Mg. Barker et al., THE REACTION OF LIQUID-SODIUM WITH THE OXIDES CEO2 AND CE2O3 AND THE DETERMINATION OF THE FREE-ENERGY OF FORMATION OF NACEO2 AND NA2CEO3, Journal of nuclear materials, 218(2), 1995, pp. 256-260
Citations number
12
Categorie Soggetti
Nuclear Sciences & Tecnology","Mining & Mineral Processing","Material Science
The sodium-cerium ternary oxides NaCeO2 and Na2CeO3 have been shown to
be stable in liquid sodium. Their free energies of formation have bee
n measured by emf methods and follow the equations Delta G(f) degrees(
NaCeO2) = -1121687 + 219.71T Jmol(-1), Delta G(f) degrees(Na2CeO3) = -
1551941 + 341.64T Jmol(-1). At 873 K Na2CeO3 requires high oxygen leve
ls in the sodium for it to be formed but NaCeO2 will form from Ce2O3 a
nd sodium at reactor operating oxygen levels. The oxide CeO2 has been
shown to react with liquid sodium at 625 K forming the ternary oxide N
aCeO2 and the heat of reaction has been measured.