JPS5756330A - Hexagonal ferrite powder - Google Patents

Hexagonal ferrite powder

Info

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
Application number
JP55132149A
Other languages
Japanese (ja)
Inventor
Toshihiko Oguchi
Hirohisa Kato
Akio Ishizawa
Mitsuo Yaegashi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura Electric Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP55132149A priority Critical patent/JPS5756330A/en
Publication of JPS5756330A publication Critical patent/JPS5756330A/en
Pending legal-status Critical Current

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
JP55132149A 1980-09-22 1980-09-22 Hexagonal ferrite powder Pending JPS5756330A (en)

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)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5092103A (en) * 1973-12-14 1975-07-23

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5092103A (en) * 1973-12-14 1975-07-23

Cited By (6)

* Cited by examiner, † Cited by third party
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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