| Issue |
J. Phys. Colloques
Volume 47, Number C8, Décembre 1986
EXAFS and Near Edge Structure IV
|
|
|---|---|---|
| Page(s) | C8-725 - C8-728 | |
| DOI | https://doi.org/10.1051/jphyscol:19868136 | |
EXAFS and Near Edge Structure IV
J. Phys. Colloques 47 (1986) C8-725-C8-728
DOI: 10.1051/jphyscol:19868136
1 Brookhaven National Laboratory, Upton, NY 11973, U.S.A.
2 Department of Physics, North Carolina State University, Raleigh NC 27695-8202, U.S.A.
J. Phys. Colloques 47 (1986) C8-725-C8-728
DOI: 10.1051/jphyscol:19868136
THE DEFECT STRUCTURE OF CALCIA STABILISED ZIRCONIA
L.M. MORONEY1 et D.E. SAYERS21 Brookhaven National Laboratory, Upton, NY 11973, U.S.A.
2 Department of Physics, North Carolina State University, Raleigh NC 27695-8202, U.S.A.
Abstract
EXAFS data comparing the local structural environments of the calcium and zirconium ions in calcia-stabilised zirconia are presented. The Zr data resembles that observed previously for yttria-stabilised zirconia with the zirconium ions tending to be displaced from their centrosymmetric sites and a Zr-O distance of 2.12 Å. These similarities suggest that anion vacancies in this material are also to be found adjacent to Zr4+. The calcium ions are not displaced from their lattice sites but their immediate anion neighbours are highly disordered resulting in at least two Ca-O distances in the radial distribution of the nearest neighbour shell.