Solubility of Chromium(III) Oxide in the Molten Cryolite System

Solubility of Chromium(III) Oxide in the Molten Cryolite System

The solubility of Cr(III) species originating from dissolution of Cr 2 O 3 in cryolite-based melts was studied in the temperature range 1173 K to 1293 K (900 °C to 1020 °C). The molar ratio n (NaF)/n(AlF 3 ) was in the range of 1.4 to 2.6. It was found that the solubility depends markedly on the mol...

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Veröffentlicht in:Metallurgical and materials transactions. B, Process metallurgy and materials processing science Process metallurgy and materials processing science, 2013-04, Vol.44 (2), p.328-331
Hauptverfasser: Šuleková, Dáša, Danielik, Vladimir, Fellner, Pavel, Thonstad, Jomar
Format: Artikel
Sprache:eng
Schlagworte:
Applied sciences
Characterization and Evaluation of Materials
Chemistry and Materials Science
Chromium
Chromium oxides
Exact sciences and technology
Materials Science
Mathematical models
Melting
Melts
Metallic Materials
Metals. Metallurgy
Nanotechnology
Oxides
Process metallurgy
Production of metals
Solubility
Standard deviation
Structural Materials
Surfaces and Interfaces
Temperature effects
Thin Films
Transaction processing
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Zusammenfassung:The solubility of Cr(III) species originating from dissolution of Cr 2 O 3 in cryolite-based melts was studied in the temperature range 1173 K to 1293 K (900 °C to 1020 °C). The molar ratio n (NaF)/n(AlF 3 ) was in the range of 1.4 to 2.6. It was found that the solubility depends markedly on the molar ratio n (NaF)/ n (AlF 3 ), high ratios resulting in higher solubility. A semi-empirical model describing the solubility of Cr 2 O 3 was developed. The standard deviation between calculated and experimental data is 10 pm (ca 2.4 pct).
ISSN:1073-5615
1543-1916
DOI:10.1007/s11663-012-9788-2