Patent application number | Description | Published |
20110044877 | METHOD OF PURIFYING SILICON UTILIZING CASCADING PROCESS - The present invention relates to a method of purifying a material using a metallic solvent. The present invention includes a method of purifying silicon utilizing a cascade process. In a cascade process, as the silicon moves through the purification process, it contacts increasingly pure solvent metal that is moving through the process in an opposite direction. | 02-24-2011 |
20120260850 | METHOD OF PURIFYING SILICON UTILIZING CASCADING PROCESS - The present invention relates to a method of purifying a material using a metallic solvent. The present invention includes a method of purifying silicon utilizing a cascade process. In a cascade process, as the silicon moves through the purification process, it contacts increasingly pure solvent metal that is moving through the process in an opposite direction. | 10-18-2012 |
20150040821 | METHOD FOR PURIFICATION OF SILICON - 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. | 02-12-2015 |
20150158731 | LINING FOR SURFACES OF A REFRACTORY CRUCIBLE FOR PURIFICATION OF SILICON MELT AND METHOD OF PURIFICATION OF THE SILICON MELT USING THAT CRUCIBLE - A crucible for containing molten silicon comprises at least one refractory material having at least one inner surface defining an interior for receiving a molten silicon mixture, and a lining deposited onto the inner surface, the lining comprising colloidal alumina. A method for silicon purification comprises contacting a first silicon with a solvent metal comprising aluminum, sufficient to provide a first mixture, melting the first mixture in an interior of a melting crucible to provide a molten silicon mixture, the melting crucible comprising at least one refractory material having an inner surface defining the interior of the melting crucible, coating at least a portion of the inner surface of the melting crucible with a lining comprising colloidal alumina prior to melting first mixture, cooling the molten silicon mixture, sufficient to form recrystallized silicon crystals and a mother liquor, and separating the final recrystallized silicon crystals and the mother liquor. | 06-11-2015 |
20150175431 | METHOD TO PURIFY ALUMINUM AND USE OF PURIFIED ALUMINUM TO PURIFY SILICON - The present invention provides a method of purifying aluminum, and/or use of the purified aluminum as a solvent metal to purify silicon. | 06-25-2015 |
20150184311 | LINING FOR SURFACES OF A REFRACTORY CRUCIBLE FOR PURIFICATION OF SILICON MELT AND METHOD OF PURIFICATION OF THE SILICON MELT USING THAT CRUCIBLE(S) FOR MELTING AND FURTHER DIRECTIONAL SOLIDIFICATION - A crucible for molten silicon comprises at least one refractory material having an inner surface and a lining deposited onto the inner surface, the lining comprising colloidal silica. A method for silicon purification comprises melting a first silicon in an interior of a melting crucible to provide a first molten silicon, the melting crucible comprising a first refractory material having at least one first inner surface defining the melting crucible interior, directionally solidifying the first molten silicon in a directional solidification mold to provide a second silicon, the directional solidification mold comprising a second refractory material having at least one second inner surface defining a mold interior, and coating at least a portion of at least one of the first inner surface and the second inner surface with a lining comprising colloidal silica. | 07-02-2015 |
20150191362 | METHOD OF PURIFYING CALCIUM FLUORIDE - 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. | 07-09-2015 |
20150225247 | REACTIVE COVER GLASS OVER MOLTEN SILICON DURING DIRECTIONAL SOLIDIFICATION - A method comprises forming molten silicon ( | 08-13-2015 |