| 摘要 |
<p>The present application discloses a process for the preparation of high-purity silicon, said process comprising the steps of: a) at least in one cycle treating a particulate silicon source material i) with a sub-stoichiometric amount of an active metal, such as magnesium, and subsequently ii) with a hydrogen-containing material, such as an ammonium halogenide, thereby obtaining a pre-treated silicon source material; b) alloying said pre-treated silicon source material with i) an active metal, such as magnesium, so as to obtain a basic amount of metal silicide, and optionally purifying said metal silicide; c) reacting the basic amount of metal silicide with a hydrogen-containing material, such as an ammonium halogenide, and obtaining of a basic amount of silane (SiH4); d) purifying said silane (SiH4); and e) thermally decomposing said silane and optionally purifying the resulting silicon to obtain high-purity silicon. The application also discloses an installation intended for the high purity silicon production process in industrial scale.</p> |
