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Electrochemical Preparation of Silicon and Its Alloys from Solid Oxides in Molten Calcium Chloride
Author(s) -
Jin Xianbo,
Gao Pei,
Wang Dihua,
Hu Xiaohong,
Chen George Z.
Publication year - 2004
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.200352786
Subject(s) - silicon , materials science , electrochemistry , oxide , alloy , metallurgy , molten salt , metal , chemical engineering , calcium oxide , chloride , molten metal , inorganic chemistry , electrode , chemistry , engineering
Electroreduction , or electrodeoxidation, of pelleted SiO 2 powder (left image) or its mixture with other metal oxide powders in molten CaCl 2 produces pure Si powder (right image), or the respective silicon alloy powder. Being advantageous by simplicity and resulting in less CO 2 emission, the electrochemical approach has an energy consumption that is below 13 kWh (kg of Si) −1 .
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