磁场下球磨处理各向异性纳米级Sm2Co17磁粉的制备与分析

Study on the anisotropic Sm_2Co_(17) nanoflakes prepared by ball milling in magnetic field

2∶17型SmCo稀土永磁合金以良好的温度特性和较高的磁性能已成为不可或缺的高温永磁器件,通过球磨工艺,利用有机试剂庚烷和油酸对2∶17型Sm(CobalFe0.07Cu0.088Zr0.025)7.5磁粉表面包覆预处理,并在磁场强度为1.5T的外磁场下,对该磁粉进行细磨0.5～20h,制备得到厚度为20～100nm、具有各向异性能的纳米级磁片,其对应的磁性能(BH)m为127.36kJ/m3。

In this study, a new preparation method of Sm2Co17 flakes was investigated. Nanocrystalline hard magnetic Sm（Cohal Fe0.07Cu0.088Zr0.025）7.5 flakes with 20-100nm thickness were obtained by milling in heptanes and oleic acid under 1.5T magnetic field for 0.5-20 hours. It was shown that the magnetic anisotropy of the prepared 3m2Co17 flakes after aligned at 1. 5 T magnetic field could be further enhanced. The best （BH）m of 127.36kJ/ma was obtained for the magnetic anisotropic 3m2Co17 nano-flakes.