摘要:
A method that includes: (a) forming a molten liquid from a solvent metal, silicon, and an alkali magnesium halide; (b) cooling the molten liquid to provide silicon crystals and a mother liquor; and (c) separating the silicon crystals from the mother liquor.
摘要:
The present invention relates to an apparatus and method for purifying materials using a rapid directional solidification. Devices and methods shown provide control over a temperature gradient and cooling rate during directional solidification, which results in a material of higher purity. The apparatus and methods of the present invention can be used to make silicon material for use in solar applications such as solar cells.
摘要:
The present invention provides a method for purifying an inorganic compound, in particular calcium fluoride. The method includes contacting (e.g., washing) the inorganic compound with an aqueous solution, in particular hydrochloric acid.
摘要:
A method that includes: (a) forming a molten liquid from a solvent metal, silicon, and an alkali magnesium halide; (b) cooling the molten liquid to provide silicon crystals and a mother liquor; and (c) separating the silicon crystals from the mother liquor.
摘要:
A method comprises forming molten silicon (206) in a crucible (202), forming a solidified silicon (208) at a top portion of the molten silicon (206), contacting the solidified silicon (208) with glass (210), heating the solidified silicon (208) and the glass (210), sufficient to melt the solidified silicon and the glass, to provide a molten glass (212) on the molten silicon (206), and allowing the molten liquid to directionally solidify, from the bottom portion of the molten liquid toward the top portion of the molten liquid, to provide solid silicon (214) with a higher purity.
摘要:
The present invention relates to the purification of silicon. The present invention provides a method for purification of silicon. The method includes recrystallizing starting material-silicon from a molten solvent comprising aluminum to provide final recrystallized-silicon crystals. The method also includes washing the final recrystallized-silicon crystals with an aqueous acid solution to provide a final acid-washed-silicon. The method also includes directionally solidifying the final acid-washed-silicon to provide final directionally solidified-silicon crystals.