 | Ishihara Sangyo Kaisha Ltd | Preparation of cobalt-containing ferromagnetic iron oxide |
US4414245A (en) * | 1981-07-28 | 1983-11-08 | Ishihara Sangyo Kaisha, Ltd. | Process for producing cobalt containing ferromagnetic iron oxides |
JPS59500739A (en) * | 1983-04-12 | 1984-04-26 | メモレックス・コーポレーション | ferromagnetic recording material |
JPS59138312A (en) * | 1983-01-28 | 1984-08-08 | Ishihara Sangyo Kaisha Ltd | Manufacture of magnetic ferrous oxide powder containing cobalt |
JPS59159502A (en) * | 1983-03-02 | 1984-09-10 | Ishihara Sangyo Kaisha Ltd | Manufacture of cobalt-containing magnetic oxidized iron powder |
US4551327A (en) * | 1982-07-16 | 1985-11-05 | Ishihara Sangyo Kaishi, Limited | Process for producing cobalt-and ferrous iron-containing ferromagnetic iron oxides |
JPS614202A (en) * | 1984-06-19 | 1986-01-10 | Sony Corp | Manufacture of magnetic powder made of acicular ferromagnetic iron oxide |
JPS6117426A (en) * | 1984-07-04 | 1986-01-25 | Sony Corp | Preparation of magnetic power of cobalt-containing iron oxide |
JPS63151621A (en) * | 1986-12-12 | 1988-06-24 | Toda Kogyo Corp | Production of needle-like magnetic iron oxide particle powder |
-
1978
- 1978-02-08 JP JP1330178A patent/JPS54106895A/en active Pending
Cited By (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4414245A (en) * | 1981-07-28 | 1983-11-08 | Ishihara Sangyo Kaisha, Ltd. | Process for producing cobalt containing ferromagnetic iron oxides |
JPS5860630A (en) * | 1981-10-07 | 1983-04-11 | Ishihara Sangyo Kaisha Ltd | Preparation of cobalt-containing ferromagnetic iron oxide |
JPS6132258B2 (en) * | 1981-10-07 | 1986-07-25 | Ishihara Sangyo Kaisha | |
US4551327A (en) * | 1982-07-16 | 1985-11-05 | Ishihara Sangyo Kaishi, Limited | Process for producing cobalt-and ferrous iron-containing ferromagnetic iron oxides |
JPH0425686B2 (en) * | 1983-01-28 | 1992-05-01 | Ishihara Sangyo Kaisha | |
JPS59138312A (en) * | 1983-01-28 | 1984-08-08 | Ishihara Sangyo Kaisha Ltd | Manufacture of magnetic ferrous oxide powder containing cobalt |
JPS59159502A (en) * | 1983-03-02 | 1984-09-10 | Ishihara Sangyo Kaisha Ltd | Manufacture of cobalt-containing magnetic oxidized iron powder |
JPH0430162B2 (en) * | 1983-03-02 | 1992-05-21 | ||
JPS59500739A (en) * | 1983-04-12 | 1984-04-26 | メモレックス・コーポレーション | ferromagnetic recording material |
JPS614202A (en) * | 1984-06-19 | 1986-01-10 | Sony Corp | Manufacture of magnetic powder made of acicular ferromagnetic iron oxide |
JPS6117426A (en) * | 1984-07-04 | 1986-01-25 | Sony Corp | Preparation of magnetic power of cobalt-containing iron oxide |
JPH0561206B2 (en) * | 1984-07-04 | 1993-09-03 | Sony Corp | |
JPS63151621A (en) * | 1986-12-12 | 1988-06-24 | Toda Kogyo Corp | Production of needle-like magnetic iron oxide particle powder |
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