Fabrication Method of Silicon Powder and Silicon Ingot by Self-propagating High-Temperature Synthesis

摘要

PURPOSE: A manufacturing method of silicon powder and silicon ingot by self-propagating high-temperature synthesis is provided to produce a large quantity of silicon with a single process, and to selectively manufacture the silicon powder or the silicon ingot. CONSTITUTION: A manufacturing method of silicon by self-propagating combustion synthesis comprises a step for manufacturing raw materials containing Sodium metasilicate anhydrous, silicide, metal reducing agent and potassium chlorate to the silicon powder or the silicon ingot. The manufacturing method of the silicon by the self-propagating combustion synthesis includes a step for producing the raw materials, a step for reducing silicide by heating or igniting the raw material, and a step for leaching the reactants with acid liquid after washing the reactnats with distilled water.