Silicon powder and a method for producing silicon powder

Abstract From the Canadian patent

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 µm a, specific surface area between 0.001 and 1 m2/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 - 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. The invention further relates to a method for …