Abstract
EXAFS (Extended X-ray Absorption Fine Structure) studies of cubic (ZrO 2) 1− x (Y 2O 3) x are reported for the concentration range 0.09< x<0.4. When the trivalent Y ions are substituted for the tetravalent Zr ions, O 2− vacancies are also introduced for charge compensation. However, the distribution of the O 2− vacancies in the structure is not known. In this EXAFS study, systematics of disorder and vacancy distribution on the oxygen sublattice are monitored from both the Zr and Y sites as Y, and hence O 2− vacancy content, is varied. It is observed that oxygen vacancies occur adjacent to both Y and Zr ions but preferentially in proximity to Zr.
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