Synthesis and characterization of structural and magnetic properties of graphene/hard ferrite nanocomposites as microwave-absorbing material


Durmus Z., Durmus A., Kavas H.

JOURNAL OF MATERIALS SCIENCE, cilt.50, ss.1201-1213, 2015 (SCI İndekslerine Giren Dergi)

  • Cilt numarası: 50 Konu: 3
  • Basım Tarihi: 2015
  • Doi Numarası: 10.1007/s10853-014-8676-3
  • Dergi Adı: JOURNAL OF MATERIALS SCIENCE
  • Sayfa Sayısı: ss.1201-1213

Özet

In this study, barium hexaferrite nanoparticles were synthesized via the citrate sol-gel combustion method in a reaction medium consisting of various forms of graphene nanosheet, such as expanded graphite, expanded graphite oxide, and reduced graphite oxide to prepare novel type graphene/hexaferrite nanocomposites as microwave-absorbing material. The microstructural features and physical properties of nanocomposites were characterized by X-ray diffraction, Raman spectroscopy, Fourier transform infrared spectroscopy, scanning electron microscopy, and thermogravimetric analysis methods. Magnetic properties of the nanocomposites were studied by a vibrating sample magnetometer, and the microwave-absorption and -reflection properties of samples were also determined in the frequency range of 8-12 GHz. It was found that the surfaces of the graphene nanosheets were successfully decorated with the barium hexaferrite nanoparticles, and the resulting layered nanocomposite structure showed the reflection loss value of -58 dB at 11.42 GHz.