JPS5475597A - Preparation of metal podwer for magnetic recording - Google Patents
Preparation of metal podwer for magnetic recordingInfo
- Publication number
- JPS5475597A JPS5475597A JP14268377A JP14268377A JPS5475597A JP S5475597 A JPS5475597 A JP S5475597A JP 14268377 A JP14268377 A JP 14268377A JP 14268377 A JP14268377 A JP 14268377A JP S5475597 A JPS5475597 A JP S5475597A
- Authority
- JP
- Japan
- Prior art keywords
- metal
- magnetic recording
- reducing
- cobalt
- podwer
- 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
- Paints Or Removers (AREA)
- Manufacture Of Metal Powder And Suspensions Thereof (AREA)
- Magnetic Record Carriers (AREA)
- Hard Magnetic Materials (AREA)
Abstract
PURPOSE: To obtain metal cobalt powder with excellent electromagnetic conversion properties by reducing cobalt oxyhydroxide by means of prescribed processes.
CONSTITUTION: Using cobalt oxyhydroxide (CoO.OH) as a starting material, which is obtained for instance by a reaction of cobalt sulfate with sodium hydroxide. Obtaining Co metal powder by heat treating above mentioned starting meterial to convert to Co2O3 and then reducing it, or by reducing the starting material directly. Co metal powder for magnetic recording with execellent electromagnetic conversion properties can be obtained by this process.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP14268377A JPS5475597A (en) | 1977-11-30 | 1977-11-30 | Preparation of metal podwer for magnetic recording |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP14268377A JPS5475597A (en) | 1977-11-30 | 1977-11-30 | Preparation of metal podwer for magnetic recording |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5475597A true JPS5475597A (en) | 1979-06-16 |
Family
ID=15321085
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP14268377A Pending JPS5475597A (en) | 1977-11-30 | 1977-11-30 | Preparation of metal podwer for magnetic recording |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5475597A (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS59173207A (en) * | 1983-03-18 | 1984-10-01 | Hitachi Maxell Ltd | Metal cobalt magnetic powder and preparation thereof |
US5057299A (en) * | 1989-12-08 | 1991-10-15 | Minnesota Mining And Manufacturing Company | Method for making beta cobaltous hydroxide |
US6596051B2 (en) * | 2000-08-31 | 2003-07-22 | Osram Sylvania Inc. | Heterogenite material for making submicron cobalt metal powders |
CN103878389A (en) * | 2014-03-29 | 2014-06-25 | 宇辰新能源材料科技无锡有限公司 | Production method for coarse-particle cobalt powder |
CN104439280A (en) * | 2014-12-09 | 2015-03-25 | 英德佳纳金属科技有限公司 | Simultaneous preparing method of cobalt hydroxide and cobalt powder |
-
1977
- 1977-11-30 JP JP14268377A patent/JPS5475597A/en active Pending
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS59173207A (en) * | 1983-03-18 | 1984-10-01 | Hitachi Maxell Ltd | Metal cobalt magnetic powder and preparation thereof |
JPH0553843B2 (en) * | 1983-03-18 | 1993-08-11 | Hitachi Maxell | |
US5057299A (en) * | 1989-12-08 | 1991-10-15 | Minnesota Mining And Manufacturing Company | Method for making beta cobaltous hydroxide |
US5338473A (en) * | 1989-12-08 | 1994-08-16 | Minnesota Mining And Manufacturing Company | Aqueous beta cobaltous hydroxide and method for making |
US6596051B2 (en) * | 2000-08-31 | 2003-07-22 | Osram Sylvania Inc. | Heterogenite material for making submicron cobalt metal powders |
CN103878389A (en) * | 2014-03-29 | 2014-06-25 | 宇辰新能源材料科技无锡有限公司 | Production method for coarse-particle cobalt powder |
CN103878389B (en) * | 2014-03-29 | 2016-03-30 | 宇辰新能源材料科技无锡有限公司 | A kind of production method of coarse granule cobalt powder |
CN104439280A (en) * | 2014-12-09 | 2015-03-25 | 英德佳纳金属科技有限公司 | Simultaneous preparing method of cobalt hydroxide and cobalt powder |
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