Synthesis and Microwave-Absorbing Properties of Al₂O₃ Coated Polyhedral Fe Nanocapsules Prepared by Arc-Discharge Method

Abstract:

Al₂O₃ coated polyhedral Fe nanocapsules were prepared by arc-discharging a Fe-Al(8at%Al) alloy. High-resolution transmission electron microscopy (HRTEM), X-ray photoelectron spectroscopy, and network analyzer were employed to investigate the microstructures, compositions and electromagnetic properties (2-18GHz). The reflection loss R(dB) of the nanocapsules reaches to -50.5dB at 7.9GHz with a 3mm thickness, and EM absorption properties(RL<-20dB) in the 5.2~16.1GHz range with thickness range of 1.67-4.7mm. The excellent Microwave-absorption properties of as-prepared nanocapsules are ascribed to shape anisotropy and core/shell structure.

• Periodical: Advanced Materials Research (Volumes 299-300)
• Pages: 739-742
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.299-300.739
• Online since: July 2011
• Authors: Gui Mei Shi, Jin Bing Zhang, Da Wei Yu, Long Shan Chen
• Keywords: Arc-Discharge, Fe(Al₂O₃) Polyhedral Nanocapsule, Microwave Absorbing Property

References

[1] A. N. YUSOFF, M. H. ABDULLAH: J. Magn. Mater. 269(2) (2004), p.271.

[2] Z. W. Li, Li CHEN, W. U. FENG: Journal of Applied Physics. 96(1) (2004), p.534.

[3] D. Y. KIM, Y. C. CHUNG, T. W. KANG: IEEE Transactions on Magnetics. 32(2) (1996), p.555.

[4] J. L. Snoek: Physica (Amsterdam). 14 (1948), P. 207.

[5] D. Rousselle, A. Berthault, O. Acher, J. P. Bouchaud: J. Appl. Phys. 74 (1993), p.475.

[6] X. F. ZHANG, X. L. DONG, H. HUANG: J. Phys. D: Appl. Phys. 40 (2007), p.5383.

[7] X. F. ZHANG, X. L. DONG, H. HUANG: Appl. Phys. Lett. 89(5) (2006), p.1.

[8] X. G. LIU, D. Y. GENG, H. P. MENG: Appl. Phys. Lett. 92(17) (2008), p.1.

[9] W. Y. Park, J. C. Kim, J. H. Yu, C. J. Choi, Z. D. Zhang: J. Mater. Res. Vol. 20 (2005), p.2534.

[10] D. Y. GENG, W. Y. PARK, J. C. KIM: J. Mater. Res. 20(9) (2005), p.2534.