JPS5616605A - Manufacture of ferromagnetic iron-cobalt alloy powder - Google Patents
Manufacture of ferromagnetic iron-cobalt alloy powderInfo
- Publication number
- JPS5616605A JPS5616605A JP9170279A JP9170279A JPS5616605A JP S5616605 A JPS5616605 A JP S5616605A JP 9170279 A JP9170279 A JP 9170279A JP 9170279 A JP9170279 A JP 9170279A JP S5616605 A JPS5616605 A JP S5616605A
- Authority
- JP
- Japan
- Prior art keywords
- goethite
- uniformly
- gas
- cobalt
- 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
Landscapes
- Paints Or Removers (AREA)
- Manufacture Of Metal Powder And Suspensions Thereof (AREA)
- Magnetic Record Carriers (AREA)
- Hard Magnetic Materials (AREA)
Abstract
PURPOSE: To deposit cobalt hydroxide uniformly on the surface of goethite, by suspending to goethite in an aqueous soln. contg. cobalt ions, and by using ammonia for the neutralizing agent.
CONSTITUTION: A reducing agent for reducing goethite, or needlelike ferric hydroxide, is utilized effectively. An alkali is added to an aqueous medium contg. cobalt ions and dispersed goethite particles so as to stick the cobalt hydroxide to the surface of goethite particles. For the alkali, ammonia gas or a mixture of ammonia gas and an inert gas is supplied to the aqueous medium to form bubbles thereby depositing cobalt hydroxide directly on the surface of the goethite uniformly. Nitrogen or air may be used as the inert gas. The neutralization takes place highly uniformly and its rate can be controlled by varying the quantity of gas.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP54091702A JPS5919162B2 (en) | 1979-07-20 | 1979-07-20 | Method for producing iron-cobalt alloy ferromagnetic powder |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP54091702A JPS5919162B2 (en) | 1979-07-20 | 1979-07-20 | Method for producing iron-cobalt alloy ferromagnetic powder |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5616605A true JPS5616605A (en) | 1981-02-17 |
JPS5919162B2 JPS5919162B2 (en) | 1984-05-02 |
Family
ID=14033844
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP54091702A Expired JPS5919162B2 (en) | 1979-07-20 | 1979-07-20 | Method for producing iron-cobalt alloy ferromagnetic powder |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5919162B2 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS59157204A (en) * | 1983-02-23 | 1984-09-06 | Chisso Corp | Manufacture of ferromagnetic metallic fine particle |
US6558503B1 (en) | 1999-09-16 | 2003-05-06 | Bae Systems Plc | Method of producing a joint |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS62133662U (en) * | 1986-02-14 | 1987-08-22 |
-
1979
- 1979-07-20 JP JP54091702A patent/JPS5919162B2/en not_active Expired
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS59157204A (en) * | 1983-02-23 | 1984-09-06 | Chisso Corp | Manufacture of ferromagnetic metallic fine particle |
JPS62204B2 (en) * | 1983-02-23 | 1987-01-06 | Chisso Corp | |
US6558503B1 (en) | 1999-09-16 | 2003-05-06 | Bae Systems Plc | Method of producing a joint |
Also Published As
Publication number | Publication date |
---|---|
JPS5919162B2 (en) | 1984-05-02 |
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