Cerium Oxide Based Nanometric Powders: Synthesis and Characterization

Nanometric powders of solid solutions of cerium ox ide were obtained by a modified glycine nitrate procedure. Solid solutions of the h ost compound CeO 2 with one or more dopants in the lattice were synthesized. Rare earth cations (Re = Yb, Gd and Sm) were added to ceria in total concentration of x = 0.2 that was kept constant. The criterion in doping was to keep the value of lattice parameter of ceria unc hanged. The lattice parameters were calculated by using the model that takes into accou nt the existence of oxygen vacancies in the structure.