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

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Tilquin, JY. Duveiller, P Gilbert, J. Claes, Paul [UCL]

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.

Document type Communication à un colloque (Conference Paper) – Présentation orale avec comité de sélection
Publication date 1996
Language Anglais
Conference "Discussion Meeting of the Deutsche-Bunsen-Gesellschaft-fur-Physikalische-Chemie - Physical Chemistry of Glasses", JENA(Germany) (Mar 18-20, 1996)
Journal information "Deutsche Bunsen-Gesellschaft fuer Physikalische Chemie. Berichte" - Vol. 100, no. 9, p. 1489-1492 (1996)
Peer reviewed yes
issn 0005-9021
Publisher Vch Publishers Inc (Deerfield Beach)
Affiliation UCL - Autre
Keywords Electrochemistry ; Glasses ; High Temperature ; Spectroscopy, Ultraviolet ; Spectroscopy, Visible
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Bibliographic reference Tilquin, JY. ; Duveiller, P ; Gilbert, J. ; Claes, Paul. High-temperature study of multivalent elements in glass-forming melts: The particular case of iron.Discussion Meeting of the Deutsche-Bunsen-Gesellschaft-fur-Physikalische-Chemie - Physical Chemistry of Glasses (JENA(Germany), Mar 18-20, 1996). In: Deutsche Bunsen-Gesellschaft fuer Physikalische Chemie. Berichte, Vol. 100, no. 9, p. 1489-1492 (1996)
Permanent URL http://hdl.handle.net/2078.1/62852