JPS56134522A - Preparation of magnetic powder for magnetic recording use - Google Patents
Preparation of magnetic powder for magnetic recording useInfo
- Publication number
- JPS56134522A JPS56134522A JP3476380A JP3476380A JPS56134522A JP S56134522 A JPS56134522 A JP S56134522A JP 3476380 A JP3476380 A JP 3476380A JP 3476380 A JP3476380 A JP 3476380A JP S56134522 A JPS56134522 A JP S56134522A
- Authority
- JP
- Japan
- Prior art keywords
- powder
- magnetoplumbite
- 50mol
- precipitate
- preparation
- 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
Abstract
PURPOSE: To prepare the titled magnetic powder preventing the sintering and aggregation of the powder particles, by converting a mixture of AO, B2O3 and Fe2O3 having specific composition to amorphous, and heat-treating the product to precipitate magnetoplumbite-type ferrite fine particles.
CONSTITUTION: A mixture having a composition which falls within a region surrounded by the triangle of (a) B2O3=0, AO (A is Ba, Sr, Ca or Pb)=14.3mol%, Fe2O3 (including substituted components)=85.7mol%, (b) B2O3=0, AO= 16.7mol%, Fe2O3=83.3mol%, and (c) B2O3=50mol%, AO=50mol%, Fe2O3=0, in the triangular diagram having AO, B2O3 and Fe2O3 as three vertices, is molten by heating at about 1,350°C, and quenched to obtain an amorphous material. The amorphous material is heat-treated in air at 700W850°C for about 10hr to precipitate magnetoplumbite-type ferrite as fine particles. Mangetic powder suitable for the hgh density vertical magnetization recording can be obtained by this process.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP55034763A JPS6015575B2 (en) | 1980-03-21 | 1980-03-21 | Method for producing magnetic powder for magnetic recording |
DE19803041960 DE3041960C2 (en) | 1979-11-08 | 1980-11-06 | A method of manufacturing magnetic powder for high density magnetic recording |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP55034763A JPS6015575B2 (en) | 1980-03-21 | 1980-03-21 | Method for producing magnetic powder for magnetic recording |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS56134522A true JPS56134522A (en) | 1981-10-21 |
JPS6015575B2 JPS6015575B2 (en) | 1985-04-20 |
Family
ID=12423342
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP55034763A Expired JPS6015575B2 (en) | 1979-11-08 | 1980-03-21 | Method for producing magnetic powder for magnetic recording |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6015575B2 (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NL8304039A (en) * | 1982-11-25 | 1984-06-18 | Fuji Photo Film Co Ltd | MAGNETIC REGISTRATION MATERIAL. |
JPS6081028A (en) * | 1983-10-12 | 1985-05-09 | Tohoku Metal Ind Ltd | Manufacture of w-phase hexagonal ferrite particle |
JP2006306725A (en) * | 1995-07-13 | 2006-11-09 | Asahi Techno Glass Corp | Production method of hexagonal ferrite fine powder for functional thin film |
CN111685552A (en) * | 2020-06-24 | 2020-09-22 | 苏亮 | Magnetic suspension wind-force keeps away dirt and rotates show clothes hanger |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP5645865B2 (en) | 2012-03-30 | 2014-12-24 | 富士フイルム株式会社 | Hexagonal strontium ferrite magnetic powder and manufacturing method thereof, and magnetic recording medium and manufacturing method thereof |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4822265A (en) * | 1971-07-26 | 1973-03-20 | ||
JPS5032498A (en) * | 1973-06-11 | 1975-03-29 |
-
1980
- 1980-03-21 JP JP55034763A patent/JPS6015575B2/en not_active Expired
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4822265A (en) * | 1971-07-26 | 1973-03-20 | ||
JPS5032498A (en) * | 1973-06-11 | 1975-03-29 |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NL8304039A (en) * | 1982-11-25 | 1984-06-18 | Fuji Photo Film Co Ltd | MAGNETIC REGISTRATION MATERIAL. |
JPS6081028A (en) * | 1983-10-12 | 1985-05-09 | Tohoku Metal Ind Ltd | Manufacture of w-phase hexagonal ferrite particle |
JP2006306725A (en) * | 1995-07-13 | 2006-11-09 | Asahi Techno Glass Corp | Production method of hexagonal ferrite fine powder for functional thin film |
CN111685552A (en) * | 2020-06-24 | 2020-09-22 | 苏亮 | Magnetic suspension wind-force keeps away dirt and rotates show clothes hanger |
CN111685552B (en) * | 2020-06-24 | 2021-06-29 | 江洪燕 | Magnetic suspension wind-force keeps away dirt and rotates show clothes hanger |
Also Published As
Publication number | Publication date |
---|---|
JPS6015575B2 (en) | 1985-04-20 |
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