Optimized structure and valence-electron density of tetragonal ceria-zirconia solid solutions

5 Structural Disorder and Diffusion Pathways of Oxide Ions in Ceria-Zirconia and Ceria-Rare-Earth Oxide Solid Solutions 

X-ray powder diffractometry has enabled the visualization of the structural disorder and diffusional pathway of mobile ions in various ionic conductors. Classical Rietveld analysis is able to refine the atomic displacement parameters, which describe the static and dynamic 

1 Structural disorder and diffusion of oxide ions in Ce ri j02 solid solutions 

Diffusion of oxide ions is an important step in the oxygen storage/ release process of ceria-based catalysts. We investigated the crystal structure and structural disorder of compositionally homogeneous Ce Zri. 02 and CeOg by synchrotron and neutron powder dififrac-tometry, the Rietveld method, and The isotropic 

F ure 1.29 Relation between the isotropic atomic displacement parameter of O atoms U 0) and the diffusion coefficient of O atoms in solid solutions.  

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