JPS5623201A - Production of needle crystal fe-zn alloy magnetic particle powder - Google Patents
Production of needle crystal fe-zn alloy magnetic particle powderInfo
- Publication number
- JPS5623201A JPS5623201A JP9788879A JP9788879A JPS5623201A JP S5623201 A JPS5623201 A JP S5623201A JP 9788879 A JP9788879 A JP 9788879A JP 9788879 A JP9788879 A JP 9788879A JP S5623201 A JPS5623201 A JP S5623201A
- Authority
- JP
- Japan
- Prior art keywords
- needle crystal
- gas
- contg
- particle powder
- alloy
- 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 produce magnetic powder of needle crystal Fe-Zn alloy of superior magnetic characteristics by oxidizing an aqueous mixed soln. of Fe(OH)2 and Zn(OH)2 by O2 gas to allow Zn-contg. needle crystal goethite particles to form and subjecting the same to calcine and reduction treatment after filtering.
CONSTITUTION: An aqueous finely and uniformly mixed soln. of Fe(OH)2 and Zn(OH)2 of 0.1W2.3atom% of Zn(OH)2 with respect to Fe in Zn equiv. and ≥11 in pH is oxidized by an O2-contg. gas to allow Zn-contg. needle crystal goethite particles to form. After these are separated by filtering and are rinsed followed by drying, they are dehydrated under heating and are further calcined by being heated in an atmosphere comprising heating steam and nonreducing gas of 30W100% in steam partial pressure to 350W700°C. Since this yields the needle crystal hematite particles of 0.1W2.0μm mean long axial length and 10W30m2/g specific surface area by a BET method, these are reduced at 350W600°C in a reducing gas, whereby the Fe-Zn alloy magnetic particle powder of superior saturated magnetic flux density and coercive force is produced.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP54097888A JPS5921364B2 (en) | 1979-07-30 | 1979-07-30 | Method for producing acicular Fe-Zn alloy magnetic particle powder |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP54097888A JPS5921364B2 (en) | 1979-07-30 | 1979-07-30 | Method for producing acicular Fe-Zn alloy magnetic particle powder |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5623201A true JPS5623201A (en) | 1981-03-05 |
JPS5921364B2 JPS5921364B2 (en) | 1984-05-19 |
Family
ID=14204281
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP54097888A Expired JPS5921364B2 (en) | 1979-07-30 | 1979-07-30 | Method for producing acicular Fe-Zn alloy magnetic particle powder |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5921364B2 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS56166312A (en) * | 1980-05-27 | 1981-12-21 | Hitachi Maxell Ltd | Manufacture of metallic magnetic powder |
US4844977A (en) * | 1983-05-10 | 1989-07-04 | Konishiroku Photo Industry Co., Ltd. | Magnetic recording medium |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6414870U (en) * | 1987-07-20 | 1989-01-25 |
-
1979
- 1979-07-30 JP JP54097888A patent/JPS5921364B2/en not_active Expired
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS56166312A (en) * | 1980-05-27 | 1981-12-21 | Hitachi Maxell Ltd | Manufacture of metallic magnetic powder |
US4844977A (en) * | 1983-05-10 | 1989-07-04 | Konishiroku Photo Industry Co., Ltd. | Magnetic recording medium |
Also Published As
Publication number | Publication date |
---|---|
JPS5921364B2 (en) | 1984-05-19 |
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