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還原—擴散法制取Nd-Fe-B系磁體

Nd-Fe-B Magnet Made by Reduction Diffusion process

  • 摘要: 為了降低具有卓越永磁性的Nd-Fe-B磁體的制造成本,使之更快得到推廣使用,本文研究了采用還原—擴散工藝路線,直接用Nd2O3作為原材料制取Nd-Fe-B磁體的方法、研究了基本組元Nd和添加元素CO、Al的含量對永磁性能的影響,成功地制造出Nd-Fe-B系永磁體。其中最佳性能為Br=1.30 T,MHC=0.46 MA/m,(BH)max=286.5 KJ/m3。實驗結果還表明,氧在合金中起著有害作用,為了獲得優異的磁性能,含氧量必須被控制在0.8%以下。

     

    Abstract: In order to reduce the Production cost for making Nd-Fe-B magnets, which has record magnetic Properties, a new production technology, reduction-diffusion process, was studied.In which Nd2O3 is used as start ing material to work out Nd-Fe-B permanent magnets directly.
    The effecte of the contents of Nd, as basic constituent, and Al, Co, as substitute constituents, and some technologic factors on permanent magnetic properties are studied.
    The practical permanent magnets of Nd-Fe-B and Nd-Fe-Co-B are made out.The optimum magnetic properties are Br=13.7 T,MHc=0. 46 MA/m, (BH)max=286.5 KJ/m3
    The experimental result shows that oxygen is harmful to magnet properties, so it must be controlled below 0.8%.

     

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