| 摘要 |
PROBLEM TO BE SOLVED: To provide a ferrite forming material powder improved in fluidity by making the particle shape uniformly spherical even if the particle diameter is made small and the number of the structural particle is decreased, and the producing method and a granulating machine to be used therefore. SOLUTION: This ferrite forming material power particle is provided with a ferrite magnetic powder particle 11, a glass powder particle 12 and a binder, the ferrite magnetic powder particle has a ferrite magnetic powder particle 14 having a large particle diameter and a ferrite magnetic power particle 15 having small particle diameter and the ferrite forming material power particle is made spherical by aggregating the ferrite magnetic power particle 15 and the glass powder particle 12 around the ferrite magnetic powder particle 14 as the nucleus and sticking the ferrite magnetic powder particle 14, the ferrite magnetic powder particle 15 and the glass powder particle 12 to each other with the binder. |
