| Numéro |
J. Phys. Colloques
Volume 42, Numéro C5, Octobre 1981
ICIFUAS-7Seventh International Conference on Internal Friction and Ultrasonic Attenuation in Solids |
|
|---|---|---|
| Page(s) | C5-823 - C5-828 | |
| DOI | https://doi.org/10.1051/jphyscol:19815128 | |
ICIFUAS-7
Seventh International Conference on Internal Friction and Ultrasonic Attenuation in Solids
J. Phys. Colloques 42 (1981) C5-823-C5-828
DOI: 10.1051/jphyscol:19815128
1 Exxon Corporate Research Laboratories, Linden, N.J.
2 Henry Krumb School of Mines, Columbia University, New York, New York 10027, U.S.A.
Seventh International Conference on Internal Friction and Ultrasonic Attenuation in Solids
J. Phys. Colloques 42 (1981) C5-823-C5-828
DOI: 10.1051/jphyscol:19815128
RELAXATION PEAKS PRODUCED BY DEFECT COMPLEXES IN CERIUM DIOXIDE DOPED WITH TRIVALENT CATIONS
M.P. Anderson1 et A.S. Nowick21 Exxon Corporate Research Laboratories, Linden, N.J.
2 Henry Krumb School of Mines, Columbia University, New York, New York 10027, U.S.A.
Abstract
Cerium dioxide doped with Y3+ ions, which is of interest for its ionic conductivity, is here studied by anelastic methods. The internal friction peaks observed are analyzed into peaks A, B, C (with Hr = 0.64, 0.71 and 0.78 eV, respectively). Peak A, present at low Y3+ concentrations is established to be due to a YV Pair (V = oxygen-ion vacancy), which is a charged defect compensated by an isolated Y. Peak B is believed to be due to a Y2V complex with the Y-Y pair in the (1,0,0) conf iguration. For this defect, only relaxations involving the V motion are observable, giving an exanple of the "frozen-free split" phenomenon.