Iron oxide-doped alkali-lime-silica glasses Part 2. Voltammetric studies
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Date
1993
Authors
Volume
66
Issue
Journal
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Book Title
Publisher
Offenbach : Verlag der Deutschen Glastechnischen Gesellschaft
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Abstract
Alkali-lime-silica glass melts doped with different quantities of Fe2O3 in the range of 0.1 to 2 mol% were studied by means of square-wave voltammetry. At low iron concentrations a one-step reduction of Fe^III to Fe^II was observed. The shift of the standard potential with the alkali concentration is explained using a structural model where FeIII occurs as a tetrahedrally coordinated complex which forms an ion pair with an alkali cation. At higher Fe2O3 quantities a two-step reduction was observed. This means that FeIII-containing compounds occur as two thermodynamically different species. In agreement with the EPR-spectroscopic behaviour, this was explained by the formation of iron-containing clusters.
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Citation
Rüssel, C. (1993). Iron oxide-doped alkali-lime-silica glasses
Part 2. Voltammetric studies. 66.
License
CC BY 3.0 DE