Preparation and microwave absorption properties of loose nanoscale Fe3O4 spheres
Preparation and microwave absorption properties of loose nanoscale Fe3O4 spheres
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松散纳米Fe3O4球的制备及其微波吸收性能
DOI：
10.1016/j.jmmm.2010.02.003
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发表时间：
2010-08-01
影响因子：
2.7
通讯作者：
Liu, Xiaobo
中科院分区：
文献类型：
--
作者：
Jia, Kun;Zhao, Rui;Liu, Xiaobo
研究发现，在聚乙烯和少量聚乙烯亚胺存在下，磁铁矿纳米粒子在乙二醇中组装成随机分散的松散纳米级球体，直径类似于 300 nm。采用现代分析方法提供磁性松散球体的结构信息。铁磁饱和磁化强度约为80.0 emu g(-1)，矫顽力为209 Oe。微波电磁参数由矢量网络分析仪测量。与传统的 Fe3O4 纳米粒子相比，合成的松散球体表现出新颖的微波特性。 Ku 波段出现了一个额外的微波损耗峰，这是由于松散结构造成的。 Crown 版权所有 (C) 2010 由 Elsevier B.V. 出版。保留所有权利。
Magnetite nanoparticles are found to assemble into randomly dispersed loose nanoscale spheres with diameters similar to 300 nm in ethylene glycol in the presence of polyethylene and a small quantity of polyethyleneimine. Modernanalysismethodsareemployedtoprovidestructureinformationofthe magnetic loose spheres. The ferromagnetic saturation magnetization is similar to 80.0 emu g(-1), and the coercive force is 209 Oe. The microwave electromagnetic parameters are measured by a vector network analyzer. The synthesized loose spheres exhibit novel microwave properties compared with the conventional Fe3O4 nanoparticles. An additional microwave loss peak appears in the Ku band, which is attributed to the loose structure. Crown Copyright (C) 2010 Published by Elsevier B.V. All rights reserved.