Silicon powder and a method for producing silicon powder by gas atomization of silicon
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United States of America Patent
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Mar 10, 1992
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N/A
app pub date -
Dec 10, 1990
filing date -
Dec 8, 1988
priority date (Note) -
Expired
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Abstract
The present invention relates to a silicon powder, which is characterized in that it is produced by gas atomizing of molten silicon and having a particle size between 0,1 and 1000 .mu.m, a specific surface area between 0.001 and 1 m.sup.2 /g, and the following chemical composition in percent by weight: 0.1-1% iron, 0.01-1% aluminium, 0-8% copper, 0-1% calcium, 0-1% zinc, 0-1% tin, 0-5% boron, 0-0.5% phosphorus, 0-0.5% sodium, 0-0.5% lithium, 0-0.5% potassium, 0-0.5% magnesium, 0-0.5% strontium, 0-0.5% barium, 0-0.5% beryllium, the rest being silicon and less than 0.3% impurities such as Ti, V, Cr, Mo, W and Zr.
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