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

• Published in: Journal of materials science Vol. 50; no. 3; pp. 1201 - 1213
• Main Authors: Durmus, Zehra, Durmus, Ali, Kavas, Huseyin
• Format: Journal Article
• Language: English
• Published: Boston Springer US 01-02-2015; Springer; Springer Nature B.V
• Subjects: Analysis; Barium; Barium hexaferrite; Characterization and Evaluation of Materials; Chemistry and Materials Science; Classical Mechanics; Crystallography and Scattering Methods; Diffraction; Fourier transforms; Frequency ranges; Graphene; Graphite; Infrared analysis; Infrared spectroscopy; Iron compounds; Magnetic properties; Materials Science; Microwave absorption; Nanocomposites; Nanoparticles; Nanosheets; Nanostructure; Original Paper; Oxides; Physical properties; Polymer Sciences; Raman spectroscopy; Reflection; Scanning electron microscopy; Sol-gel processes; Solid Mechanics; Spectrum analysis; Structural analysis; Thermogravimetric analysis; X-rays; CoFe2O4; Ferrite; Reflection Loss; Expanded Graphite; Graphene Sheet
• ISSN: 0022-2461; 1573-4803
• DOI: 10.1007/s10853-014-8676-3

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.