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Article

High Pressure Brillouin Spectroscopy and X-ray Diffraction of Cerium Dioxide

1
SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo Park, CA 94025, USA
2
Los Alamos National Laboratory, P.O. BOX 1663, Los Alamos, NM 87545, USA
3
Center for Advanced Radiation Sources, University of Chicago, Chicago, IL 60637, USA
4
Department of Geological Sciences, Stanford University, Stanford, CA 94305, USA
*
Author to whom correspondence should be addressed.
Academic Editor: Jose Antonio Alonso
Materials 2021, 14(13), 3683; https://doi.org/10.3390/ma14133683
Received: 3 June 2021 / Revised: 21 June 2021 / Accepted: 27 June 2021 / Published: 1 July 2021
(This article belongs to the Special Issue Materials Behavior under Compression)
Simultaneous high-pressure Brillouin spectroscopy and powder X-ray diffraction of cerium dioxide powders are presented at room temperature to a pressure of 45 GPa. Micro- and nanocrystalline powders are studied and the density, acoustic velocities and elastic moduli determined. In contrast to recent reports of anomalous compressibility and strength in nanocrystalline cerium dioxide, the acoustic velocities are found to be insensitive to grain size and enhanced strength is not observed in nanocrystalline CeO2. Discrepancies in the bulk moduli derived from Brillouin and powder X-ray diffraction studies suggest that the properties of CeO2 are sensitive to the hydrostaticity of its environment. Our Brillouin data give the shear modulus, G0 = 63 (3) GPa, and adiabatic bulk modulus, KS0 = 142 (9) GPa, which is considerably lower than the isothermal bulk modulus, KT0 230 GPa, determined by high-pressure X-ray diffraction experiments. View Full-Text
Keywords: cerium dioxide; ceria; high pressure; diamond anvil cell; brillouin spectroscopy cerium dioxide; ceria; high pressure; diamond anvil cell; brillouin spectroscopy
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MDPI and ACS Style

Frost, M.; Lazarz, J.D.; Levitan, A.L.; Prakapenka, V.B.; Sun, P.; Tkachev, S.N.; Yang, H.; Glenzer, S.H.; Gleason, A.E. High Pressure Brillouin Spectroscopy and X-ray Diffraction of Cerium Dioxide. Materials 2021, 14, 3683. https://doi.org/10.3390/ma14133683

AMA Style

Frost M, Lazarz JD, Levitan AL, Prakapenka VB, Sun P, Tkachev SN, Yang H, Glenzer SH, Gleason AE. High Pressure Brillouin Spectroscopy and X-ray Diffraction of Cerium Dioxide. Materials. 2021; 14(13):3683. https://doi.org/10.3390/ma14133683

Chicago/Turabian Style

Frost, Mungo, John D. Lazarz, Abraham L. Levitan, Vitali B. Prakapenka, Peihao Sun, Sergey N. Tkachev, Hong Yang, Siegfried H. Glenzer, and Arianna E. Gleason 2021. "High Pressure Brillouin Spectroscopy and X-ray Diffraction of Cerium Dioxide" Materials 14, no. 13: 3683. https://doi.org/10.3390/ma14133683

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