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发明授权
CN107240468B R-T-B系永久磁铁 有权

R-T-B系永久磁铁
摘要：
本发明提供一种R‑T‑B系永久磁铁，含有R‑T‑B系化合物作为主相结晶颗粒，其中，R为稀土类元素，T为必须有Fe或者Fe和Co的铁族元素，B为硼，并且含有相邻的两个所述主相结晶颗粒间的二颗粒晶界，所述主相结晶颗粒的平均粒径为0.9μm以上2.8μm以下，所述二颗粒晶界厚度为5nm以上200nm以下，由此，可以得到良好的矫顽力和磁化特性。
摘要（英）：

An R-T-B based permanent magnet includes R-T-B based compounds as main-phase crystal grains. R is a rare earth element. T is iron group element(s) essentially including Fe or Fe and Co. B is boron. A two-grain boundary is contained between the two adjacent main-phase crystal grains. An average grain size of the main-phase crystal grains is 0.9 μm or more and 2.8 μm or less. A thickness of the two-grain boundary is 5 nm or more and 200 nm or less.

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