Electromagnetic and microwave absorbing properties of FeCoB powder composites  

作　　者：Shen-Gen Zhang Hang-Xin Zhu Jian-Jun Tian De-An Pan Bo Liu Yan-Tao Kang 

机构地区：[1]Advanced Material and Technology Institute, University of Science and Technology Beijing

出　　处：《Rare Metals》2013年第4期402-407,共6页稀有金属（英文版）

基　　金：financially supported by the National Hi-tech R&D Project Supporting Programs Funded by Ministry of Science&Technology of China(No.2012AA063202);the National Natural Science Foundation of China(Nos.50972013,50802008,and 51004011);the National Key Project of Scientific and Technical Supporting Programs Funded by Ministry of Science&Technology of China(Nos.2012BAC02B01,2012BAC12B05,2011BAE13B07,and 2011BAC10B02);the Guangdong Province&Ministry of Education Industry-Study-Research United Project(No.2009A090100017)

摘　　要：The electromagnetic and microwave absorbing properties of FeCoB powder composites prepared by sin- gle-roller melt-spinning and mechanical milling processes were investigated in this paper. The result indicates that the flake-like powders are obtained. As milling time increases, the flake-like powder particles tend to agglomerate, causing the flake-like powders decrease gradually. The milling time plays an important role in the electromagnetic parameters which relates to the shape and size of the powder particles. The calculation shows that the sample milled for 6 h could achieve an optimal reflection loss of -11.5 dB at 5.8 GHz, with mass fraction of 83 % and a matching thickness of 1.8 mm. The result also indicates that the microwave absorbing properties of the FeCoB powder composites are adjustable by changing their thickness, and can be applied as a thinner microwave absorbing material in the range of 2-8 GHz.The electromagnetic and microwave absorbing properties of FeCoB powder composites prepared by sin- gle-roller melt-spinning and mechanical milling processes were investigated in this paper. The result indicates that the flake-like powders are obtained. As milling time increases, the flake-like powder particles tend to agglomerate, causing the flake-like powders decrease gradually. The milling time plays an important role in the electromagnetic parameters which relates to the shape and size of the powder particles. The calculation shows that the sample milled for 6 h could achieve an optimal reflection loss of -11.5 dB at 5.8 GHz, with mass fraction of 83 % and a matching thickness of 1.8 mm. The result also indicates that the microwave absorbing properties of the FeCoB powder composites are adjustable by changing their thickness, and can be applied as a thinner microwave absorbing material in the range of 2-8 GHz.

关 键 词：Fe48Co48B4 powder composites Mechanical milling Electromagnetic parameters Microwave absorbing properties 

分 类 号：TB383.3[一般工业技术—材料科学与工程] TB33