Silicon tetrachloride reduction by aluminum subchloride was studied experimentally. Aluminum subchloride was synthesized in a reaction of metallic aluminum and AlCl3; a burner-like construction of the reactor was used to avoid the direct reaction of aluminum and SiCl4. The reduction was conducted at a pressure of 0.1 MPa and two temperature regimes: 1273 K and 1373 K (1000 °C and 1100 °C). As a result, two types of products were obtained: crystals and fine particles. The crystals formation occurred in the high-temperature zone, whereas the particles were dispersed by argon flow and concentrated mainly in aluminum chloride by-product in the cold part of the reactor. It was shown that silicon yield increased with increasing AlCl concentration. The temperature of the reduction process did not have a significant effect on the ultimate silicon yield. However, the silicon etching reaction rate and fine particles yield increased as temperature increased. X-ray diffraction and scanning electron microscopy analysis showed that the impurities content in silicon crystals was below the detection limit. In contrast, the aluminum content in the powder product was 2 to 3 wt pct. Another type of product, yellow blanket-like silicon fibers, was obtained with a high yield at 1373 K (1100 °C) and low [AlCl]:[SiCl4] ratio.
This is a preview of subscription content, log in to check access.
Buy single article
Instant access to the full article PDF.
Price includes VAT for USA
Subscribe to journal
Immediate online access to all issues from 2019. Subscription will auto renew annually.
This is the net price. Taxes to be calculated in checkout.
1. J. Safariana, G. Tranella and M. Tangstada: Energy Procedia, 2012, vol. 20, pp. 88 – 97.
2. K. Yasuda and T.H. Okabe: JOM, 2010, vol. 62 (12), pp. 94-101.
3. C.W. Won, H.H. Nersisyan and H.I. Won: Sol. Energy Mater. Sol. Cells, 2011, vol. 95, pp. 745-50.
4. X. Xie, K. Lau and A. Sanjurjo: Metal. Metall. Mater. Trans. E., 2016, vol. 4E, pp. 2017-29.
5. K. Shinoda, H. Murakami, Y. Sawabe and K. Saegusa: Chem. Eng. J., 2012, vol. 198-199, pp. 61-64.
J. Myrick: Production of Metals and Their Alloys, WO 01/45906 A2, 2001.
7. R.A. Zakirov, O.G. Parfenov and L.A. Solovyov: Metall. Mater. Trans. B, 2018, vol. 49B, pp.13-16.
8. O.G. Parfenov and G.L. Pashkov: Dokl. Chem., 2008, vol. 422 (2), pp. 225–26.
9. K. Yasuda, K. Saegusa and T.H. Okabe: Metall. Mater. Trans. B, 2011, vol. 42, pp. 37-49.
10. T. Kikuchi, T. Yagihashi and T. Kurosawa: Mater. Trans. JIM, 1964, Vol. 5, pp. 122-27.
11. T. Kikuchi, T. Yagihashi and T. Kurosawa: Mater. Trans. JIM, 1972, Vol. 13, pp. 365-70.
12. N. Uesawa, S. Inasawa and Y. Tsuji: J. Phys. Chem. C, 2010, vol. 114, pp. 4291–96.
13. H. Schäffer: Chemical Transport Reactions, Academic press, New York and London, 1964, pp. 40-44.
Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.
Manuscript submitted November 14, 2018.
About this article
Cite this article
Zakirov, R.A., Parfenov, O.G. Silicon Production via Reaction of Silicon Tetrachloride and Aluminum Subchloride. Metall Mater Trans B 50, 2197–2204 (2019). https://doi.org/10.1007/s11663-019-01653-6