Enhanced microwave absorption properties of Fe3O4-modified flaky FeSiAl
Enhanced microwave absorption properties of Fe3O4-modified flaky FeSiAl
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DOI：
10.1016/j.jmmm.2017.07.097
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发表时间：
2017-12-15
影响因子：
2.7
通讯作者：
Huang, Shengxiang
中科院分区：
文献类型：
--
作者：
He, Jun;Deng, Lianwen;Huang, Shengxiang
采用化学共沉淀法制备了磁绝缘体Fe3O4改性片状Fe85Si9.5Al5.5（FeSiAl）粉末，其在2-8 GHz频率范围内的电磁波吸收性能显着增强。 X 射线衍射 (XRD) 和扫描电子显微镜 (SEM) 证实了在片状 FeSiAl 上沉淀形成了纳米颗粒 Fe3O4。修改后的薄片的电磁测量呈现出在 2-8 GHz 范围内几乎不变的复磁导率和降低的复介电常数，以及改进的阻抗匹配性能。更重要的是，厚度为1.5 mm的改性样品实现了5.36 GHz带宽（RL < -10 dB）的优异吸波性能，是一种很有前景的2-8 GHz吸波材料。 (C) 2017 年由 Elsevier B.V. 出版
The magnetic insulator Fe3O4-modified flaky Fe85Si9.5Al5.5 (FeSiAl) powders with significantly enhanced electromagnetic wave absorption properties in the frequency range of 2-8 GHz were prepared by chemical co-precipitation. X-ray diffraction (XRD) and scanning electron microscopy (SEM) have confirmed the formation of nanoparticles Fe3O4 precipitated on the flake-shaped FeSiAl. The electromagnetic measurements of the modified flakes presents a nearly invariable complex permeability and decreased complex permittivity in the 2-8 GHz, as well as improved impedance matching performance. More importantly, an excellent microwave absorbing performance with the bandwidth (RL < -10 dB) of 5.36 GHz is achieved in modified sample with the thickness of 1.5 mm, which is a promising microwave absorbing material in 2-8 GHz. (C) 2017 Published by Elsevier B.V.