Actions for Silicon halide-alkali metal flames as a source of solar grade silicon. Third quarterly report

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Silicon halide-alkali metal flames as a source of solar grade silicon. Third quarterly report

Author
Olson, D. B.
Published
United States : [publisher not identified], 1978.
[Oak Ridge, Tennessee] : [U.S. Atomic Energy Commission], 1978.
Physical Description
microfiche : negative ; 11 x 15 cm
Additional Creators
Miller, W. J

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Summary
It is proposed to determine the feasibility of using continuous flames of alkali metals and silicon halides in a large scale process to produce solar-grade silicon at low cost. Primary emphasis is being given to the reaction of Na with SiCl/sub 4/. The measurements of K or Na + SiCl/sub 4/, Na + SiHCl/sub 3/, and K or Na + SiF/sub 4/ flame spectra were completed. Construction of the scaled-up tubular flow reactor has been completed and experiments begun. Stable flames of Na + SiCl/sub 4/ diluted with H/sub 2//Ar were achieved and samples of solid product were taken from the reactor walls. Thermochemical calculations of the input conditions necessary to simulate the Westinghouse silicon process showed that we can achieve the same total enthalpy (and reaction zone temperature) by using vaporized reactants with H/sub 2//Ar heated to 1300 K. Construction of the necessary H/sub 2//Ar oven has been completed and experiments have begun.
Report Numbers
DOE/JPL/954777-3; AeroChem-TN-187
Other Subject(s)
Collection
U.S. Atomic Energy Commission depository collection.
Note
DOE contract number: NAS-7-100-954777
OSTI Identifier 5029644
Research organization: Aerochem Research Labs., Inc., Princeton, N.J. (USA).
View MARC record | catkey: 44797448