AN INVESTIGATION INTO THE ELECTROCHEMICAL PRODUCTION OF Si BY THE FFC CAMBRIDGE PROCESS

Date

2012-03-15

Author

ERGUL, Emre
Karakaya, İshak
Erdoğan, Metehan
ERDEN, Fuat

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This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

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The FFC Cambridge process was suggested as a promising Si production technique for the expanding solar energy industry. Direct electrochemical reduction of bulk SiO2 plates and porous SiO2 pellets in molten CaCl2-NaCl salt mixture were investigated at 750 degrees C by applying 2.8 V potential difference. The produced Si powder was brown and found to be contaminated by the Ni and stainless steel plates used as the cathode contacting materials. The reduction rates of the bulk SiO2 plates and porous SiO2 pellets were compared from variations of current and accumulative electrical charge that passed through the cell during the electrochemical reduction. The amorphous bulk SiO2 plates were reduced slightly faster than porous pellets of crystalline SiO2. The overall reduction potential of SiO2 pellets against the graphite anode at 750 degrees C in molten CaCl2- NaCl salt mixture was determined as 2.3 V by cyclic voltammetry. This potential was supported by calculations.

Subject Keywords

FFC Cambridge Process, Solar grade silicon, Cyclic voltammetry

URI

https://hdl.handle.net/11511/52781

Collections

Department of Metallurgical and Materials Engineering, Conference / Seminar

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Citation Formats

E. ERGUL, İ. Karakaya, M. Erdoğan, and F. ERDEN, “AN INVESTIGATION INTO THE ELECTROCHEMICAL PRODUCTION OF Si BY THE FFC CAMBRIDGE PROCESS,” 2012, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/52781.