高性能Sm2Fe17N x 粉体制备的研究进展
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何颖, 李超群, 陈小立, 龙芝梅, 赖嘉琪, 邵斌, 马毅龙, 陈登明, 董季玲
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Recent Development for Preparation Processes of Sm2Fe17N x Powders with High Magnetic Properties
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HE Ying, LI Chaoqun, CHEN Xiaoli, LONG Zhimei, LAI Jiaqi, SHAO Bin, MA Yilong, CHEN Dengming, DONG Jiling
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表2 用不同方法制备Sm2Fe17N x 的氮化条件和性能
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Table 2 Sm2Fe17N x prepared by different preparation process: nitriding conditions, physical and magnetic properties
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| Preparation method | Nitridation | Morphology | Impurity | Properties | Reference |
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Temperature /K | Time /h | Atmosphere | Length /μm | Ms /emu·g-1 | Mr /emu·g-1 | Hcj /kOe |
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| Jet-milling technique | / | / | / | 1.30 | / | 163 | 147 | 12.7 | [39] | | Strip casting technique | 700~800 | 10~24 | N2 | 0.80 | α-Fe | 160 | 155 | 13.0 | [44] | | Strip casting technique | 693 | 35 | N2 | 0.76 | / | 14.2 (kGs) | 12.5 (kGs) | 13.0 | [45] | Reduction-diffusion process (Polymerized complex) | 703 | 10 | N2 | 0.69 | / | / | / | 23.2 | [27] | Reduction-diffusion process (Co-precipitation) | 693 | / | NH3/H2 (1:2 Vol/Vol) | 0.90 | / | 125 | 90 | 28.1 | [11] | Reduction-diffusion process (Hydrothermal) | 693 | 1 | NH3/H2 (1:2 Vol/Vol) | 0.66 | / | 140 | 105 | 24.1 | [53] | Reduction-diffusion process (Thermal decomposition) | 873 | / | Melamine (C3H6N6) | 0.10 | / | 128 | / | 15.4 | [55] |
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