Nd21Pr7Gd4Fe66.02Cu0.2Al0.7B1.08磁体添加纳米粉MgO研究

摘要

This paper studies the effects of adding nano MgO powder on Nd21 Pr7Gd4Fe66.02Cu0.2Al0.7B1.08 magnet. Research by SEM and EDS analysis show. nano powder MgO is mainly in the grain boundary of magnets. By XRD analysis and adding 0.2% MgO magnets main crystal grain(006)orientation are well developed with bet-ter crystal orientation. The Nd21 Pr7Gd4Fe66.02Cu0.2Al0.7B1.08 magnet of adding 0.2% MgO has the highest residual magnetic flux density of 1.204 T, adding 0.4% MgO magnet has the highest coercivity of 11.71 KA m-1;mag-net adding MgO corrosion resistance is better than that without the addition of MgO magnet.%研究了添加纳米粉MgO对Nd21Pr7Gd4Fe66.02Cu0.2Al0.7B1.08磁体的影响。通过扫描电镜能谱研究分析可知，纳米粉MgO主要分布于磁体的晶界相当中。通过XRD分析可知：添加w（MgO）=0.2%的纳米粉MgO，磁体主晶粒（006）晶向晶粒发育良好，晶粒取向度较好；添加w（MgO）=0.2%的纳米粉MgO，磁体Nd21Pr7Gd4Fe66.02Cu0.2Al0.7B1.08有最高的剩磁（1.204 T）；添加w（MgO）=0.4%纳米粉MgO，磁体Nd21Pr7Gd4Fe66.02Cu0.2Al0.7B1.08有最高的矫顽力（11.70 kA/m）；添加MgO的磁体比未添加MgO的磁体耐腐蚀性要好。