Sm对Sm（Co，Cu，Fe，Zr）z永磁合金性能和退磁曲线方形度的影响

Effect of Sm on Magnetic Properties and Square Degrees of Demagnetization Curve of Sm(Co,Cu,Fe,Zr)z Permanent Magnet Alloys

本文探讨了高矫顽力Ｓｍ（Ｃｏ，Ｃｕ，Ｆｅ，Ｚｒ）ｚ（６８＜ｚ＜８．５）永磁合金的Ｓｍ含量对磁性能和退磁曲线方形度的影响，试验结果表明，磁性能和退磁曲线方形度与磁体的Ｓｍ含量有关，制备过程中的氧化和真空高温蒸发会改变磁体的有效Ｓｍ含量．当磁体Ｓｍ含量为２４．０—２４．５ｗｔ％，氧含量小于４０００ＰＰｍ时，可得到较佳的磁性能．Ｂｒ：１．０８—１．１４Ｔ，ｉＨｃ：１３５２．６—１５９１．３ＫＡ／ｍ，ｂＨｃ：７５５．９—８１９．５ＫＡ／ｍ，（ＢＨ）ｍ：２２６．８—２３８．７ＫＪ／ｍ３．最佳退磁曲线方形度为Ｋ＝０．９７７．

The effect of Sm content on the magnetic properties and the square degrees of demagnetization curve of high-coercivity Sm(Co,Cu,Fe,Zr)z(6.8<Z<8.5)permanent magnet alloys have been studied.The experimental results show that the magnetic properties and the square degrees of demagnetization curve of the magnets relate to Sm content.The oxidation and high-temperature evaporation in the preparation of samples change the effective Sm content in the magnets and influence on the magnetic properties.When Sm content is 24.0～24.5wt%,and oxyge content is smaller than 4000PPM,the magnet have better magnetic properties,Br:1.08～1.14T,iHc:1352.6～1591.3KA/m,bHc:755.9～819.5KA/m,(BH)m:226.8～238.7KJ/m3,The bet square degree on demagnetization curve is 0.977.