NEODYMIUM-BASED RARE EARTH SINTERED MAGNET AND METHOD OF MANUFACTURING THE SAME

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PROBLEM TO BE SOLVED : To reduce the use of a rare earth element while maintaining its magnetic property and to make improvement in the heat resistance and corrosion resistance which are bottlenecks unique to a magnetic material in a neodymium-based rare earth permanent magnet. SOLUTION : In the neodymium-based rare earth sintered magnet, the purity of a constituent element other than a gas component is 99.9 wt% or more, preferably 99.99 wt% or more, and more preferably 99.999 wt% or more. Thus, the content of neodymium can be reduced by 10% or more in comparison to a neodymium-based rare earth permanent magnet having a comparable or less than comparable maximum energy product (BH)max. COPYRIGHT : (C)2013, JPO&INPIT