Apparatus for obtaining silicon from fluosilicic acid
Abstract
Apparatus for producing low cost, high purity solar grade silicon ingots in single crystal or quasi single crystal ingot form in a substantially continuous operation in a two stage reactor starting with sodium fluosilicate and a metal more electropositive than silicon (preferably sodium) in separate compartments having easy vapor transport therebetween and thermally decomposing the sodium fluosilicate to cause formation of substantially pure silicon and a metal fluoride which may be continuously separated in the melt and silicon may be directly and continuously cast from the melt.
- Inventors:
-
- San Jose, CA
- Publication Date:
- OSTI Identifier:
- 865857
- Patent Number(s):
- US 4590043
- Application Number:
- 06/453,734
- Assignee:
- SRI International (Menlo Park, CA)
- Resource Type:
- Patent
- Country of Publication:
- United States
- Language:
- English
- Subject:
- apparatus; obtaining; silicon; fluosilicic; acid; producing; cost; purity; solar; grade; ingots; single; crystal; quasi; ingot; form; substantially; continuous; operation; stage; reactor; starting; sodium; fluosilicate; metal; electropositive; preferably; separate; compartments; easy; vapor; transport; therebetween; thermally; decomposing; formation; pure; fluoride; continuously; separated; melt; directly; cast; fluosilicic acid; sodium fluosilicate; thermally decomposing; continuous operation; substantially pure; single crystal; solar grade; stage reactor; purity solar; obtaining silicon; metal fluoride; substantially continuous; separate compartments; preferably sodium; pure silicon; vapor transport; silicon ingots; quasi single; reactor starting; grade silicon; continuously separated; ingot form; silicic acid; continuously cast; crystal ingot; /117/422/
Citation Formats
Sanjurjo, Angel. Apparatus for obtaining silicon from fluosilicic acid. United States: N. p., 1986.
Web.
Sanjurjo, Angel. Apparatus for obtaining silicon from fluosilicic acid. United States.
Sanjurjo, Angel. 1986.
"Apparatus for obtaining silicon from fluosilicic acid". United States. https://www.osti.gov/servlets/purl/865857.
@article{osti_865857,
title = {Apparatus for obtaining silicon from fluosilicic acid},
author = {Sanjurjo, Angel},
abstractNote = {Apparatus for producing low cost, high purity solar grade silicon ingots in single crystal or quasi single crystal ingot form in a substantially continuous operation in a two stage reactor starting with sodium fluosilicate and a metal more electropositive than silicon (preferably sodium) in separate compartments having easy vapor transport therebetween and thermally decomposing the sodium fluosilicate to cause formation of substantially pure silicon and a metal fluoride which may be continuously separated in the melt and silicon may be directly and continuously cast from the melt.},
doi = {},
url = {https://www.osti.gov/biblio/865857},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue May 20 00:00:00 EDT 1986},
month = {Tue May 20 00:00:00 EDT 1986}
}
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