Elkem As

Oyvind Sorli

Karl Forwald

Gunnar Schussler

The invention relates to a method for continuous production of silicon powder comprising the combination of the following steps:

Silicon powder and method for production of silicon powder

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.

Silicon powder and a method for producing silicon powder by gas

The present application relates to a method for production of trichloromonosilane in a fluidized bed reactor by reaction of silicon powder and HCl at a temperature between 280.degree. and 300.degree. C. wherein silicon powder which has been produced by gas atomization of molten silicon is used. The gas atomized silicon powder has a preferred particle size between 1 and 1000 .mu.m.

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Sewickley, Norway

Oyvind Sorli