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Patent Searching and Data


Title:
FINE FERROMAGNETIC POWDER FOR MAGNETIC RECORDING
Document Type and Number:
WIPO Patent Application WO/1988/008611
Kind Code:
A1
Abstract:
Fine ferromagnetic powder for magnetic recording and a process for its production are disclosed. The fine powder comprises platy ferrite crystal particles which have a composition of 1/50 to 1/8 in a molar ratio of Ba/Fe and 0.07 mol to less than 0.5 mol in total of Ni and Zn per mol of Fe, which have a crystalline phase of magnetoplumbite, spinel or composite phases thereof, and which have a saturation magnetization of not less than 60 emu/g.

Inventors:
Nakata
Kazuo, Hirai
Masaharu, Takumi
Nobusuke, Kato
Saburo
Application Number:
PCT/JP1988/000391
Publication Date:
November 03, 1988
Filing Date:
April 21, 1988
Export Citation:
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Assignee:
ISHIHARA SANGYO KAISHA, LTD
Nakata, Kazuo Hirai Masaharu Takumi Nobusuke Kato Saburo
International Classes:
G11B5/706; (IPC1-7): H01F1/11; C01G49/00
Foreign References:
JPS56118305A1981-09-17
JPS56160328A1981-12-10
JPH05856302A
Other References:
See also references of EP 0310682A4
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