Structural characterization of nano-sized Ce 0.5 Ln 0.5 O 1.75 (Ln = Yb, Lu) mixed oxides.
This work presents results of HRTEM and XRD studies on microstructure of ceria-based mixed oxides subjected to high-temperature heat treatment in air. Nano-sized (4-5 nm) crystallites of Ce(0.5)Ln(0.5)O(1.75) oxides (Ln = Yb, Lu) with narrow size distribution were prepared by a microemulsion method (W/O). Presence of an intermediate cubic phase, with oxygen vacancy ordering, was found for the Ce(0.5)Ln(0.5)O(1.75) mixed oxides. A simple model of the intermediate phase has been proposed and tested.
Małecka
M A
MA
Institute of Low Temperature and Structure Research, Polish Academy of Sciences, Wrocław, Poland.
Kepiński
L
L