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为了降低具有卓越永磁性的Nd-Fe-B磁体的制造成本,使之更快得到推广使用,本文研究了采用还原—扩散工艺路线,直接用Nd_2O_3作为原材料制取Nd-Fe-B磁体的方法、研究了基本组元Nd和添加元素CO、Al的含量对永磁性能的影响,成功地制造出Nd-Fe-B系永磁体。其中最佳性能为Br=1.30T,_MH_C=0.46MA/m,(BH)_(max)=286.5KJ/m~3。实验结果还表明,氧在合金中起着有害作用,为了获得优异的磁性能,含氧量必须被控制在0.8％以下。
In order to reduce the manufacturing cost of Nd-Fe-B magnets with excellent permanent magnet properties and to promote them more quickly, this paper studies the method of producing Nd-Fe-B magnets using Nd_2O_3 as the raw material by reduction-diffusion process , The effects of basic element Nd and added elements CO and Al on permanent magnet properties were investigated, and Nd-Fe-B permanent magnets were successfully fabricated. The best performance was Br = 1.30T, _MH_C = 0.46MA / m, (BH) _ (max) = 286.5KJ / m ~ 3. The experimental results also show that oxygen plays a detrimental role in the alloy and oxygen content must be controlled below 0.8% in order to obtain excellent magnetic properties.