Metallurgical-grade silicon with a controlled structure for use in halosilane synthesis
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United States of America Patent
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May 21, 2002
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N/A
app pub date -
Jan 28, 1999
filing date -
Apr 2, 1996
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Expired
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Abstract
A metallurgical-grade silicon for use in alkyl or aryl halosilane synthesis, and having a structure consisting of primary silicon crystals and intermetallic compounds, particularly of silicon, aluminum and calcium, wherein at least 90% of the primary silicon crystals have an aluminum content of 50-1000 ppm. This structure substantially enhances the reactivity of the silicon in the synthesis reaction.
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