Gd含量对烧结NdFeB永磁体热稳定性的影响  

Effects of Gd addition on the temperature stability of the sintered Nd-Fe-B magnets

作　　者：张雪峰[1,2] 张倩[2,3] 

机构地区：[1]内蒙古科技大学内蒙古自治区白云鄂博矿多金属资源综合利用重点实验室,内蒙古包头014010 [2]内蒙古科技大学数理与生物工程学院,内蒙古包头014010 [3]廊坊师范学院物理与电子信息学院,河北省廊坊065700

出　　处：《内蒙古科技大学学报》2012年第4期341-344,共4页Journal of Inner Mongolia University of Science and Technology

摘　　要：选择不同Gd含量制备了永磁材料,使用磁性能测量设备NIM-200C和环境扫面电子显微镜FEI QUAN-TA400研究了(GdxPrNd1-x)33.2Fe65.25Al0.5B1.05(x=1.5,3,4.5,6,7.5,9)的温度稳定性和显微结构.结果表明,在(GdxPrNd1-x)33.2Fe65.25Al0.5B1.05中,当Gd的质量分数为3%时,样品具有最高矫顽力1 015 kA/m,较好的剩磁1.203 T,以及最好的温度稳定性.在200℃时的剩磁温度系数为-0.001 27%/℃,矫顽力温度系数为-0.004 94%/℃.Gd的添加在一定程度上减少了α-Fe相,并使富稀土相均匀化分布,从而提高了铸锭的破碎性能和磁体的致密程度.The permanent magnetic materials of different Gd content were prepared.The temperature stability and microstructure of(GdxPrNd1-x)33.2Fe65.25Al0.5B1.05(x=1.5,3,4.5,6,7.5,9)were studied using NIM-200℃ magnetic measurement equipment and FEI QUANTA400 scan telescope.The result shows that the sample has the highest coercivity 1015KA/m,better remanence of 1.203 T,and the best temperature stability when the Gd fraction is 3%.The temperature coefficient of residual magnetism is-0.00127%/ ℃ and the temperature coefficients of coercive force is-0.004 94%/℃ at 200 ℃.Due to the addition of Gd,α-Fe phase is reduced and the distribution of the rich rare earth phase is improved.

关 键 词：Gd含量 烧结NDFEB 温度稳定性 

分 类 号：TM273[一般工业技术—材料科学与工程]