Abstract
Volcanic rock found in the Longgang Volcano Group in Jilin Province of China has properties essentially similar to Apollo lunar soils and previously prepared lunar soil simulants, such as Johnson Space Center Lunar simulant and Minnesota Lunar simulant. In this study, an electrochemical method of preparation of Al-Si master alloy was investigated in 52.7 wt.%NaF-47.3 wt.%AlF3 melt adding 5 wt.% volcanic rock at 1233 K. The cathodic electrochemical process was studied by cyclic voltammetry, and the results showed that the cathodic reduction of Si(IV) is a two-step reversible diffusion-controlled reaction. Si(IV) is reduced to Si(II) by two electron transfers at −1.05 V versus platinum quasi-reference electrode in 52.7 wt.%NaF-47.3 wt.%AlF3 molten salt adding 5 wt.% volcanic rock, while the reduction peak at −1.18 V was the co-deposition of aluminum and silicon. In addition, the cathodic product obtained by galvanostatic electrolysis for 4 h was analyzed by means of x-ray diffraction, x-ray fluorescence, scanning electron microscopy and energy dispersive spectrometry. The results showed that the phase compositions of the products are Al, Si, Al5FeSi, and Al3.21Si0.47, while the components are 90.5 wt.% aluminum, 4.4 wt.% silicon, 1.9 wt.% iron, and 0.2 wt.% titanium.
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References
M.B. Duke, B.R. Blair, and J. Diaz, Adv. Space Res. 31, 2413 (2003).
R.S. Baird, G.B. Sanders, and T.M. Simon, AIP Conf. Proc. 654, 1087 (2003).
G.B. Sanders and W.E. Larson, J. Aerosp. Eng. 26, 5 (2013).
Y.H. Lu, D. Mantha, and R.G. Reddy, Metall. Mater. Trans. B. 41, 1321 (2000).
S. Sen, C.S. Ray, and R.G. Reddy, Mater. Sci. Eng. 413, 592 (2005).
Y. Kobayashi, H. Sonezaki, R. Endo, and M. Susa, ISIJ Int. 50, 35 (2010).
R. Balasubramaniam, S. Gokoglu, and U. Hegde, Int. J. Miner. Process 96, 54 (2010).
A.H. Sirk, D.R. Sadoway, and L. Sibille, ECS Trans. 28, 367 (2010).
C. Schwandt, J.A. Hamilton, D.J. Fray, and I.A. Crawford, Planet Space Sci. 74, 49 (2012).
Y.C. Zheng, S.J. Wang, Z.Y. Ouyang, Y.L. Zou, J.Z. Liu, C.L. Li, X.Y. Li, and J.M. Feng, Adv. Space Res. 43, 448 (2009).
K. Grjotheim, Aluminium Electrilysis, 2nd ed. (Düsseldorf: Aluminium-Verlag, 1982), p. 365.
X.G. Yu and Z.X. Qiu, J. Northeast. Univ. (Nat. Sci.) 25, 442 (2004).
A.M. Liu, L.X. Li, J.L. Xu, Z.N. Shi, X.W. Hu, B.L. Gao, Z.W. Wang, J.Y. Yu, and G. Chen, JOM 66, 694 (2014).
Z.X. Qiu, M.J. Zhang, and Y.X. Yu, Aluminium 64, 606 (1988).
Z.N. Shi, J.L. Xu, Z.W. Wang, and B.L. Gao, Electrochemistry 77, 656 (2009).
Z.N. Shi, J.L. Xu, and Z.X. Qiu, JOM 55, 63 (2003).
M. Jia, Y.Q. Lai, Z.L. Tian, F.Y. Liu, J. Li, P.F. Xin, and Y.X. Liu, Acta Phys. Chim. Sin 27, 1108 (2011).
Z.N. Shi, M. Li, L.L. Li, B.L. Gao, X.W. Hu, and Z.W. Wang, Trans. Nonferr. Met. Soc. China 21, 1655 (2011).
L. Massot, P. Chamelot, F. Bouyer, and P. Taxil, Electrochim. Acta 47, 1949 (2002).
A.J. Bard and R.L. Faulkner, Electrochemical Methods Fundamentals and Applications, 2nd ed. (New York: Wiley, 2001), p. 231.
A.L. Bieber, L. Massot, M. Gibilaro, L. Cassayre, P. Taxil, and P. Chamelot, Electrochim. Acta 62, 282 (2012).
Z.Y. Cai, Y.G. Li, X.F. He, and J.L. Liang, Metall. Mater. Trans. B 41, 1033 (2010).
Acknowledgements
The authors would like to acknowledge the financial support from the National Natural Science Foundation of China (Nos. 51322406, 51574071, and 51474060), the Program for New Century Excellent Talents (NCET-13-0107), Ministry of Education of China, and the Fundamental Research Funds for the Central Universities (Nos. N140205001, L1502014).
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Liu, A., Shi, Z., Xu, J. et al. Preparation of Al-Si Master Alloy by Electrochemical Reduction of Volcanic Rock in Cryolite Molten Salt. JOM 68, 1518–1524 (2016). https://doi.org/10.1007/s11837-016-1898-x
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DOI: https://doi.org/10.1007/s11837-016-1898-x