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High-temperature mass spectrometric study of the thermodynamic properties of the DyF3–Dy2O3 system

✍ Scribed by V. L. Stolyarova; S. Seetharaman

Publisher
John Wiley and Sons
Year
1998
Tongue
English
Weight
169 KB
Volume
12
Category
Article
ISSN
0951-4198

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✦ Synopsis

The high-temperature Knudsen effusion method was used to study partial pressures of vapour species, activities of components and the Gibbs free energies in the DyF 3 -Dy 2 O 3 system at the temperature (1357 AE 5) K. Partial pressures of the vapour species were obtained by the ion current comparison method, with the DyF 3 partial vapour pressure over pure DyF 3 as a standard. The equilibrium constant of the gaseous reaction DyF 3 DyOF = Dy 2 OF 4 was evaluated. Thermodynamic data obtained are in a agreement with the available phase diagram of the DyF 3 -Dy 2 O 3 system. Results of the present study illustrate the negative deviations from the ideal behaviour in the system.

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