烧结Nd-Fe-B磁体的热静态充磁  

Thermal Static Magnetizing of Sintered Nd-Fe-B Magnets

作　　者：王发立[1] 何若冲[2] 张茂才[1] 

机构地区：[1]北京科技大学新金属国家重点实验室,北京100080 [2]山东大学物理学院,济南250100

出　　处：《金属功能材料》2012年第5期1-5,共5页Metallic Functional Materials

摘　　要：研究了两种不同剩磁、不同内禀矫顽力的烧结Nd-Fe-B磁体在Sm-Co磁路中的热静态充磁,结果表明,在约290℃下以低于4428Oe的弱气隙磁场即可实现各种烧结Nd-Fe-B磁体的饱和充磁。这可能是因为烧结Nd-Fe-B磁体在温度为T=Tc-(20～30℃)下磁化率达到最大值的缘故。本文还用二维有限元软件计算了Sm-Co磁路在290℃下的气隙磁场。Two kind of sintered Nd-Fe-B magnets with different remanent and intrinsic coercivity were thermally magnetized in the static circuit building by Sm-Co magnet. It is shown that a weak air-gap magnetic field of less than 4428 Oe is enough to magnetize the sintered Nd-Fe-B.magnets to saturation at about 290 ℃. It is very possible that the susceptibility of the sintered Nd-Fe-B magnets at a temperature of T =To-（20～30 ℃ ） reaches the maximum. The air gap field of the Sm-Co circuit at 290 ℃ was calculated by using 2D finite element method.

关 键 词：烧结Nd—Fe—B磁体 热充磁 有限元计算 

分 类 号：TM273[一般工业技术—材料科学与工程]