| 摘要 |
<P>PROBLEM TO BE SOLVED: To obtain permanent magnet particles of nano-order, whose magnetic characteristics are improved compared with a permanent magnet using conventional permanent magnet particles of micron-order, and to provide a producing method for a permanent magnet to be formed by granulating the permanent magnet particles of nano-order. <P>SOLUTION: A carbon mold is manufactured by adding water, hydrazine, NH<SB>3</SB>, and TEOS to a C-15/cyclohexane solution to form spherical silica, firing the spherical silica under an Ar atmosphere, and etching the spherical silica with NaOHaq. The manufactured carbon mold is vacuum-impregnated with an aqueous solution of metallic salt, and an aqueous solution of Ca(NO<SB>3</SB>) is added to the carbon mold. By this reduction diffusion treatment, permanent magnet particles are manufactured. Further, the permanent magnet particles are treated in such a procedure as to be granulated, mixed with resin, and molded, whereby the permanent magnet is produced. <P>COPYRIGHT: (C)2007,JPO&INPIT |
