| abstract |
An anisotropic magnetic powder having a sufficiently high coercive force even when the amount of rare earth compound used as a diffusing material is reduced is produced. An anisotropic magnetic powder manufacturing method includes a step of obtaining HDDR powder by hydrocracking / dehydrogenation recombination method, a step of preparing a mixed powder by mixing a diffusion material containing a rare earth compound and HDDR powder. And a step of diffusing elements contained in the diffusing material into the HDDR powder by heating the mixed powder, the diffusing material from a group consisting of hydride of Dy, Tb, Nd, Pr or La, fluoride and iron compound It contains a powder of at least one selected compound and further contains an aluminum powder. [Selection] Figure 2 |