| 摘要 |
<P>PROBLEM TO BE SOLVED: To improve a magnetic characteristic by which a progress of nitriding is promoted in an iron-nitride magnetic powder to effectively prevent a sintering by using a Goethite resulting from dissolving Al. <P>SOLUTION: The iron-nitride powder mainly comprised of Fe<SB>16</SB>N<SB>2</SB>contains the dissolved Al, and is obtained by applying a nitriding treatment to an α-Fe powder obtained by reducing the Goethite coated by Zn. An average particle diameter of a long diameter can be 20 nm or smaller. It is desirable that Zn content to Fe is 0.05 to 5% in atomic ratio. Particularly, when an X-ray diffraction is conducted by Co-Kα-ray, it is a favorable object that the powder has a relation of equation (1): I<SB>50</SB>/I<SB>52</SB>≥1.5 between a peak height I<SB>50</SB>in a range of 2θ: 49.5 to 50.5° of the X-ray diffraction pattern and the peak height I<SB>52</SB>of the range of 2θ: 51.5 to 53.0°. <P>COPYRIGHT: (C)2007,JPO&INPIT |
