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Electrochemical reduction of solid SiO 2 by using a contacting electrode method was investigated in molten CaCl 2 at 1123K. The samples were prepared by potentiostatic electrolysis at 0.35–1.30V (vs. Ca 2+ /Ca) for 1h. From the results of XRD, SEM and EPMA, it was confirmed that SiO 2 was electrochemically reduced to Si at 1.25V or more negative potential, which agreed...
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