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

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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.

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28 pages

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Rhein, R. A. April 15, 1979.

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  • Main Title: Purification of silicon by the silicon fluoride transport process. Thermochemical study
  • Series Title: Low-Cost Solar Array Project

Description

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.

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28 pages

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Dep. NTIS, PC A03/MF A01.

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Office of Scientific & Technical Information Technical Reports

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  • April 15, 1979

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  • Feb. 10, 2018, 10:06 p.m.

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  • Jan. 25, 2021, 8:47 p.m.

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Rhein, R. A. Purification of silicon by the silicon fluoride transport process. Thermochemical study, report, April 15, 1979; Pasadena, California. (https://digital.library.unt.edu/ark:/67531/metadc1090500/: accessed November 28, 2023), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.

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