METHOD FOR PURIFICATION OF SILICON
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United States of America Patent
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Feb 12, 2015
app pub date -
Jan 25, 2013
filing date -
Jan 26, 2012
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Abstract
The present invention relates to the purification of silicon. The present invention provides a method for purification of silicon. The method includes recrystallizing starting material-silicon from a molten solvent comprising aluminum to provide final recrystallized-silicon crystals. The method also includes washing the final recrystallized-silicon crystals with an aqueous acid solution to provide a final acid-washed-silicon. The method also includes directionally solidifying the final acid-washed-silicon to provide final directionally solidified-silicon crystals.
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