Absorption Electromagnetic Waves in X-Band Range Using Barium M-Hexaferrite Dopping Zn Ions and Polyaniline Conductive with Variation of Thickness Coating

Abstract:

Since the discovery of hexagonal ferrite or known as hexaferrites, research into the development of these materials related to commercial fields and technology has been very rapid. The use of hexaferite as a magnetic material that can be mass produced has a wide application field. Therefore, the magnetic properties of hexaferrites should be adjusted to meet these applications requirements. In this respect, cation substitution is one of the most effective ways to obtain a suitable material. Double layer coating design with variations in thickness of 1 mm, 2 mm, 3 mm, and 4 mm on Radar Absorbent Material (RAM), with Barium M-Hexaferrite (BaM) BaFe_12-xZn _xO₁₉ as magnetic material with variations in doping concentration of Zn²⁺ ions x = 0, 0.3 and 0.9 have been successfully synthesized by the solid state reaction method. Likewise with Polyaniline (PANi) with Dodecylbenzene Sulfonic Acid (DBSA) dopant as a conductive material, it have been successfully synthesized by the polymerization method. Radar absorbing materials (RAM) are characterized using X-Ray Diffraction (XRD), Four Point Probes (FPP), Fourier Transform Infrared (FTIR), Vector Network Analyzer (VNA), and Scanning Electron Microscope (SEM). The results of XRD characterization showed that the largest primary phase was obtained at BaM x= 0.9 which was 96.56%. The increassing of concentration dopping of Zn²⁺ ions to influence of decreasing the magnetic dipole of magnetic materials and the magnetic properties be come softmagnet materials. The variations in thickness coating radar absorbing materials the influence of absorption of electromagnetic waves occurs optimally, and the increase of thickness coating have coused the value of loss of reflection and widening of the absorption band of the X-Band range (8-12 GHz) increasing. The highest reflection loss and widening of the absorption band value is obtained from coating BaM x = 0.9 with a thickness of 4 mm, which are respectively - 16.29 dB, and 3.78 GHz. So that it can be concluded that the addition of the doping concentration of Zn²⁺ ions and the dimensions of the layer thickness can increase the absorption ability of RAM material.

• Periodical: Key Engineering Materials (Volume 860)
• Pages: 260-266
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.860.260
• Online since: August 2020
• Authors: Mochammad Zainuri*, Triwikantoro Triwikantoro, Dimas Ayu Primadani
• Keywords: Barium M-Hexaferrite, Conductive Polyaniline, Radar Absorbing Materials (RAM), Reflection Loss

References

[1] A. Ghasemi, A. Hossienpour, A. Morisako, A. Saatchi, M. Salehi, Electromagnetic properties and microwave absorbing characteristics of doped barium hexaferrite, J. Magn. Magn. Mater. 302 (2006) 429–435.

DOI: 10.1016/j.jmmm.2005.10.006

[2] E. Acikalin, K. Coban, A. Sayinti, Nanosized hybrid electromagnetic wave absorbing coatings, Prog. Org. Coat. 98 (2016) 2–5.

[3] A. Aror, S. B. Narang, K. Pubby, Effect of thickness on microwave absorptive behavior of La-Na doped Co-Zr barium hexaferrites in 18.0–26.5 GHz band, J. Magn. Magn. Mater. 423 (2017) 441–446.

DOI: 10.1016/j.jmmm.2016.09.126

[4] S. Palaniappan, A. John, Polyaniline materials by emulsion polymerization pathway, Prog. in Polym. Sci. 33 (2008) 732-758.

DOI: 10.1016/j.progpolymsci.2008.02.002

[5] X. Wang, J. Heberlein, E. Pfender, W. Gerberich, Effect of nozzle configuration, gas pressure, and gas type on coating properties in wire arc spray, J. Therm. Spray. Tech. 8 (1999) 565–575.

DOI: 10.1361/105996399770350269

[6] M. Zainuri, L. Amalia, The microstructure analysis of barium m-hexaferrite particles coated by PANI conducting material with in situ polymerization process, IOP Conf. Ser. Mater. Sci. Eng. 196 (2017) 012015.

DOI: 10.1088/1757-899x/196/1/012015

[7] A.G. MacDiarmid, Synthetic metals: A novel role for organic polymers, Curr. Appl. Phys. 1 (2001) 269-279.

[8] M. Zainuri, D. Andriyani, Characterization of BaM and PaNi-based Radar Absorbency (RAM) behavior with multilayer geometry structure for x-band absorption, Mater. Sci. Forum 966 (2019) 54-59.

DOI: 10.4028/www.scientific.net/msf.966.54