Purification of silicon by the silicon fluoride transport process. Thermochemical study

Technical Report · Sun Apr 15 00:00:00 EST 1979

DOI:https://doi.org/10.2172/5600977· OSTI ID:5600977

Rhein, R A

A computer-assisted thermochemical equilibrium analysis was conducted for the silicon transport reaction: Si(s) + SiF/sub 4/(g) = (intermediates) = Si(s) + SiF/sub 4/(g). The calculations indicated that a substantial transport rate should be possible at temperatures of 1700/sup 0/K and one atmosphere pressure. Computations were made to determine whether the elemental impurities present in metallurgical-grade silicon would transfer in this process. It was concluded that aluminum, chromium, copper, iron, manganese, molybdenum, nickel, vanadium, and zirconium would not transfer, but that boron, magnesium, phosphorus, and titanium would transfer.

• Research Organization: California Institute of Technology (CalTech), Pasadena, CA (United States). Jet Propulsion Lab. (JPL)
• DOE Contract Number: EX-76-A-29-1012
• OSTI ID: 5600977
• Report Number(s): DOE/JPL-1012-18
• Country of Publication: United States
• Language: English

Related Subjects

14 SOLAR ENERGY
36 MATERIALS SCIENCE
SILICON
PURIFICATION
CHEMICAL REACTION YIELD
CHEMICAL REACTIONS
EQUILIBRIUM
EXPERIMENTAL DATA
GRAPHS
IMPURITIES
MASS TRANSFER
SILICON FLUORIDES
SILICON SOLAR CELLS
THERMOCHEMICAL PROCESSES
DATA
DATA FORMS
DIRECT ENERGY CONVERTERS
ELEMENTS
EQUIPMENT
FLUORIDES
FLUORINE COMPOUNDS
HALIDES
HALOGEN COMPOUNDS
INFORMATION
NUMERICAL DATA
PHOTOELECTRIC CELLS
PHOTOVOLTAIC CELLS
SEMIMETALS
SILICON COMPOUNDS
SOLAR CELLS
SOLAR EQUIPMENT
YIELDS
140501* - Solar Energy Conversion- Photovoltaic Conversion
360601 - Other Materials- Preparation & Manufacture