Redox behavior of iron and vanadium ions in silicate melts at temperaturesup to 2000 degrees C

Authors
Leister, M Ehrt, D
Citation
M. Leister et D. Ehrt, Redox behavior of iron and vanadium ions in silicate melts at temperaturesup to 2000 degrees C, GL SCI T-GL, 72(5), 1999, pp. 153-160
Citations number
17
Categorie Soggetti
Material Science & Engineering
Journal title
GLASS SCIENCE AND TECHNOLOGY-GLASTECHNISCHE BERICHTE
ISSN journal
09467475 → ACNP
Volume
72
Issue
5
Year of publication
1999
Pages
153 - 160
Database
ISI
SICI code
0946-7475(199905)72:5<153:RBOIAV>2.0.ZU;2-5
Abstract
Two glasses 33Na(2)O . 67SiO(2) and 15Na(2)O . 85SiO(2) (composition in mol %), doped with Fe2O3 and V2O5, respectively, were melted under various cond itions in the temperature range of 1400 to 2000 degrees C. The redox states in the quenched glasses were investigated by optical absorption spectrosco py. Investigations concerning the redox equilibrium of the polyvalent ions in the glass melts were carried out using square-wave voltammetry. The resu lts of both methods were compared. Furthermore equilibrium experiments were carried out to show the time dependence of redox equilibrium reached.