Study of radar absorbing characteristics of polymer composites with ferrite fillers

The search for effective radio-absorbing materials is an urgent task in solving the problems of electromagnetic compatibility, electromagnetic pollution, as well as stealth and stealth technologies. We present the results of studying the electrophysical and radio-absorbing characteristics of ferrite-polymer composites depending on the structure and magnetic properties of the ferrite filler, as well as the dielectric properties of the polymer matrix. The radio absorbing characteristics of composites F-42/Mn-Zn-ferrite, F-42/Ni-Zn-ferrite, F-42/yttrium iron garnet, F-42/BaFe12O19, F2M/LiMnZn-spinel, PS525/Mn-Zn -ferrite, PVA/Mn-Zn ferrite, and PVA/Ni-Zn ferrite have been studied. Experimental data on the reflection coefficient, determined on a metal plate in a frequency range of 0.1 – 7 GHz showed that spinel ferrites and composites containing them are effective radio absorbing materials. Analysis of the spectra of complex dielectric and magnetic permeability revealed that composites with spinel ferrites and yttrium iron garnet are characterized by a dispersion of the magnetic permeability, which arises as a result of resonance processes of the motion of domain boundaries and natural ferromagnetic resonance. Moreover, the electrical properties of ferrites can affect the high-frequency spectra of the permittivity and permeability. It is shown that the use of electroactive polymers as matrices makes it possible to increase dielectric losses in the high-frequency range and obtain the maximum attenuation of electromagnetic radiation within 25 – 40 dB with a width of 10 dB up to 2.5 GHz in 2 – 7 GHz range. The results obtained can be used in further study of the functional properties of radio-absorbing materials in the high-frequency range.

[1]  S. B. Narang,et al.  Nickel Spinel Ferrites: A review , 2021 .

[2]  Chun H. Wang,et al.  Multifunctional magneto-polymer matrix composites for electromagnetic interference suppression, sensors and actuators , 2021 .

[3]  D. Kumar,et al.  Current trends in spinel based modified polymer composite materials for electromagnetic shielding , 2020 .

[4]  D. S. Klygach,et al.  Microwave properties of aluminum-substituted barium hexaferrite BaFe12-xAlxO19 ceramics in the frequency range of 32–50 GHz , 2020 .

[5]  Xiaobo Chen,et al.  Recent progress of nanomaterials for microwave absorption , 2019 .

[6]  T. Haritha,et al.  Polymer based MWCNT/Nickel Zinc Ferritenanocomposites for RAS application with simulation , 2019, Materials Today: Proceedings.

[7]  K. Ramji,et al.  Complex permittivity, permeability and microwave absorbing properties of PANI coated MWCNTs/ Manganese Zinc ferrite nanocomposite , 2019, Materials Today: Proceedings.

[8]  Z. A. Raza,et al.  Polyvinyl alcohol: A review of research status and use of polyvinyl alcohol based nanocomposites , 2018 .

[9]  Adnan Malki,et al.  Comparative study of microwave absorption characteristics of (Polyaniline/NiZn ferrite) nanocomposites with different ferrite percentages , 2018, Materials Chemistry and Physics.

[10]  Peijiang Liu,et al.  Fabrication and microwave absorption of reduced graphene oxide/Ni0.4Zn0.4Co0.2Fe2O4 nanocomposites , 2016 .

[11]  L. Deng,et al.  Eddy current effect on the microwave permeability of Fe-based nanocrystalline flakes with different sizes , 2014 .

[12]  Jenn–Ming Wu,et al.  Effect of Ni fillers on microwave absorption and effective permeability of NiCuZn ferrite/Ni/polymer functional composites , 2013 .

[13]  R. Pullar.  Hexagonal ferrites: A review of the synthesis, properties and applications of hexaferrite ceramics , 2012 .

[14]  M. C. Rezende,et al.  Dependence of microwave absorption properties on ferrite volume fraction in MnZn ferrite/rubber radar absorbing materials , 2011, 1105.5969.

[15]  W. Sun,et al.  Three-layer microwave absorber using cement-based composites , 2011 .

[16]  K. Rozanov,et al.  High-frequency behavior of magnetic composites , 2009 .

[17]  P. Sáha,et al.  Enhancement of magnetic losses in hybrid polymer composites with MnZn-ferrite and conductive fillers , 2007 .

[18]  T. C. Goel,et al.  Complex permittivity, complex permeability and microwave absorption properties of ferrite–polymer composites , 2007 .

[19]  N. K. Agrawal,et al.  Characterization of M-type barium hexagonal ferrite-based wide band microwave absorber , 2004 .

[20]  Takanori Tsutaoka,et al.  Frequency dispersion of complex permeability in Mn–Zn and Ni–Zn spinel ferrites and their composite materials , 2003 .

[21]  Anthony J. Bur,et al.  Dielectric properties of polymers at microwave frequencies: a review , 1985 .