Magnetic and electromagnetic wave absorption properties of α-Fe/Z-type Ba-ferrite nanocomposites
Magnetic and electromagnetic wave absorption properties of α-Fe/Z-type Ba-ferrite nanocomposites
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DOI：
10.1063/1.2170402
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发表时间：
2006-02-06
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
Ba3Co1.8Fe23.6Cr0.6O41粉末与α - fe机械合金化制备的α - fe /Ba3Co1.8Fe23.6Cr0.6O41纳米复合材料的饱和磁化值（M-s）随着α - fe浓度的增加而增加。由于形状各向异性和交换偏置的影响，α - fe /Ba3Co1.8Fe23.6Cr0.6O41纳米复合材料的矫顽力值高于α - fe和Ba3Co1.8Fe23.6Cr0.6O41。采用33.5 vol % α - fe /Ba3Co1.8Fe23.6Cr0.6O41（38、70、85 vol % α - fe）粉末制备的树脂复合材料在吸收厚度分别为1.3 ~ 2.5、1.6 ~ 3.0和1.7 ~ 3.2 mm的情况下，在7.5 ~ 16.0、5.4 ~ 10.5和4.3 ~ 8.3 GHz范围内具有良好的电磁波吸收性能。(c) 2006年美国物理研究所。
The saturation magnetization values (M-s) of alpha-Fe/Ba3Co1.8Fe23.6Cr0.6O41 nanocomposites prepared by mechanically alloying alpha-Fe with Ba3Co1.8Fe23.6Cr0.6O41 powders increased with increasing the concentration of alpha-Fe. alpha-Fe/Ba3Co1.8Fe23.6Cr0.6O41 nanocomposites showed higher coercivity values than alpha-Fe and Ba3Co1.8Fe23.6Cr0.6O41 because of the effects of shape anisotropy and exchange bias. The resin compacts with 33.5 vol % alpha-Fe/Ba3Co1.8Fe23.6Cr0.6O41 (38, 70, 85 vol % alpha-Fe) powders provided good electromagnetic wave absorption performances in ranges of 7.5-16.0, 5.4-10.5, and 4.3-8.3 GHz over the absorber thicknesses of 1.3-2.5, 1.6-3.0, and 1.7-3.2 mm, respectively. (c) 2006 American Institute of Physics.