Comparative study of thermal decomposition of the sol–gel products of U and Ce by external and internal gelation processes

Fabrication of Nd- and Ce-doped uranium dioxide microspheres via internal gelation

“…However, one of the most stable plutonium oxidation states is Pu IV (r CN8 = 0.97 Å) and Ce as surrogate has the benefit of being used as Ce IV (r CN8 = 0.96 Å). Suresh Kumar et al [5] tested the IG process for the production of bulk Ce-doped ammonium diuranate (ADU) gels, using Ce III as dopant precursor. Moreover, IG studies to prepare CeO 2 particles are available in literature, they use Ce IV solution, pre-neutralised with NH 3 solution, as metal precursor [6][7][8][9].…”

Cation-heterogeneity in internally gelated U1-Ce O2-, 0.15 ≤ z ≤ 0.3 microspheres

“…Many studies working with internal gelation have assumed, e.g. [58], categorical homogeneity for (U,Ln)O2 IGMS systems but a deviation from a perfect solid solution seems to be possible under a combination of process parameters which were not within the scope of this work. Furthermore such deviations can easily be missed without a careful analysis of the XRD pattern at high 2 angles and the type of detailed internal elemental distribution analysis presented in this work.…”