JPS5756330A - Hexagonal ferrite powder - Google Patents
Hexagonal ferrite powderInfo
- Publication number
- JPS5756330A JPS5756330A JP55132149A JP13214980A JPS5756330A JP S5756330 A JPS5756330 A JP S5756330A JP 55132149 A JP55132149 A JP 55132149A JP 13214980 A JP13214980 A JP 13214980A JP S5756330 A JPS5756330 A JP S5756330A
- Authority
- JP
- Japan
- Prior art keywords
- powder
- 100pts
- mixed
- output characteristics
- recording medium
- 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
Abstract
PURPOSE: To enhance the high recording density and output characteristics of hexagonal ferrite powder as a magnetic recording medium by treating the powder surface with a specified phosphoric ester surfactant.
CONSTITUTION: In a side grinder 100pts.wt. magnetic powder of hexagonal Ba ferrite having 0.01W0.3μm particle size, 100pts.wt. deionized water and 4pts.wt.at least 1 kind of phosphoric ester surfactant represented by formulaIor II (where R is 2W12C hydrocarbon, and n in 3W9) are dispersed and mixed for 2hr. The mixture is dried with a spray dryer to form powder, and 75wt% this powder is put in a resin soln. consisting of 75pts.wt. 1:1 mixed sonl. of methyl isobutyl ketone and toluene and of 17pts.wt. vinyl chloride-vinyl acetate copolymer. They are milled with a ball mill for 40hr, and the resulting material is applied to a polyester film and oriented to manufacture a magnetic recording medium with superior high recording density and output characteristics.
COPYRIGHT: (C)1982,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP55132149A JPS5756330A (en) | 1980-09-22 | 1980-09-22 | Hexagonal ferrite powder |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP55132149A JPS5756330A (en) | 1980-09-22 | 1980-09-22 | Hexagonal ferrite powder |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5756330A true JPS5756330A (en) | 1982-04-03 |
Family
ID=15074497
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP55132149A Pending JPS5756330A (en) | 1980-09-22 | 1980-09-22 | Hexagonal ferrite powder |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5756330A (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5972104A (en) * | 1982-10-19 | 1984-04-24 | Toshiba Corp | Magnetic powder |
JPS5996532A (en) * | 1982-11-25 | 1984-06-04 | Fuji Photo Film Co Ltd | Magnetic recording body |
JP2007327048A (en) * | 2006-05-18 | 2007-12-20 | Lanxess Deutschland Gmbh | Oxidation-stable iron oxide pigment, method for preparing the same and use thereof |
JP2011219611A (en) * | 2010-04-08 | 2011-11-04 | San Nopco Ltd | Metal oxide particle dispersion |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5092103A (en) * | 1973-12-14 | 1975-07-23 |
-
1980
- 1980-09-22 JP JP55132149A patent/JPS5756330A/en active Pending
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5092103A (en) * | 1973-12-14 | 1975-07-23 |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5972104A (en) * | 1982-10-19 | 1984-04-24 | Toshiba Corp | Magnetic powder |
JPS5996532A (en) * | 1982-11-25 | 1984-06-04 | Fuji Photo Film Co Ltd | Magnetic recording body |
JPH0479045B2 (en) * | 1982-11-25 | 1992-12-14 | Fuji Photo Film Co Ltd | |
JP2007327048A (en) * | 2006-05-18 | 2007-12-20 | Lanxess Deutschland Gmbh | Oxidation-stable iron oxide pigment, method for preparing the same and use thereof |
JP2014095086A (en) * | 2006-05-18 | 2014-05-22 | Lanxess Deutschland Gmbh | Oxidation-stable iron oxide pigments, process for preparing them and their use |
JP2011219611A (en) * | 2010-04-08 | 2011-11-04 | San Nopco Ltd | Metal oxide particle dispersion |
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