JPS5625909A - Preparation of magnetic grain powder consisting of needle crystal alloy of iron, cobalt and zinc - Google Patents
Preparation of magnetic grain powder consisting of needle crystal alloy of iron, cobalt and zincInfo
- Publication number
- JPS5625909A JPS5625909A JP10234179A JP10234179A JPS5625909A JP S5625909 A JPS5625909 A JP S5625909A JP 10234179 A JP10234179 A JP 10234179A JP 10234179 A JP10234179 A JP 10234179A JP S5625909 A JPS5625909 A JP S5625909A
- Authority
- JP
- Japan
- Prior art keywords
- cobalt
- zinc
- specific
- needle crystal
- heating
- 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
- Compounds Of Iron (AREA)
- Paints Or Removers (AREA)
- Manufacture Of Metal Powder And Suspensions Thereof (AREA)
- Magnetic Record Carriers (AREA)
- Hard Magnetic Materials (AREA)
Abstract
PURPOSE: To obtain the magnetic grain powder consisting of needle crystal alloy of iron, cobalt and zinc which has superior magnetic and powder charactersitics and is suitable especially for magnetic materials for magnetic recording by using materials consisting of the needle crystal goethite grain containing specific cobalt and zinc, which are produced by the specific procedures, and applying heating and reduction to them under specific conditions.
CONSTITUTION: Water-soluble silicic salt should be previously added to the alkali solution which is to be used to obtain the solution containing Fe(OH)2, Co(OH)2 and Zn(OH)2 in a fixed ratio and indicating pH12 so that silicon occupies 0.1W0.7atom% against the whole metallic atoms (Fe, Co and Zn) and, after reacting the alkali solution mentioned above with ferrous salt and so on, the mixture is oxidized to produce the needle crystal grain containing goethite cobalt and zinc; after heating and dehydrating materials obtained from the produced grains, needle crystal hematite grains with cobalt and zinc, which have a fixed longitudinal axis length and a fixed axial ratio, are produced, burned by heating under a specific steam partial pressure consisting of heating steam and nonreduction gas and a specific temperature and reduced while heating at a specific temperature to obtain the magnetic grain powder consisting of needle crystal alloy of iron, cobalt and zinc with a specific average longitudinal axis length and a specific surface area.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP54102341A JPS5921922B2 (en) | 1979-08-10 | 1979-08-10 | Method for producing acicular Fe-Co-Zn alloy magnetic particle powder |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP54102341A JPS5921922B2 (en) | 1979-08-10 | 1979-08-10 | Method for producing acicular Fe-Co-Zn alloy magnetic particle powder |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5625909A true JPS5625909A (en) | 1981-03-12 |
JPS5921922B2 JPS5921922B2 (en) | 1984-05-23 |
Family
ID=14324794
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP54102341A Expired JPS5921922B2 (en) | 1979-08-10 | 1979-08-10 | Method for producing acicular Fe-Co-Zn alloy magnetic particle powder |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5921922B2 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4409020A (en) * | 1983-01-24 | 1983-10-11 | The United States Of America As Represented By The Secretary Of The Interior | Recovery of metals from grinding sludges |
JPS596502A (en) * | 1982-07-05 | 1984-01-13 | Mitsui Toatsu Chem Inc | Manufacture of improved ferromagnetic iron powder |
CN100417475C (en) * | 2006-03-10 | 2008-09-10 | 同济大学 | Production of metal zinc powder from zinc dust and zinc dross |
-
1979
- 1979-08-10 JP JP54102341A patent/JPS5921922B2/en not_active Expired
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS596502A (en) * | 1982-07-05 | 1984-01-13 | Mitsui Toatsu Chem Inc | Manufacture of improved ferromagnetic iron powder |
JPH0341963B2 (en) * | 1982-07-05 | 1991-06-25 | ||
US4409020A (en) * | 1983-01-24 | 1983-10-11 | The United States Of America As Represented By The Secretary Of The Interior | Recovery of metals from grinding sludges |
CN100417475C (en) * | 2006-03-10 | 2008-09-10 | 同济大学 | Production of metal zinc powder from zinc dust and zinc dross |
Also Published As
Publication number | Publication date |
---|---|
JPS5921922B2 (en) | 1984-05-23 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JPS5792527A (en) | Preparation of needle-like ferric oxide | |
JPS5625909A (en) | Preparation of magnetic grain powder consisting of needle crystal alloy of iron, cobalt and zinc | |
KR890001485B1 (en) | Process for producing cobalt containing ferromagnetic iron oxid | |
JPS5625908A (en) | Preparation of magnetic grain powder consisting of needle crystal alloy of iron and cobalt | |
JPS56156706A (en) | Manufacture of magnetic metallic powder | |
JPS54106895A (en) | Ferromagnetic powder | |
JPS5370397A (en) | Strongly magnetic metallic powder, preparation of same and magneticrecording media emplying same | |
JPS57140307A (en) | Manufacture of metallic nitride powder for magnetic recording | |
JPS5562105A (en) | Production of magnetic alloy powder | |
JPS55125538A (en) | Magnetic recording medium | |
JPS55129935A (en) | Magnetic recording medium | |
JPS55161008A (en) | Production of needle-like crystaline fe-zn alloy magnetic particle powder | |
JPS5625904A (en) | Ferromagnetic powder and its preparation | |
JPS56114833A (en) | Production of fine particle of iron compound for magnetic recording | |
JPS55161007A (en) | Production of needle-like crystalline metal iron magnetic particle powder | |
JPS55141505A (en) | Production of metal powder | |
JPS5616604A (en) | Manufacture of ferromagnetic iron-cobalt alloy powder | |
JPS5723003A (en) | Manufacture of magnetic metal powder | |
JPS5388698A (en) | Production of beta-iron oxyhydroxide powder | |
JPS5632333A (en) | Manufacture of ferromagnetic material | |
JPS56160329A (en) | Manufacture of magnetic iron oxide powder | |
JPS5275700A (en) | Production of magnetic iron oxide powder including co | |
JPS5613409A (en) | Manufacture of ferromagnetic alloy powder | |
JPS5626731A (en) | Manufacture of needle crystal magnetic iron oxide particle powder containing co | |
JPS56166310A (en) | Manufacture of needlelike iron-base ferromagnetic metallic powder |