| 简介 |
PROBLEM TO BE SOLVED : To provide a method of producing a rare-earth sintered magnet which increases the strength of a molding and enhances magnetic properties of a sintered magnet obtained finally.
SOLUTION : A method of producing a rare-earth sintered magnet comprises a step of pulverizing raw material alloy powder to obtain pulverized powder, a step of applying a magnetic field to the pulverized powder and press-molding the pulverized powder to obtain a molding, and a step of sintering the molding. A lubricant including paraffin and a compound represented by one of the group composed of R1-OCO-R2, R1-OCO-R3-OH, R1-OH, and (R1-COO)mM is added to the pulverized powder, and then the molding is formed, where R1 is CnH2n+1 or CnH2n-1, R2 is H or CnH2n+1, R3 is CnH2n, M is a metal, and n and m are an integer.
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