| 摘要 |
PROBLEM TO BE SOLVED: To obtain magnet powders having high magnetic characteristics by a method wherein at least magnet plumbite strontium ferrite and a α-Fe phase are contained in the same particles. SOLUTION: Magnet powders contain at least magnet plumbite type strontium ferrite and a α-Fe phase in the same particles. Further, in the method for manufacturing these magnet powders, magnet plumbite type strontium ferrite powders are heated at 200 to 350 deg.C under the reduction atmosphere. Further, in a method for manufacturing these magnet powders, the strontium ferrite powders employ powders obtained by heating a solution containing strontium nitrate and complex of iron nitrate and an amino acid. As described above, as the fine α-Fe phase exists in the same particles, characteristics as a spring magnet are given and residue magnetic flux density and a coercive force are enhanced, so that high polymer composite type oxide magnet powders having high magnetic characteristics and its manufacturing method can be obtained. |
