Electromagnetic parameters and microwave-absorption properties for the mixtures of mechanically milled spherical and flaky carbonyl iron powders

金属学报(英文版), 2012, 25(3): 201-206.

^1, , ^2, , ^3, , ^4,

1.State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan 430070, China

2.State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan 430070, China

3.State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan 430070, China

4.State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan 430070, China

基金项目: New Century Excellent Talents(NCET-05-0660) University Industry Cooperation project([2011] 362) from the Ministry of Education,China Postdoctoral Science Fund(20100480886) This work described here was financially supported by National High Technical Research and Development Program of China(2006AA03A209) from Guangdong Province and Fundamental Research Funds for the Central Universities(2011-IV-059)

Electromagnetic parameters and microwave-absorption properties for the mixtures of mechanically milled spherical and flaky carbonyl iron powders

Jinghua HE ^1, , Wei WANG ^2, , Aimin WANG ^3, , Jianguo GUAN ^4,

1.State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan 430070, China

2.State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan 430070, China

3.State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan 430070, China

4.State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan 430070, China

Keywords： Carbonyl iron

The electromagnetic parameters were measured for the mixtures of mechanical milled carbonyl iron powders (CIPs) with different mass ratios of spheroid-like particles to flake-shape particles.The results indicate that mixing the sphere-like CIP particles with flake-shaped CIPs can be used to adjust effectively the electromagnetic parameters and enhance the absorption property in high frequency.In addition,a theoretic simulation based on the principle of superposition was carried out and compared with the microwave measurement results,indicating that the simple principle of superposition can not reflect truly the internal interaction mechanism in the composites with different particle shapes.

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Electromagnetic parameters and microwave-absorption properties for the mixtures of mechanically milled spherical and flaky carbonyl iron powders

参考文献