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Metallurgical and Materials Transactions B

Published in:

01-04-2013

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

Authors: Dáša Šuleková, Vladimir Danielik, Pavel Fellner, Jomar Thonstad

Published in: Metallurgical and Materials Transactions B | Issue 2/2013

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Abstract

The solubility of Cr(III) species originating from dissolution of Cr₂O₃ 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(AlF₃) 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(AlF₃), high ratios resulting in higher solubility. A semi-empirical model describing the solubility of Cr₂O₃ was developed. The standard deviation between calculated and experimental data is 10 pm (ca 2.4 pct).

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V. Danielik, P. Fellner, D. Šuleková and J. Thonstad: J. Electrochem. Soc., 2012, vol. 159(2), pp. C86-C89.CrossRef

Å. Sterten, O. Skar (1988) Aluminium 64:1051.

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Q.B. Diep: Thesis, NTNU, Trondheim, Norway, 1998.

H.H. Landolt and R. Börnstein (1999) Thermodynamic Properties of Inorganic Material Part 1, Scientific Group Thermodata Europe (SGTE). Springer, Berlin.

A. Solheim, S. Rolseth, E. Skybakmoen, L. Støen, Å. Sterten and T. Støre: TMS Light Met., 1995, p. 451.

Title: Solubility of Chromium(III) Oxide in the Molten Cryolite System
Authors: Dáša Šuleková
Vladimir Danielik
Pavel Fellner
Jomar Thonstad
Publication date: 01-04-2013
Publisher: Springer US
Published in: Metallurgical and Materials Transactions B / Issue 2/2013
Print ISSN: 1073-5615
Electronic ISSN: 1543-1916
DOI: https://doi.org/10.1007/s11663-012-9788-2

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