METHOD AND APPARATUS FOR MANUFACTURING MAGNETICALLY ANISOTROPIC RARE EARTH SINTERED MAGNET

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PROBLEM TO BE SOLVED : To provide a method for manufacturing a magnetically anisotropic rare earth sintered magnet that involves no orientation disturbance causing coercive force deterioration and does not scatter fine powders to be used as materials. SOLUTION : This method loads fine powders available as materials for magnetically anisotropic rare earth sintered magnets into a charge container up to a predetermined density in a scale/charger 41 and a densifier 42, orients the powders in a magnetic orientation facility 43 via a pulse magnetic field, and then sinters the oriented powders in a sintering furnace 44 without pressing them. Though conventional methods disturb fine particle orientation via a magnetic field in the press process or the demagnetization process required for the press process because they need to press the fine powders, this method causes no orientation disturbance. In addition, it prevents fine particles from scattering because it need not press them. COPYRIGHT : (C)2006, JPO&NCIPI