Effect of the soft/hard exchange interaction on natural resonance frequency and electromagnetic wave absorption of the rare earth–iron–boron compounds
Effect of the soft/hard exchange interaction on natural resonance frequency and electromagnetic wave absorption of the rare earth–iron–boron compounds
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DOI：
10.1016/j.jmmm.2004.04.105
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发表时间：
2004-10
影响因子：
2.7
通讯作者：
T. Maeda;S. Sugimoto;T. Kagotani;N. Tezuka;K. Inomata
中科院分区：
文献类型：
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作者：
T. Maeda;S. Sugimoto;T. Kagotani;N. Tezuka;K. Inomata
研究了硬磁Y2Fe14B与软磁Fe3B相的交换相互作用对材料自然共振现象和微波吸收性能的影响。采用熔融纺丝法制备了Y2Fe14B/Fe3B条带。在略高于晶化温度的退火和Cu的加入可以有效地改善Y2Fe14B和Fe3B相之间的交换作用。验证了反冲比与谐振频率位移之间的线性关系。在1003K下退火的y9.4 fe79.3 b1.1 cu0.2带状材料的反冲比最大，为0.49，其树脂复合材料的自然共振频率（fr）为44GHz，比Y2Fe14B树脂复合材料低23GHz。y9.4 fe79.3 b11 .1 cu0.2复合材料在39.5GHz波段具有良好的微波吸收性能（99%以上），吸波体厚度为0.38mm。
The effect of exchange interaction between the hard-magnetic Y2Fe14B and soft-magnetic Fe3B phases on the natural resonance phenomenon and microwave absorption properties was investigated. The Y2Fe14B/Fe3B ribbons were prepared by melt-spinning. The annealing at just above crystallization temperature of the ribbons and the Cu addition were effective to improve the exchange interaction between Y2Fe14B and Fe3B phases. A linear relationship between the recoil ratio and the shift of resonance frequency was confirmed. The Y9.4Fe79.3B11.1Cu0.2ribbon, annealed at 1003K, exhibited the largest recoil ratio of 0.49 and its resin composite showed the natural resonance frequency (fr) at 44GHz, which was 23GHz lower than that of the Y2Fe14B resin composite. The Y9.4Fe79.3B11.1Cu0.2composite also exhibited good microwave absorption properties (over 99%) at 39.5GHz with the absorber thickness of 0.38mm.