Electromagnetic wave absorption properties of α-Fe/Fe3B/Y2O3 nanocomposites in gigahertz range
Electromagnetic wave absorption properties of α-Fe/Fe3B/Y2O3 nanocomposites in gigahertz range
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DOI：
10.1063/1.1623934
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发表时间：
2003-11-10
影响因子：
4
通讯作者：
Machida, K
中科院分区：
文献类型：
--
作者：
Liu, JR;Itoh, M;Machida, K
采用熔纺技术制备了α-Fe/Fe3B/Y2O3纳米复合材料，并在0.05-20.05 GHz范围内测量了其电磁波吸收性能。与α-Fe/Y2O3复合材料相比，由于四方Fe3B具有较大的各向异性场（H-A）（类似于0.4 MA/m），α-Fe/Fe3B/Y2O3的共振频率（f（r））移动到更高的频率范围。相对介电常数（epsilon(r)=epsilon(r)(')-jepsilon(r)(")）在0.5-10 GHz范围内始终保持较低水平，这表明复合粉末具有较高的电阻率（rho=接近100 Omega m）。有效电磁波吸收（反射损耗）
Nanocomposites alpha-Fe/Fe3B/Y2O3 were prepared by a melt-spun technique, and the electromagnetic wave absorption properties were measured in the 0.05-20.05 GHz range. Compared with alpha-Fe/Y2O3 composites, the resonance frequency (f(r)) of alpha-Fe/Fe3B/Y2O3 shifted to a higher frequency range due to the large anisotropy field (H-A) of tetragonal Fe3B (similar to0.4 MA/m). The relative permittivity (epsilon(r)=epsilon(r)(')-jepsilon(r)(")) was constantly low over the 0.5-10 GHz region, which indicates that the composite powders have a high resistivity (rho=similar to100 Omega m). The effective electromagnetic wave absorption (reflection loss