Apparatus for obtaining silicon from fluosilicic acid

Details Apparatus for obtaining silicon from fluosilicic acid Apparatus for obtaining silicon from fluosilicic acid

1982-12-27

1986-05-20

Bernstein, Hiram H.

Chemical apparatus and process disinfecting, deodorizing, preser

Chemical reactor

With means applying electromagnetic wave energy or...

422232, 422248, 156DIG64, C30B 1510

Patent

active

045900434

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.

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