Thermodynamics Research Center / ThermoML | Thermochimica Acta

Heat capacity measurements on uranium cerium mixed oxides by differential scanning calorimetry

Venkata Krishnan, R., Nagarajan, K.
Thermochim. Acta 2006, 440, 2, 141-145
ABSTRACT
Uranium cerium mixed oxides of three different compositions (U0.2Ce0.8)O2, (U0.5Ce0.5)O2 and (U0.8Ce0.2)O2, were prepared by combustion synthesis and characterized by XRD. The compositional characterization was done by ICP-AES. Heat capacity measurements employed a heat flux type differential scanning calorimeter from 280 to 820 K. The heat capacity values of (U0.2Ce0.8)O2, (U0.5Ce0.5)O2 and (U0.8Ce0.2)O2 at 298K are 62.8, 64.2 and 70.1 JK-1 mol-1, respectively. Enthalpy increment, entropy and Gibbs energy function were computed from the heat capacity data.
Compounds
# Formula Name
1 CeO2 ceric oxide
2 O2U uranium dioxide
Datasets
The table above is generated from the ThermoML associated json file (link above). POMD and RXND refer to PureOrMixture and Reaction Datasets. The compound numbers are included in properties, variables, and phases, if specificied; the numbers refer to the table of compounds on the left.
Type Compound-# Property Variable Constraint Phase Method #Points
  • POMD
  • 1
  • 2
  • Molar heat capacity at constant pressure, J/K/mol ; Crystal
  • Mole fraction - 2; Crystal
  • Temperature, K; Crystal
  • Pressure, kPa; Crystal
  • Crystal
  • Small sample (50 mg) DSC
  • 35