Electromagnetic Wave-Absorbing Properties of Steel Slag
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This research explores the electromagnetic radiation protection function of steel slag for use as a building material. Scanning electron microscopy, x-ray diffraction, x-ray photoelectron spectroscopy and Mössbauer spectroscopy were used to analyze the chemical composition and mineralogical phase of steel slag powder. Electromagnetic parameters of the samples were analyzed and discussed in detail for the frequency range of 1-18 GHz. We found that steel slag had the electromagnetic wave-absorbing property due to electric components (such as FeO and carbon powder) and magnetic components [such as magnetite (Fe3O4) and hematite (α-Fe2O3)]; electric loss was far greater than magnetic loss. With the increasing milling time, the electric and magnetic properties were increased. The calculated reflectivity curve of steel slag powder epoxide resin–matrix composite at a thickness of 10 mm had several interference peaks, and the absorbing properties increased gradually with increasing frequency. Moreover, the minimum reflectivity was − 21 dB (Decibel) at 13 GHz (Gigahertz). The steel slag powder cement-based composite showed electromagnetic wave-absorbing properties at 10-18 GHz, and the greatest absorption of the 25 mm sample reached 11.5 dB; therefore, the steel slag shows promise as a building material for electromagnetic protection.
Keywordschemical composition electromagnetic wave-absorbing properties mineralogical phase steel slag
The investigation was funded by the Pre-research Fund of PLA University of Science and Technology (20140327) and supported by the Ministry of Housing and Urban-Rural Development of the People’s Republic of China (2008-K4-6). The authors thank Dr. Yongbao Feng for the calculation of reflectivity.
- 1.G. Bantsis, S. Mavridou, and C. Sikalidis, Comparison of Low Cost Shielding-Absorbing Cement Paste Building Materials in X-Band Frequency Range Using a Variety of Wastes, Ceram. Int., 2012, 38, p 3688–3692Google Scholar
- 4.Y.S. Dai, C.H. Lu, Y.R. Ni, and Z.Z. Xu, Radar-Wave Absorbing Property of Cement-Based Composite Doped with Steel Slag, J. Chin. Ceram. Soc. China, 2009, 37, p 147–151Google Scholar
- 7.GJB2038A-2011, The measurement methods for reflectivity of radar absorbing material. CN-GJB-Z (2011)Google Scholar
- 8.G.H. Hou, W.H. Li, W. Guo, J.H. Chen, J.H. Luo, and J.G. Wang, Microstructure and Mineral Phase of Converter Slag, J. Chin. Ceram. Soc. China, 2008, 36, p 436–443Google Scholar
- 17.D. Micheli, R. Pastore, A. Vricella, R.B. Morles, M. Marchetti, A. Delfini, F. Moglie, and V. Mariani Primiani, Electromagnetic Characterization and Shielding Effectiveness of Concrete Composite Reinforced with Carb on Nanotubes in the Mobile Phones Frequency Band, Mater. Sci. Eng. B, 2014, 188, p 119–129CrossRefGoogle Scholar
- 19.J.F. Moulder, W.F. Stickle, and P.E. Sobol, Handbook of X-Ray Photoelectron Spectroscopy, Perkin Elmer Corp., Physical Electronics Inc, USA, Eden Prairie, 1995Google Scholar
- 25.T.D. Zhou, Z.Y. Wang, J.K. Tang, and H.P. Lu, Structure and Magnetic Properties of Fe-Based Powders Prepared by Mechanical Alloying, Acta Metall. Sin. (Eng1.Lett.), 2010, 23, p 351–356Google Scholar