PERMANENT MAGNET AND PRODUCTION METHOD FOR PERMANENT MAGNET

摘要

Provided are a permanent magnet and a production method for a permanent magnet, whereby: the amount of carbon contained in magnet particles prior to sintering can be reduced beforehand, even if wet grinding is used; no gaps are caused between the main phase and the grain boundary phase of the magnet after sintering; and the whole magnet can be densely sintered. A roughly ground magnet powder is ground in an organic solvent using a bead mill, then a molded body formed by powder compacting undergoes calcination in hydrogen by holding same for several hours at 200-900°C in a hydrogen atmosphere pressurized to a greater pressure than atmospheric pressure. Then, the permanent magnet (1) is produced by baking.