RARE EARTH PERMANENT MAGNET AND PRODUCTION METHOD FOR RARE EARTH PERMANENT MAGNET

摘要

There are provided a rare-earth permanent magnet and a manufacturing method of the rare-earth permanent magnet with improved magnetic performance which is achieved through milling-ability-improved fine wet-milling step. In the method, coarsely milled magnet material is finely wet-milled in an organic solvent together with an organometallic compound expressed with a structural formula of M-(OR) x (M including at least one of Nd, Al, Cu, Ag, Dy, Tb, V, Mo, Zr, Ta, Ti, W, andNb, R representing a substituent group consisting of a straight-chain or branched-chain hydrocarbon with carbon chain length of 2-16, and x representing an arbitrary integer) to obtain magnet powder and to make the organometallic compound adhere to particle surfaces of the magnet powder. Subsequently, the magnet powder having adhesion of the organometallic compound to particle surfaces thereof is formed into a formed body and sintered so as to obtain a permanent magnet 1.