Synthesis of nanodisperse powders oxides of cerium, yttrium and gadolinium

The article discusses the technology of obtaining nanodisperse powders of cerium, yttrium and gadolinium oxides. The process is based on the precipitation of carbonates from (REM) nitrates and their thermal decomposition. It was found that the particle sizes of nanodispersed REM oxide powders depend on the concentration of the initial nitrate solution of the rare earth metal, the speed of the carbonate deposition process, as well as the parameters of its thermal decomposition – temperature and time. The rapid and uniform supply of the precipitator in this work was realized by injecting a solution of (NH 4 ) 2 CO 3 into a constantly stirring reaction mass. The optimal heat treatment temperature was selected for each of the oxides. As a result of the work, kilogram batches of nanoscale powders of cerium, yttrium and gadolinium oxides with particle sizes in the range from 15 to 30 nm were obtained, the single-phase nature of which was confirmed by X-ray phase analysis data, and the particle sizes were determined using transmission electron microscopy.