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https://open.uns.ac.rs/handle/123456789/6062
Title: | Mechanosynthesis and structural characterization of nanocrystalline Ce<inf>1-x</inf>Y<inf>x</inf>O<inf>2-δ</inf> (x=0.1-0.35) solid solutions | Authors: | Fabián M. Antić, Boris Girman V. Vučinić-Vasić, Milica Kremenović A. Suzuki S. Hahn H. Šepelák V. |
Issue Date: | 3-Jul-2015 | Journal: | Journal of Solid State Chemistry | Abstract: | © 2015 Published by Elsevier Inc. 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. | URI: | https://open.uns.ac.rs/handle/123456789/6062 | ISSN: | 224596 | DOI: | 10.1016/j.jssc.2015.06.027 |
Appears in Collections: | FTN Publikacije/Publications |
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