Magnetic powder, a magnetic recording medium using the...

Details Magnetic powder, a magnetic recording medium using the... Magnetic powder, a magnetic recording medium using the...

2004-05-07

2008-08-05

Le, H. T (Department: 1794)

Stock material or miscellaneous articles

Coated or structually defined flake, particle, cell, strand,...

Particulate matter

C428S405000, C428S842100, C428S842200, C428S842300

Reexamination Certificate

active

07407705

ABSTRACT:
A magnetic powder composed primarily of Fe that has been surface-treated with a silane coupling agent, which magnetic powder is characterized in that it contains Co such that Co/Fe expressed in atomic percent is 20-50 at. %, Al such that Al/Fe expressed in atomic percent is 5-30 at. %, and one or more rare earth elements R (including Y) such that R/Fe expressed in atomic percent is 4-20 at. %, and has average particle diameter of smaller than 80 nm, TAP density of 0.7 g/cm3or greater, ignition point of 165° C. or higher, and oxygen content of 26 wt % or less.

REFERENCES:
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