中文摘要：

在Nd—Fe—B合金中添加Gd、Ho元素，可促进Nd2Fe14B柱状晶的生长，使富Nd相分布均匀，细化磁体的晶粒。添加Ho对磁体内禀矫顽力提高较好，添加Gd对磁体J—H退磁曲线的方形度提高较好，但磁体的剩磁与磁能积会降低。Gd、Ho的添加可以降低磁体的开路磁通不可逆损失，使得磁体具有较好的热稳定性。

英文摘要：

Adding Gd and Ho to Nd-Fe-B alloys can promote the growth of Nd2Fe14B columnar crystal , result in an u- niform distribution of Nd - rich phase, and refine the grain size of the magnet. Ho can improve the intrinsic coercivity, C,d can enhance the square degrees of the demagnetization curve, but the remanence and magnetic energy product will be lower. More- over, Gd and Ho can reduce the open flux irreversible loss, and make magnets with better thermostability.