| 摘要 |
PROBLEM TO BE SOLVED: To provide a effective producing method of a spherical inorganic particle having a large particle diameter, which satisfies three requirements that the particle diameter of the resultant particle is optionally controlled, the productivity and the yield of a raw material is excellent and a resultant product has high chemical purity. SOLUTION: The producing method of the spherical inorganic particle having large particle diameter is by granulating one or more kinds of an inorganic powder into a prescribe particle size and heating and melting. Concretely the inorganic material to be a raw material is Cr, Al, Ni, Zn, W, Y, Si and the oxide, the oxide precursor, the carbide, the borate and the nitride, the particle diameter of the granulated particle is >=1μm to <=500μm and the granulation is performed in a spray drier and the heating and melting are performed by dispersing into flame, plasma or arc. |
