Answers are grounded in this paper and cite their sources.
Static lattice simulation techniques were used to examine the effect of strain on oxygen-vacancy migration in the fluorite-structured oxygen-ion conducting electrolyte CeO2. Activation energies for vacancy migration, ΔEmig, were calculated as a function of isotropic and biaxial strain. In both cases, significant modification of the energetic barriers for oxygen-vacancy migration was found. Analysis of the data yields the activation volumes, ΔVmig, and activation enthalpies, ΔHmig. Simple comparisons based on the calculated data suggest that a biaxial, tensile strain of 4% may increase the in-plane conductivity at T = 500 K by close to four orders of magnitude. Enhancement of the oxygen-ion conductivity of an oxide heterostructure through space-charge effects is also discussed.
No takes yet. Share an insight, caveat, or question.
Souza et al. (2011) studied this question.
Synapse has enriched 10 related papers. Consider them for comparative context: