Abstract
Abstract A series of nanostructured fluorite-type Ce1-xYxO2-δ (0≤x≤0.35) solid solutions, prepared via high-energy milling of the CeO2/Y2O3 mixtures, are investigated by XRD, HR-TEM, EDS and Raman spectroscopy. For the first time, complementary information on both the long-range and short-range structural features of mechanosynthesized Ce1-xYxO2-δ, obtained by Rietveld analysis of XRD data and Raman spectroscopy, is provided. The lattice parameters of the as-prepared solid solutions decrease with increasing yttrium content. Rietveld refinements of the XRD data reveal increase in microstrains in the host ceria lattice as a consequence of yttrium incorporation. Raman spectra are directly affected by the presence of oxygen vacancies; their existence is evidenced by the presence of vibration modes at ~560 and ~600 cm-1. The detailed spectroscopic investigations enable us to separate extrinsic and intrinsic origin of oxygen vacancies. It is demonstrated that mechanosynthesis can be successfully employed in the one-step preparation of nanocrystalline Ce1-xYxO2-δ solid solutions.
Original language | English |
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Article number | 18954 |
Pages (from-to) | 42-48 |
Number of pages | 7 |
Journal | Journal of Solid State Chemistry |
Volume | 230 |
DOIs | |
Publication status | Published - 2015 Jul 3 |
Keywords
- Ceria
- Mechanosynthesis
- Nanocrystalline material
- Oxygen vacancy
- Solid solution
- Yttrium
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Ceramics and Composites
- Condensed Matter Physics
- Physical and Theoretical Chemistry
- Inorganic Chemistry
- Materials Chemistry