Composite magnetic materials based on nanocrystalline powders for high-frequency applications

Composite magnetic materials based on nanocrystalline powders for high-frequency applications
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用于高频应用的基于纳米晶粉末的复合磁性材料

DOI:
10.1016/j.jmmm.2006.11.023
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发表时间:
2007-03
影响因子:
2.7
通讯作者:
Qin, Hongwei
Qin, Hongwei
中科院分区:
材料科学3区
文献类型:
--
作者:
Li, Bo;Jiang, Minhua;Hu, Jifan;Qin, Hongwei

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将快淬态纳米晶薄带Fe-Cu-Nb-Si-B和Fe-Zr-B-Cu的球磨粉末与环氧树脂混合压制成复合型芯。环氧树脂含量为5wt%的Fe_(72)Cu_(2.5)Nb_(3Si)_(13.5)B_9粉芯在24 MPa下压制时,在1 MHz下的真实的磁导率为30.9,在49 MPa下压制时,在1 MHz下的磁导率为33.0。由淬态纳米晶薄带制备的粉末磁芯在较宽的频率范围内表现出平坦的磁导率。提高压实压力可以诱导渗透率谱从共振向弛豫的转变。
The composite cores were prepared by compacting milled powders of as-quenched nanocrystalline ribbons Fe–Cu–Nb–Si–B and Fe–Zr–B–Cu with epoxy resin. The real permeability at 1MHz of Fe72Cu2.5Nb3Si13.5B9powder core with 5wt% epoxy resin is 30.9 when compacting under 24MPa, and is 33.0 when compacting under 49MPa. The powder cores prepared from as-quenched nanocrystalline ribbons show a flat permeability in a wide frequency range. The transition of permeability spectra from resonance to relaxation can be induced by enhancing the compacting pressure.
DOI: 10.1063/1.342149
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