Fabrication and Electromagnetic Absorbing Properties of Hexagonal Ferrites

Year 2021, , 1 - 6, 31.01.2021

Harun Bayrakdar

https://doi.org/10.29130/dubited.818564

Abstract

Nanocomposite materials were obtained by synthesizing Ba2Bi2Co2Fe12O22 Nano Particles with polyaniline and polyacrylonitrile polymers. Composites in this nanostructure; structural, magnetic and electromagnetic absorption properties were examined. It was observed from the x-ray analysis that the nano-structured particles had crystalline structure and shown Y-type hexagonal structure. It can be also seen from the IR measurements that it has this structure at 878 and 650 cm−1. The Electron Spin Resonance experiment of nanoparticles have been measured at room temperature and shown quite wide spectra and splitting factor. Vibration Sample Magnetometer measurements were made at 10-50 and room temperature. It can be said that nanoparticles useable so successful the magnetic recording media, applications of microwave technologies. Electromagnetic absorption experiments were measured approximately 5-20 GHz in the frequency band by used the free space method. These electromagnetic absorbers are using for 1,5 mm. thickness of the samples obtained 6 GHz. wide -50 db. loss of reflection was measured.

Keywords

Hexagonal, Magnetic, Absorbing

Thanks

Thank you to Uğur Cengiz for us help.

Hegzagonal Ferritlerin İmalatı ve Elektromanyetik Soğurma Özelliklerinin İncelenmesi

Abstract

Nanokompozit malzemeler, Ba2Bi2Co2Fe12O22 Nano Partiküllerin polianilin ve poliakrilonitril polimerler ile sentezlenmesi ile elde edilmiştir. Bu nanoyapıdaki kompozitler; yapısal, manyetik ve elektromanyetik soğurma özellikleri incelenmiştir. X-ışını analizinden nano yapılı partiküllerin kristal yapıya sahip olduğu ve Y tipi altıgen yapı gösterdiği görülmüştür. 878 ve 650 cm-1'de bu yapıya sahip olduğu IR ölçümlerinden de görülebilmektedir. Nanopartiküllerin Elektron Spin Rezonans deneyi oda sıcaklığında ölçülmüş ve oldukça geniş spektrum ve bölünme faktörü gösterilmiştir. Titreşim Örneği Manyetometre ölçümleri 10-50 ve oda sıcaklığında yapılmıştır. Nanopartiküllerin, manyetik kayıt medyası, mikrodalga teknolojilerinin uygulamaları kadar başarılı olduğu söylenebilir. Elektromanyetik absorpsiyon deneyleri, frekans bandında serbest alan yöntemi kullanılarak yaklaşık 5-20 GHz ölçülmüştür. 1,5 mm. kalınlığındaki elektromanyetik soğurucu numuneler için 6 GHz. genişliğinde ve 50 db. yansıma kaybı ölçülmüştür.

Keywords

Manyetik, Hegzagonal, Soğurma

References

• [1] E.W, Gorter, “Saturation magnetization and crystal chemistry of ferrimagnetic oxides,” Philips Res. Repts., vol. 9, pp. 295-355, 1954.
• [2] M.S. Selim, G. Turky ; Shouman M.A.; El-Shobaky G.A, “Effect of Li2O doping on electrical properties of CoFe2O4,” Solid State Ionics, vol. 120, pp. 173-181, 1999.
• [3] G.A. Ozin,” Nanochemistry: Synthesis in diminishing dimensions,” Adv. Mater., vol. 4, pp. 612, 1992.
• [4] H. Gleiter, “Nanostructured Materials,” Adv. Mater., vol. 4, pp. 474, 1992.
• [5] J. Wang, Q. W. Chen, C. Zeng, B. Hou, “Magnetic‐Field‐Induced Growth of Single‐Crystalline Fe3O4 Nanowires,” Adv. Mater., vol. 16, pp. 137, 2004.
• [6] RC. Pullar, “Hexagonal ferrites: a review of the synthesis, properties and applications of hexaferrite ceramics,” Progress in Materials Science, vol. 57 no. 7, pp. 1191-1334, 2012.
• [7] M. R. Meshram, N. K. Agrawal, B. Sinha, P.S. Misra,” Characterization of M-type barium hexagonal ferrite-based wide band microwave absorber,” Journal of Magnetism and Magnetic Materials, vol. 271, pp. 207–214, 2004.
• [8] H. Bayrakdar, “Fabrication, magnetic and microwave absorbing properties of Ba2Co2Cr2Fe12O22 hexagonal ferrites” J. Alloys and Compounds, vol. 674, pp. 185-188, 2016.
• [9] J. J. Temuujin, M. Aooyama, M. Senna, T. Masuko, C. Ando, H. Kishi, “Structural properties of cobalt substituted barium hexaferrite nanoparticles prepared by a thermal treatment method” J. Solid State Chem., vol. 177, pp. 221, 2004.
• [10] C.C. Chauhan, R.B. Jotania, K.R. Jotania, “Structural properties of cobalt substituted barium hexaferrite nanoparticles prepared by a thermal treatment method,” Nanosystems: Physics, Chemistry, Mathematics, vol. 4, no. 3, pp. 363–369, 2013.
• [11] H. Bayrakdar, “Electromagnetic Propagation and Absorbing Property of Ferrite-Polymer Nanocomposite Structure,” PIER M., vol. 25, pp. 269, 2012.