EXAFS study of yttria stabilized cubic zirconia

✍ Scribed by B.W. Veal; A.G. McKale; A.P. Paulikas; S.J. Rothman; L.J. Nowicki

• Publisher: Elsevier Science
• Year: 1988
• Weight: 508 KB
• Volume: 150
• Category: Article
• ISSN: 0378-4363
• DOI: 10.1016/0378-4363(88)90127-1

✦ Synopsis

EXAFS (Extended X-ray Absorption Fine Structure) studies of cubic (ZrOz)l_x(Y203) x are reported for the concentration range 0.09 < x < 0.4. When the trivalent Y ions are substituted for the tetravalent Zr ions, 02-vacancies are also introduced for charge compensation. However, the distribution of the 02-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 02 vacancy content, is varied. It is observed that oxygen vacancies occur adjacent to both Y and Zr ions but preferentially in proximity to Zr.