Abstract
The oxygen non-stoichiometry (δ) for M0.1Ce0.9O1.95-δ (M = La, Yb, and Y), Ca0.1Ce0.9O1.9-δ, and undoped ceria are reported at 800 oC and compared with literature results for undoped and Gd doped ceria. Reducibility shows an increasing trend with increasing amount of oxygen vacancies introduced by the dopant. The stoichiometric expansion coefficient for the Yb, Y, and Ca doped samples was evaluated and found to be approximately equal and within the range typically found for ceria. A clear dependence of stoichiometric expansion coefficient on ionic radius or oxygen vacancy concentration was not observed.
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