Title:
磁気記録媒体用複合磁性粒子粉末及びその製造法並びに磁気記録媒体
Document Type and Number:
Japanese Patent JP4366553
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide magnetic particle powder for a magnetic recording medium which has excellent dispersibility and is excellent in durability and cleaning property of a magnetic head by stiffly fixing oxide fine particle powder on particle surfaces of the magnetic particle powder. SOLUTION: In compound magnetic particle powder, one kind or two or more kinds of oxide fine particle powder which is selected out of aluminium oxide, zirconium oxide, cerium oxide, titanium oxide, silicon oxide and molybdenum oxide and has a mean particle diameter of 0.001-0.07 μm, is fixed on particle surfaces of magnetic particle powder whose mean particle diameter is 0.01-0.3 μm by using silicon compound formed from tetraalkoxysilane. Ratio of the oxide fine particle powder to the magnetic particle powder is 0.1-20 wt.%.
Inventors:
Kazuyuki Hayashi
Mineko Osugi
Mamoru Kamaki
Hiroko Morii
Mineko Osugi
Mamoru Kamaki
Hiroko Morii
Application Number:
JP2000186185A
Publication Date:
November 18, 2009
Filing Date:
June 21, 2000
Export Citation:
Assignee:
Toda Kogyo Co., Ltd.
International Classes:
C01G49/00; H01F1/06; B22F1/02; G11B5/712; G11B5/842; H01F1/11
Domestic Patent References:
| JP1119519A | ||||
| JP56105337A | ||||
| JP7073443A | ||||
| JP3001503A | ||||
| JP2303006A | ||||
| JP7502864A | ||||
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