Synthesis of Fe/SiO2 composite particles and their superior electromagnetic properties in microwave band
Synthesis of Fe/SiO2 composite particles and their superior electromagnetic properties in microwave band
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DOI：
10.1016/j.matlet.2009.10.005
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发表时间：
2010-01
影响因子：
3
通讯作者：
X. J. Wei;Jiantang Jiang;L. Zhen;Y. Gong;W. Shao;Chengyan Xu
中科院分区：
文献类型：
--
作者：
X. J. Wei;Jiantang Jiang;L. Zhen;Y. Gong;W. Shao;Chengyan Xu
采用溶胶-凝胶法制备Fe2O3/ sio2前驱体，采用氢还原法制备Fe/ sio2复合颗粒。要使fe2o3完全转化为Fe，需要高于600℃的还原温度。Fe/ sio2复合粒子在微波波段表现出优越的复介电常数和磁导率。在厚度约为2mm的Fe/ sio2基涂层中，可以同时获得高于- 70dB的反射损耗和较宽的吸收带，这表明Fe/ sio2复合颗粒是一种很有前途的高性能电磁吸收材料。
Fe/SiO2composite particles were synthesized by hydrogen reduction of Fe2O3/SiO2precursor, which was prepared by sol–gel method. A reduction temperature higher than 600°C is required for the complete conversion of Fe2O3to Fe. Fe/SiO2composite particles exhibit superior complex permittivity and permeability in the microwave band. A reflection loss higher than −70dB as well as a broad absorption band can be simultaneously obtained for Fe/SiO2-based coatings about 2mm in thickness, suggesting that the Fe/SiO2composite particles are a promising candidate for high performance electromagnetic absorption materials.