Very large purity silicon for semiconductors is received utilizing the Siemens course of action; the silicon is reacted to produce trichlorosilane, which can be 1st purified by distillation, then reacted with purified hydrogen on significant purity silicon rods at 1150 oC to generate significant purity, polycrystalline silicon with hydrochloric acid https://glasslineddippipe50482.wikijm.com/1645532/considerations_to_know_about_sic_crucible