Fluxing action of naf on oxidized silicon

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Abstract

In a novel low-cost method for production of high purity Si, a mixed reaction product consisting of Si and NaF is readily separated by melting. During melting, surface SiO₂ is removed from Si particles by fluxing action of the NaF, thus promoting coalescence of molten Si drops. X-ray diffraction evidence indicates that a high temperature modification of Na₂SiF₆ is formed as a result of reaction between NaF and SiO₂.

L. NANIS, formerly with SRI International, Menlo Park, CA

S. WESTPHAL, formerly with SRI International, Menlo Park, CA

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Fluxing action of naf on oxidized silicon

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Abstract

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