THE CHEMISTRY OF SOLUTIONS OF CEO2 IN CRYOLITE MELTS

Authors
DEWING EW HAARBERG GR ROLSETH S RONNE L THONSTAD J AALBERG N
Citation
Ew. Dewing et al., THE CHEMISTRY OF SOLUTIONS OF CEO2 IN CRYOLITE MELTS, Metallurgical and materials transactions. B, Process metallurgy and materials processing science, 26(1), 1995, pp. 81-86
Citations number
14
Categorie Soggetti
Material Science","Metallurgy & Metallurigical Engineering
Journal title
Metallurgical and materials transactions. B, Process metallurgy and materials processing science → ACNP
ISSN journal
10735615
Volume
26
Issue
1
Year of publication
1995
Pages
81 - 86
Database
ISI
SICI code
1073-5615(1995)26:1<81:TCOSOC>2.0.ZU;2-5
Abstract
The solubility of CeO2 in cryolite has been investigated as a function of oxygen pressure, alumina content of the melt, and AlF3 content of the melt. Additional information comes from cryoscopic measurements, c yclic voltammetric studies, and thermodynamic calculations. The conclu sions are that (a) cerium in solution is exclusively Ce(III), (b) the dominant species are CeOF and CeF3, the latter probably complexed as N a2CeF5, (c) control of oxygen pressure is of importance in measuring t he solubility of the oxide of any metal that has more than one oxidati on state, but (d) there may be serious kinetic difficulties in equilib rating gas and molten salt.