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机械化学及其在稀土永磁材料中的应用

Mechanochemical reaction and its applications in the synthesis of rare earth permanent magnets
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摘要 介绍了机械化学的定义、发展历史、特点、机理和应用,重点介绍了近期发现的稀土过渡族合金在正庚烷中球磨的过程中,正庚烷分解产生氢气和碳,以及氢气与稀土过渡族合金发生歧化反应生成稀土氢化物2个机械化学过程.通过这2种机械化学过程和随后的真空热处理技术,获得了具有较好永磁性的SmCo 5,Nd-Fe-C和Sm-Fe-C永磁材料. The definition,development history,characters,mechanism and applications of mechanochemical reaction had been introduced.More attention had been paid on the recently found decomposition of heptane to H 2 and C when the rare earth-transition alloys had been ball milled in heptane and the formation of rare earth hydrides.Through these two mechanochemical processes and the succedent annealing,SmCo 5,Nd-Fe-C and Sm-Fe-C permanent magnetic materials with better magnetic properties had been obtained.
作者 王敬雪 涂浩然 闫羽 苏峰 杜晓波 WANG Jing-xue;TU Hao-ran;YAN Yu;SU Feng;DU Xiao-bo(College of Physics,Jilin University,Changchun 130012,China)
出处 《物理实验》 2020年第2期1-6,26,共7页 Physics Experimentation
关键词 稀土永磁 机械化学 高能球磨 正庚烷分解 歧化 rare earth permanent magnet mechanochemical reaction high energy ball milling decomposition of heptane disproportionation
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