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. 2014 Feb 13;118(6):1584-8.
doi: 10.1021/jp4086816. Epub 2014 Jan 31.

Interaction between SiO2 and a KF-KCl-K2SiF6 Melt

Yurii P Zaykov  1 , Andrey V Isakov, Irina D Zakiryanova, Olga G Reznitskikh, Oleg V Chemezov, Alexander A Redkin
Affiliations

Interaction between SiO2 and a KF-KCl-K2SiF6 Melt

Yurii P Zaykov et al. J Phys Chem B. .

Abstract

The solubility mechanism of silica in a fluoride-chloride melt has been determined in situ using Raman spectroscopy. The spectroscopy data revealed that the silica solubility process involved Si-O bond breakage and Si-F bond formation. The process results in the formation of silicate complexes, fluorine-bearing silicate complexes, and silicon tetrafluoride in the melt. Mass spectrometry of the vapor phase over the KF-KCl-K2SiF6 and KF-KCl-K2SiF6-SiO2 melts and differential scanning calorimetry coupled with thermal gravimetric analysis of these melts were performed to verify the silica solubility mechanism.

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