期刊
CARBON
卷 44, 期 3, 页码 423-427出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.carbon.2005.09.001
关键词
carbon composites; coating; magnetic properties
A new method to coat Fe nanoparticles with carbon by pyrolysis of acetylene is reported. The Fe nanoparticles were beforehand coated with silica layers by sol-gel combined hydrogen method. The antioxidation capability of Fe/SiO2 composites has enhanced greatly after coated with amorphous carbon shells. By the introduction of only 7.5 wt.% nonmagnetic silica and carbon, these composites have relatively high specific magnetization of 200.27 emu/g. The insulating amorphous silica and carbon shells prove effective to reduce the eddy current at high frequency. (C) 2005 Elsevier Ltd. All rights reserved.
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