Is a
Patent attributes
Current Assignee
Patent Jurisdiction
Patent Number
Patent Inventor Names
Kimitaka Sato0
Date of Patent
August 5, 2008
0Patent Application Number
105556380
Date Filed
May 7, 2004
0Patent Primary Examiner
Patent 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/cm3 or greater, ignition point of 165° C. or higher, and oxygen content of 26 wt % or less.
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