Preparation and Properties of Uniform Mixed Colloidal Particles: VI, Copper(II)-yttrium(III), and Copper(II)-lanthanum(III) Compounds.

摘要

Uniform spherical colloidal particles of mixed internal composition were obtained by aging at 90 C solutions containing Copper Nitrate + Yttrium Nitrate and Copper Nitrate + Lanthanum Nitrate respectively, in the presence of urea. The molar ratio of metal ions in the solids precipitated from a given solution varied with the reaction time. After sufficiently long aging, this ratio corresponded closely to that in solutions in which the particles were generated. The original precipitates consisted of basic carbonates, which on calcination converted to mixed oxides of defined composition. Reprints. (AW)