Abstract
The main colloid-chemical properties have been determined for Ce0.5Zr0.5O2 hydrosols, the particles of which consist of a solid solution of cerium and zirconium dioxides. It has been shown that these hydrosols have aggregative stability close to that of ZrO2 hydrosols, although their particles contain 50 mol % cerium dioxide, which is less hydrophilic than zirconium dioxide. The sizes, densities, phase compositions, and electrokinetic potentials of the particles have been determined at different pH values of a dispersion medium. The spontaneous dispersion of xerogels obtained by hydrosol drying has been studied. The thickness of the particle surface layer that provides the hydrosols with aggregative stability has been determined. It has been inferred from the data obtained that an ionized hydrated gel layer is present on the surface of the sol particles.
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