Calorimetric investigations on stoichiometric barium and uranium oxides

Heat capacities and enthalpy increments of barium uranates: BaU 2O 7(s), Ba 2U 3O 11(s), Ba 2.875UO 5.875(s) and Ba 3UO 6(s) were measured using a differential scanning calorimeter and a high-temperature Calvet calorimeter. The heat capacities and enthalpy increments were measured in the temperature...

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Bibliographic Details
Published in:Journal of nuclear materials 2010-09, Vol.404 (1), p.9-18
Main Authors: Dash, Smruti, Singh, Ziley
Format: Article
Language:English
Subjects:
Applied sciences
Controled nuclear fusion plants
Energy
Energy of formation
Energy use
Energy. Thermal use of fuels
Enthalpy
Entropy
Exact sciences and technology
Fission nuclear power plants
Fuels
Heat capacity
Installations for energy generation and conversion: thermal and electrical energy
Mathematical analysis
Mathematical models
Nuclear fuels
Specific heat
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Summary:Heat capacities and enthalpy increments of barium uranates: BaU 2O 7(s), Ba 2U 3O 11(s), Ba 2.875UO 5.875(s) and Ba 3UO 6(s) were measured using a differential scanning calorimeter and a high-temperature Calvet calorimeter. The heat capacities and enthalpy increments were measured in the temperature range 126–304 K and 299–1011 K, respectively. A set of self consistent thermodynamic functions such as entropy, Gibbs energy function, heat capacity and Gibbs energy and enthalpy of formation values for BaU 2O 7(s), Ba 2U 3O 11(s), Ba 2.875UO 5.875(s) and Ba 3UO 6(s) have been computed for the first time using the data obtained in the present study and other available experimental data.
ISSN:0022-3115
1873-4820
DOI:10.1016/j.jnucmat.2010.06.019