High-temperature study of multivalent elements in glass-forming melts: The particular case of iron

Tilquin, JY.;Duveiller, P;Gilbert, J.;Claes, Paul
(1996) Discussion Meeting of the Deutsche-Bunsen-Gesellschaft-fur-Physikalische-Chemie - Physical Chemistry of Glasses — Location: JENA(Germany) (18.March.1996)

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  • Tilquin, JY.
    Author
  • Duveiller, P
    Author
  • Gilbert, J.
    Author
  • Claes, PaulUCLouvain
    Author
Abstract
Linear sweep voltammograms and absorption spectra were recorded in Na2O . 2.5 SiO2 containing about 1 wt% Fe at some temperatures ranging from 600 degrees C to 1000 degrees C. The reduction peaks which are observed in the melt at 600 degrees C disappear at 1000 degrees C. The absorption spectra obtained at high temperature are characteristic by a displacement of the charge transfer band and of the band related to octahedral Fe(II) towards higher wavelengths. No remarkable change in the Fe(III)-Fe(II) redox equilibrium and in the coordination of the Fe(II) has been observed between 600 degrees C and 1000 degrees C.
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Tilquin, JY., Duveiller, P., Gilbert, J., & Claes, P. (1996). High-temperature study of multivalent elements in glass-forming melts: The particular case of iron. Deutsche Bunsen-Gesellschaft fuer Physikalische Chemie. Berichte, 100(9), 1489-1492. https://hdl.handle.net/2078.5/86805 (Original work published 1996)