Preparing rare earth permanent magnets, and its production means preparing rare earth permanent magnets

A method for preparing rare earth permanent magnets, rare earth permanent magnet was prepared and apparatus for preparing technology relates to the preparation of sintered rare earth permanent magnet having a high coercive force. Wherein: wherein the methods of preparation can be in communication with each other, the two chambers may each be performed by a vacuum apparatus under reduced pressure treatment and heat treatment, the evaporation material is first placed in a first crushing chamber; member to be processed into the second chamber, two-compartment of the vacuum, so that a considerable degree of vacuum in the first chamber; member to be processed is transferred to the first chamber, a thermal diffusion treatment in the first chamber; Save the first chamber pressure, so that a considerable degree of vacuum of the second chamber; member to be processed is transferred back to the second chamber, the aging process in the second chamber. The present invention is not residual in the surface of the magnet powder, metal powder is evaporated, the evaporation efficiency is greatly improved, can be realized with less heavy rare-earth material with high remanence high coercivity magnets, and the magnet having a strong corrosion resistance .