【摘要】 通过热压/热变形工艺制备了掺杂Ca F2的(Nd1-xCex)29FebalB0.9M(x=0.1,0.15,0.2,0.3,M=Co和Ga等)磁体,研究发现随Ca F2掺杂量增加,电阻率逐渐升高,磁性能逐渐下降。当Ca F2添加量为3wt%时,随Ce取代量的增加,矫顽力呈先上升后下降的趋势。当Ca F2掺杂量为3%,Ce含量x=0.15时,性能最优,剩磁为11.26k G,磁能积为21.93 MGOe,矫顽力达到最大值9.49 k Oe,电阻率达到269μ?·cm,与无掺杂Ca F2热压/热变形工艺制备的钕铁硼磁体电阻率230μ?·cm相比提高了13%。通过对热压/热变形磁体中Ca F2添加量和Ce含量的优化,提供了一种较高电阻率、低成本高磁性能的(Nd1-xCex)29FebalB0.9M热压/热变形磁体。更多还原

【Abstract】 (Nd1-xCex)29FebalB0.9M(x=0.1, 0.15, 0.2, 0.3, and M=Co, Ga, etc) doping with Ca F2 were prepared by hot pressing and hot deforming process. The resistivity and magnetic properties were found increases and decrease with the increase of Ca F2 content. For Ca F2 content amount of 3 wt %, with the increase of the Ce content, the coercivity increases firstly and then decreases. When Ce content x=0.15, the magnet shows the highest properties: Br=11.26 k G,(BH)max=21.93 MGOe, maximum coercivity of 9.49 k Oe and resistivity of 269μ?·cm. Compared with pure Nd Fe B without doping Ca F2(230μ?·cm), the resistivity increases by 13%. By optimizing the content of Ca F2 and Ce,(Nd1-xCex)29FebalB0.9M hot pressed & hot deformed magnet with high resistivity and low cost is provided.更多还原