Abstract
The thermal and mechanical properties of cerium dioxide (CeO2) were assessed using a range of experimental techniques. The oxygen potential of CeO2 was measured by the thermogravimetric technique, and a numerical fit for the oxygen potential of CeO2 is derived based on defect chemistry. Mechanical properties of CeO2 were obtained using sound velocity measurement, resonant ultrasound spectroscopy and nanoindentation. The obtained mechanical properties of CeO2 are then used to evaluate the Debye temperature and Grüneisen constant. The heat capacity and thermal conductivity of CeO2 were also calculated using the Debye temperature and the Grüneisen constant. Finally, the thermal conductivity was calculated based upon laser flash analysis measurements performed on pellets fabricated using a range of feedstock purities to resolve discrepancies in the existing literature.
| Original language | English |
|---|---|
| Pages (from-to) | 1994-2008 |
| Number of pages | 15 |
| Journal | Journal of the American Ceramic Society |
| Volume | 102 |
| Issue number | 4 |
| DOIs | |
| State | Published - Apr 2019 |
| Externally published | Yes |
Funding
The authors wish to thank John Dunwoody for assistance in sample preparation, as well as Beth Judge and Keri Campbell for assistance in performing the feedstock impurity analyses presented here. Portions of this work were supported by the U.S. Department of Energy, Office of Nuclear Energy's Nuclear Technology Research and Development Program. Portions of the research presenting in this manuscript was supported by the Laboratory Directed Research and Development program under project 20170531ER. Research performed at Los Alamos National Laboratory is supported by the U.S. Department of Energy National Nuclear Security Administration under Contract No. DE-AC52-06NA25396. The authors wish to thank John Dunwoody for assistance in sample preparation, as well as Beth Judge and Keri Campbell for assistance in performing the feedstock impurity analyses presented here. Portions of this work were supported by the U.S. Department of Energy, Office of Nuclear Energy's Nuclear Technology Research and Development Program. Portions of the research presenting in this manuscript was supported by the Laboratory Directed Research and Development program under project 20170531ER. Research performed at Los Alamos National Laboratory is supported by the U.S. Department of Energy National Nuclear Security Administration under Contract No. DE‐AC52‐06NA25396.
Keywords
- cerium dioxide
- elastic properties
- heat capacity
- nuclear materials
- oxygen potential
- thermal conductivity