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Abstract

A high-compactness bonded rare earth permanent magnet and a preparation method thereof. Raw materials of the rare earth permanent magnet are calculated by mass percentage and include a thermosetting resin, a lubricant, a coupling agent, and the balance being a rare earth permanent magnetic powder. The preparation method includes: mixing the rare earth permanent magnetic powder with an organic solution containing the thermosetting resin to obtain a magnetic powder complex, mixing the magnetic powder complex with the lubricant, filling into a mold and compressing and molding at 12-50 T/cm² for 0.3-10 s, demolding to obtain a green body, heating the green body at 120-200° C. and obtaining a rough blank for precision machining. The high-compactness bonded rare earth permanent magnet shortens distances among micro powder particles in the bonded magnet effectively, enhances the magnetization effect of micro powder and strengthens the interaction force thereof after magnetization.

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First Claim