| 简介 |
[SUMMARY]
[PROBLEM TO BE SOLVED]
To provide a rare earth magnet protected from reduction in the coercive force at high temperatures and a production method thereof.
[MEANS TO SOLVE THE PROBLEM]
A rare earth magnet comprising a main phase and a grain boundary phase present around the main phase, wherein : the overall composition is represented by the formula : (Ndx(Ce, La)(1-x-y)R1y)pFe(100-p-q-r-s)CoqBrM1s·(R2zR3wM21-z-w)t, wherein R1 is one or more members selected from rare earth elements other than Nd, Ce and La, R2 is one or more members selected from Pr, Nd, Pm, Sm, Eu and Gd, R3 is one or more members selected from rare earth elements other than R2, M1 and M2 are a predetermined element, 5.0≤p≤20.0, 0≤q≤8.0, 4.0≤r≤6.5, 0≤s≤2.0, 0≤t≤10.0, 0.4≤x≤0.8, 0≤y≤0.1, 0.5≤z≤0.8, and 0≤w≤0.1 and La is contained in an amount of 1/9 to 3 times by molar ratio relative to Ce. |
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