Electromagnetic and microwave absorbing properties of the composites containing flaky FeSiAl powders mixed with MnO 2 in 1-18 GHz

Abstract The flaky FeSiAl/ irregular shaped MnO 2 composite with the different mass ratios were prepared by using a two-roll mixer and a vulcanizing machine. The morphologies of the composite absorbers were characterized by a scanning electron microscope. The microwave electromagnetic properties of the composites were measured using a vector network analyzer in the range of 1–18 GHz. The effect of the mass ratio of FeSiAl/MnO 2 on the microwave loss properties of the composites was investigated. The results show that the reflection loss (RL) values exceeding −20 dB from 3.5 to 16.5 GHz can be obtained for the flaky FeSiAl/MnO 2 mass ratio of 1:1 from 1.5 mm to 5 mm. In addition, the FeSiAl/MnO 2 composite with the FeSiAl/MnO 2 mass ratio of 7:3 has −10 dB bandwidth of 6.6 GHz (from 11.4–18 GHz) with a thickness of 1.5 mm. It is found that the flaky FeSiAl/MnO 2 composites can be potential microwave absorption materials.

[1]  T. Zhou,et al.  Influence of Cr content on structure and magnetic properties of Fe–Si–Al–Cr powders , 2010 .

[2]  Z. Zhang,et al.  Absorption properties of carbon black/silicon carbide microwave absorbers , 2011 .

[3]  Jin-Bong Kim,et al.  Comparison study on the effect of carbon nano materials for single-layer microwave absorbers in X-band , 2008 .

[4]  D. Liang,et al.  Structure and electromagnetic characteristics of flaky FeSiAl powders made by melt-quenching , 2009 .

[5]  T. Qiu,et al.  Effect of ball milling and moderate surface oxidization on the microwave absorption properties of FeSiAl composites , 2013 .

[6]  C. Lou,et al.  Electromagnetic and microwave absorption properties of magnetic stainless steel powder in 2–18 GHz , 2012 .

[7]  Jianjun Jiang,et al.  Electromagnetic and microwave absorption properties of surface modified Fe–Si–Al flakes with nylon , 2012 .

[8]  Deyuan Zhang,et al.  Microwave Absorption and Shielding Property of Composites with FeSiAl and Carbonous Materials as Filler , 2012 .

[9]  Masahiro Itoh,et al.  Electromagnetic wave absorption properties of α-Fe/Fe3B/Y2O3 nanocomposites in gigahertz range , 2003 .

[10]  Jianhua Zhou,et al.  Design of mesostructured γ-Fe2O3/carbon nanocomposites for electromagnetic wave absorption applications , 2011 .

[11]  Hong Bi,et al.  Enhanced microwave absorption properties of the milled flake-shaped FeSiAl/graphite composites , 2013 .

[12]  L. Zhen,et al.  Synthesis of CoFe/Al2O3 composite nanoparticles as the impedance matching layer of wideband multilayer absorber , 2011 .

[13]  Shunhua Liu,et al.  Electromagnetic characteristics of nanometer manganese dioxide composite materials , 2006 .

[14]  L. Deng,et al.  Effect of attrition time on the microwave permeability of magnetic Fe-Si-Al flakes , 2012 .

[15]  Huolin Huang,et al.  Microstructure and microwave absorption properties of carbon-coated iron nanocapsules , 2007 .

[16]  Xian Wang,et al.  Effects of aspect ratio and particle size on the microwave properties of Fe-Cr-Si-Al alloy flakes , 2007 .

[17]  Y. Zhao,et al.  Application of manganese dioxide to electromagnetic wave absorber: effective permittivity and absorbing property , 2006 .

[18]  J. L. Snoek.  Dispersion and absorption in magnetic ferrites at frequencies above one Mc/s , 1948 .

[19]  Wuqiang Zhang,et al.  Electromagnetic and microwave absorption properties of carbonyl iron/MnO2 composite , 2014 .

[20]  Chunyi Zhi,et al.  Fabrication and microwave absorption of carbon nanotubes/CoFe2O4 spinel nanocomposite , 2006 .

[21]  Yang Liu,et al.  Microwave absorption properties of the carbon-coated nickel nanocapsules , 2006 .

[22]  D. Liang,et al.  Electron Structure and Microwave Absorbing Ability of Flaky FeSiAl Powders , 2011 .

[23]  W. Gong,et al.  Electromagnetic properties of Fe-Si-Al/BaTiO3/Nd2Fe14B particulate composites at microwave frequencies , 2014 .