Chemistry of inorganic compounds – Silicon or compound thereof – Elemental silicon
Patent
1982-01-29
1984-05-01
Garris, Bradley
Chemistry of inorganic compounds
Silicon or compound thereof
Elemental silicon
156DIG64, 423341, 423490, C01B 3302, C30B 2902
Patent
active
044461208
ABSTRACT:
A process for preparing high purity silicon metal from Na.sub.2 SiF.sub.6 (sodium fluosilicate). The sodium fluosilicate is heated to decomposition temperature to form NaF, which retains most of the impurities, and gaseous SiF.sub.4. The SiF.sub.4 is then reduced by the bomb reduction method using a reductant having a low packing density.
REFERENCES:
patent: 3041144 (1962-06-01), Schering
patent: 4124410 (1978-11-01), Kotval et al.
patent: 4139438 (1979-02-01), Fey et al.
patent: 4312850 (1982-01-01), Dietl et al.
Schmidt et al.; "The Preparation of High Purity Silicon Using Thermite Reactions"; IS-4762; 10/1/79-11/10/80.
Sanjurjo et al.; "Silicon by Sodium Reduction of Silicon Tetrafluoride"; J. Electrochem. Soc.; vol. 128; No. 1; pp. 179-183; 7/21/80.
Hartman et al.; "Processing and Purification of Silicon for Semiconductor Use"; Metal Progress; pp. 100-103; Oct. 1956.
Chiotti; "The Pseudobinary System NaF-Na.sub.2 SiF.sub.6 "; J. of the Less Common Metals; 80; pp. 105-113; Feb. 1981.
Chiotti; "Dissociation Pressure and Thermodynamic Properties of Na.sub.2 SiF.sub.6 "; J. of Less Common Metals; 80; Feb. 1981; pp. 97-104.
Sanjurjo et al.; "Production of Silicon for Solar Cells"; Mat. Res. Bull.; vol. 16; pp. 437-451; Feb. 1981.
Chiotti Premo
Rehbein David
Schmidt Frederick A.
Esposito Michael F.
Garris Bradley
Rees Walter L.
The United States of America as represented by The United States
Weinberger James W.
LandOfFree
Method of preparing silicon from sodium fluosilicate does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method of preparing silicon from sodium fluosilicate, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method of preparing silicon from sodium fluosilicate will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2031391