Abstract
Nanopowders of solid solutions with different compositions are prepared in the zirconia-enriched region of the ZrO2-CeO2 system. The crystallization of these powders and the formation of the monoclinic, cubic, and tetragonal solid solutions of the composition (Zr1 − xCex)O2 are investigated. It is found that the unit cell parameters of the solid solutions increase as the cerium content increases. This confirms the fact that cerium ions [r(Ce4+) = 1.11 A] substitute for zirconium ions [r(Zr4+) = 0.98 A] in these solid solutions. The average size of crystallites of the solid solutions under investigation increases from 5 to 60 nm in the temperature range 500–1200°C.
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