Structural, magnetic properties and microwave absorbing behavior of iron based carbon nanocomposites
DOI:
https://doi.org/10.11113/mjfas.v12n1.365Keywords:
nanocomposite, α-Fe/C, magnetic, absorber, microwave.Abstract
Nanocomposite of α-Fe/C was successfully synthesized by mechanical milling method. Analytical-grade of α-Fe and graphite powders with a purity of greater than 99% were mixed. The mixture was milled for 50 hours at room temperature using High Energy Milling (HEM). The refinement results of X-ray diffraction pattern shows that the α-Fe/C nanocomposite consists of 20 wt% Fe and 80 wt% C. The mechanical milling resulted in α-Fe/C powders with mean particle size ~900 nm. The image reveals the morphology of particle and the particles that exist is aggregates of fine grains. The magnetic properties of the particle α-Fe/C nanocomposite showed low coercivity and high remanent magnetization. The α-Fe/C nanocomposite has certain microwave absorber properties in the frequency range of 9 – 15 GHz, with the maximum reflection loss reaches -10 dB at 12 GHz and the absorption range under −4 dB is from 11.2 to 15.5 GHz with 2 mm thickness. The study concluded that the α-Fe/C nanocomposite shows good candidate materials for microwave absorbing materials applications.
References
P.H.Zhou, , J.L.Xie, Y.Q. Liu, L.J.Deng, Composition dependence of microstructure, magnetic and microwave, properties in ball-milled FeSiB nanocrystalline flakes, Journal of Magnetism and Magnetic Materials, 320 (2008) 3390–3393.
Xian Wang, Rongzhou Gong, Hao Luo, Zekun Feng, Microwave properties of surface modified Fe–Co–Zr alloy flakes with mechanochemically synthesized polystyrene, Journal of Alloys and Compounds 480 (2009) 761–764.
Y Tang, Y Shao, K F Yao and Y X Zhong, Fabrication and microwave absorption properties of carboncoated cementite nanocapsules, Nanotechnology, 25 (2014) 035704 (5pp)
X. F. Zhang, X. L. Dong,a H. Huang, Y. Y. Liu, W. N. Wang, X. G. Zhu, B. Lv, and J. P. Lei, C. G. Lee, Microwave absorption properties of the carbon-coated nickel nanocapsules, Appl. Phys. Lett. 89, 053115, (2006).
S. Sugimoto et al., “GHz microwave absorption of a fine α-Fe structure produced by the disproportionation of Sm2Fe17 in hydrogen,” J. Alloys Compounds 330, 2002, pp. 301-306.
Jiu Rong Liu, Masahiro Itoh, and Ken-ichi Machida, Electromagnetic wave absorption properties of -Fe/Fe3B/Y2O3 nanocomposites in gigahertz range, Appl. Phys. Lett., Vol. 83, No. 19, 10 November 2003, 4017-4019.
Hong Zhu, Haiyan Lin, Hongfan Guo, Liufang Yu, Microwave absorbing property of Fe-filled carbon nanotubes synthesized by a practical route, Materials Science and Engineering B 138 (2007) 101–104.
B.H. Toby, EXPGUI, a graphical user interface for GSAS, J. Applied Crystallography (2000).
Ömer Guler, Ertan Evin, Carbon nanotubes formation by short-time ball milling and annealing of graphite, Optoelectronics and Advanced Materials – Rapid Communications Vol. 6, No. 1-2, January-February 2012, p. 183 – 187.
Z.P. Huang, D.Z. Wang, J.G. Wen, M. Sennett, H. Gibson, Z.F. Ren, Appl. Phys. A 74, 387–391 (2002)
