HDDR各向异性NdFeB磁粉的工艺、应用与产业化  

Preparation Technology,Application and Industrialization of HDDR Anisotropic NdFeB Magnetic Powders

作　　者：刘冬 张鹏杰 孙威 马斌 李青华 刘颖力[3] 鲜聪 马嵩[5] Liu Dong;Zhang Pengje;Sun Wei;Ma Bin;Li Qinghua;Liu Yingli;Xian Cong;Ma Song(BGRIMM Magnetic Materials&Technology Co.Ltd,Beijing 102600,China;BGRIMM Magnetic Materials&Technology(Fuyang)Co.Lid,Fuyang 236000,China;School of Electronic Science and Engineering,University of Electronic Science and Technology of China,Chendu 611731,China;The 9th Research Institute of China Electronics Technology Group Corporation,Mianyang 621000,China;Shenyang National Laboratory for Materials Science,Institute of Metal Research,Chinese Academy of Sciences,Shenyang 110016,China)

机构地区：[1]北矿磁材科技有限公司,北京102600 [2]北矿磁材(阜阳)有限公司,安徽阜阳236000 [3]电子科技大学电子科学与工程学院,四川成都611731 [4]中国电子科技集团公司第九研究所,四川绵阳621000 [5]中国科学院金属研究所,辽宁沈阳110016

出　　处：《中国稀土学报》2024年第5期842-852,I0001,共12页Journal of the Chinese Society of Rare Earths

基　　金：国家重点研发计划“稀土新材料”重点专项项目(2022YFB3504800)资助。

摘　　要：氢化-歧化-脱氢-再复合(HDDR)工艺是制备各向异性NdFeB磁粉的最佳方法。HDDR各向异性NdFeB磁粉凭借其卓越的磁性能和性价比在粘结永磁材料领域的高端应用场景中逐步打开市场。此外,HDDR工艺技术在低重稀土高矫顽力烧结NdFeB磁体、热压NdFeB磁体、钐铁氮磁粉的制备以及烧结NdFeB废旧磁体的回收再利用等方面具有潜在的重要应用价值。因此,HDDR各向异性NdFeB磁粉及其相关技术引起了广泛关注,目前已成为稀土永磁行业的研究热点之一。HDDR各向异性NdFeB磁粉在日本早已成功量产和规模化应用,但在中国其产业化至今难言成功。回顾总结了近20年以来HDDR法各向异性NdFeB磁粉的制备工艺研究进展、各向异性形成机理、主要应用领域、产业化现状及存在的主要问题,并对其未来的发展趋势进行了展望。HDDR technology is the best way to prepare anisotropic Nd-Fe-B magnetic powders.HDDR anisotropic Nd-Fe-B magnetic powder gradually expands its market share in high-end application scenarios of bonded permanent magnet materials by virtue of its excellent magnetic properties and cost performance.In addition,HDDR technology has potential important application value in the preparation of low weight rare earth high coercivity sintered Nd-Fe-B magnets,hot pressed Nd-Fe-B magnets,Sm-Fe-N magnetic powders and recycling of sintered Nd-Fe-B waste magnets.Therefore,HDDR anisotropic NdFeB magnetic powders and related technologies have attracted wide attention,and have become one of the research hotspots in the rare earth permanent magnet industry.HDDR anisotropic NdFeB magnetic powders have been successful in mass production and large-scale application in Japan,but its industrialization has not been successful in China so far.In this paper,the technological process,anisotropy formation mechanism,main application fields and industrialization status of the preparation of anisotropic NdFeB magnetic powders by HDDR method in the past 20 years are summarized,and its future development trend is prospected.

关 键 词：HDDR 各向异性 ND-FE-B 晶界扩散 产业化 

分 类 号：TM273[一般工业技术—材料科学与工程]