Iron nitride based magnetic powder and magnet using the same
AssigneeTDK Corporation
InventorsHirotaka YOKOTA, Masakazu HOSONO, Kiyoyuki MASUSAWA
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Abstract
The present invention provides an iron nitride based magnetic powder which comprises the Fe16N2 phases and the Fe4N phases. The iron nitride based magnetic powder of the present invention is obtained by subjecting the iron oxide or the starting material to an reduction treatment and a nitriding treatment, wherein the starting material is obtained by covering the surfaces of the iron oxide particles by a Si-based compound as required. The iron nitride based magnetic powder consists of 70 at % or more and 95 at or less of the phases of Fe16N2. compound and 5 at % or more and 30 at % or less of the phases of Fe4N compound in terms of Fe as measured by the Mossbauer spectra.
Claims8
An iron nitride based magnetic powder, wherein,
- the content of the phase of Fe16N2 compound is 70at % or more and 95 at % or less and the content of the phase of Fe4N compound is 5 at % or more and 30 at % or less, in terms of Fe, measured by the Mossbauer spectra.
Dependencies are inferred from the claim text.