Studying oxygen vacancies in ceramics by perturbed angular correlation spectroscopy

Technical Report · Mon Jan 01 04:00:00 EST 1990

DOI:https://doi.org/10.2172/6449941· OSTI ID:6449941

Su, Han-Tzong; Wang, Ruiping; Fuchs, H; Gardner, J A ^[1]; Evenson, W E ^[2]; Sommers, J A ^[3]

---

1. Oregon State Univ., Corvallis, OR (USA). Dept. of Physics
2. Brigham Young Univ., Provo, UT (USA). Dept. of Physics
3. Teledyne-Wah Chang, Albany, OR (USA)

Perturbed angular correlation measurements in tetragonal and cubic zirconia and in ceria are described. A physically reasonable and self-consistent interpretation of these data implies that oxygen vacancies are trapped at a second neighbor position by Cd in tetragonal zirconia and by In in ceria. For Cd in tetragonal zirconia, the vacancy trap energy is found to be 0.44 eV, and the energy barrier between adjacent trap sites is approximately 0.8 eV. The activation energy of an oxygen vacancy hopping between trap sites around {sup 111}Cd in ceria is found to be 0.55 eV. The activation energy for oxygen vacancy hopping in cubic zirconia, as detected by {sup 181}Ta PAC, is about 1.0 eV and independent of the Y concentration. 12 refs., 4 figs.

• Research Organization: Oregon State Univ., Corvallis, OR (USA). Dept. of Physics
• Sponsoring Organization: DOE/ER
• DOE Contract Number: FG06-85ER45191
• OSTI ID: 6449941
• Report Number(s): DOE/ER/45191-15; ON: DE91005568
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360204* -- Ceramics
Cermets
& Refractories-- Physical Properties
656002 -- Condensed Matter Physics-- General Techniques in Condensed Matter-- (1987-)
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ACTIVATION ENERGY
ANGULAR CORRELATION
CADMIUM 111
CADMIUM ISOTOPES
CERAMICS
CERIUM COMPOUNDS
CERIUM OXIDES
CHALCOGENIDES
CORRELATIONS
CRYSTAL DEFECTS
CRYSTAL STRUCTURE
ELEMENTS
ENERGY
EVEN-ODD NUCLEI
HEAVY NUCLEI
INTERMEDIATE MASS NUCLEI
INTERNAL CONVERSION RADIOISOTOPES
ISOMERIC TRANSITION ISOTOPES
ISOTOPES
MINUTES LIVING RADIOISOTOPES
NONMETALS
NUCLEI
ODD-EVEN NUCLEI
OXIDES
OXYGEN
OXYGEN COMPOUNDS
PERTURBED ANGULAR CORRELATION
POINT DEFECTS
RADIOISOTOPES
RARE EARTH COMPOUNDS
SPECTROSCOPY
STABLE ISOTOPES
TANTALUM 181
TANTALUM ISOTOPES
TRANSITION ELEMENT COMPOUNDS
TRAPS
VACANCIES
ZIRCONIUM COMPOUNDS
ZIRCONIUM OXIDES