| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 9781796 | Journal of Physics and Chemistry of Solids | 2005 | 5 Pages |
Abstract
Electrochemical reduction of solid SiO2 by using a contacting electrode method was investigated in molten CaCl2 at 1123Â K. The samples were prepared by potentiostatic electrolysis at 0.35-1.30Â V (vs. Ca2+/Ca) for 1Â h. From the results of XRD, SEM and EPMA, it was confirmed that SiO2 was electrochemically reduced to Si at 1.25Â V or more negative potential, which agreed with the thermodynamic calculation. The current-time curves during electrolysis and the cross-sectional SEM measurements of the samples clearly showed that reduction rate is higher at more negative potential. In addition, Si-Ca alloy formation was confirmed at 0.35Â V.
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Authors
Kouji Yasuda, Toshiyuki Nohira, Yasuhiko Ito,