| 简介 |
PROBLEM TO BE SOLVED : To prevent decrease in the coercive force caused by isolated metal iron and to obtain a powder having stable coercive force with small variance by decreasing the amt. of isolated metal iron in a nitride magnetic powder to a specified value or lower in terms of an X-ray diffraction intensity ratio. SOLUTION : The amt. of isolated metal iron is decreased to <=3% in terms of an X-ray diffraction intensity ratio. Preferably, the magnetic powder consists of a magnetic material containing a nitride having a compsn. expressed by the formula of Rx Fe100-x-y Ny . In the formula, R is a rare earth metal element, (x) represents at.% of the rare earth metal element satisfying 3
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