| abstract |
An inexpensive R—Fe—B permanent magnet having a high coercive force is provided. In a fine powder of a pulverized R-Fe-B magnet, Si- (OR) x (wherein R is any one of alkyl groups having 2 to 6 carbon atoms, linear An organic metal compound solution to which an organic metal compound represented by (2) is added is added, and the organic metal compound is uniformly attached to the surface of the magnet particles. Thereafter, the green compact is subjected to calcination treatment in hydrogen by holding it in a hydrogen atmosphere at 200 ° C. to 900 ° C. for several hours. Thereafter, firing is performed at 800 ° C. to 1180 ° C., thereby including the R 2 (Fe, (Co), Si) 14 B main phase and the R—Fe (Co) —Si grain boundary phase, and not including the B-rich phase. The permanent magnet 1 having a structure is manufactured. [Selection] Figure 3 |