| 简介 |
[Problem] To provide a rare-earth magnet which can be used even in a high-temperature environment and in which high-temperature demagnetization is suppressed. [Solution] A sintered rare-earth magnet is configured to include main-phase grains having a B concentration difference within the main-phase grains. In other words, the present invention provides a rare-earth magnet that contains, as a main phase, crystal grains having an R2T14B crystalline structure, wherein : main-phase grains include main-phase grains having a B concentration difference within the grains; by configuring the concentration ratio A (A=αB/βB) between αB and βB, when the maximum concentration of B in the main-phase grains having a concentration difference is termed αB and the minimum concentration is termed βB, to be 1.05 or more, crystal magnetic anisotropy distribution is generated in the main phase; and due to this, the impact of heat is reduced and high-temperature demagnetization is suppressed. |
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