Apparatus for obtaining silicon from fluosilicic acid
Apparatus for producing low cost, high purity solar grade Si wherein a reduction reaction, preferably the reduction of SiF[sub 4], by an alkali metal (Na preferred) is carried out by jetting a spray of reactants into a reaction chamber at a rate and temperature which causes the reaction to take place far enough away from the entry region to avoid plugging of reactants at the entry region and wherein separation in the melt is carried out continuously from the reaction and the Si can be cast directly from the melt. The melt separation is provided by openings in the reaction chamber wall between about 2 and 3.5 millimeters in width. The Si is retained within the reaction chamber due to its surface tension. 5 figs.
- Assignee:
- SRI International, Menlo Park, CA (United States)
- Patent Number(s):
- US 4597948; A
- Application Number:
- CNN: 954471-NAS 7-100; PPN: US 6-569439
- OSTI ID:
- 7005359
- Resource Relation:
- Patent File Date: 9 Jan 1984
- Country of Publication:
- United States
- Language:
- English
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Apparatus for obtaining silicon from fluosilicic acid
Apparatus for obtaining silicon from fluosilicic acid
Related Subjects
14 SOLAR ENERGY
CHEMICAL REACTORS
DESIGN
SILICON
CHEMICAL VAPOR DEPOSITION
SILICON SOLAR CELLS
FABRICATION
REDUCTION
SEPARATION PROCESSES
SILICON FLUORIDES
CHEMICAL COATING
CHEMICAL REACTIONS
DEPOSITION
DIRECT ENERGY CONVERTERS
ELEMENTS
EQUIPMENT
FLUORIDES
FLUORINE COMPOUNDS
HALIDES
HALOGEN COMPOUNDS
PHOTOELECTRIC CELLS
PHOTOVOLTAIC CELLS
SEMIMETALS
SILICON COMPOUNDS
SILICON HALIDES
SOLAR CELLS
SOLAR EQUIPMENT
SURFACE COATING
360601* - Other Materials- Preparation & Manufacture
140501 - Solar Energy Conversion- Photovoltaic Conversion