Mechanosynthesis and structural characterization of nanocrystalline Ce1-xYxO2-δ (x=0.1-0.35) solid solutions

Martin Fabián, Bratislav Antić, Vladimír Girman, Milica Vučinić-Vasić, Aleksandar Kremenović, Shigeru Suzuki, Horst Hahn, Vladimír Šepelák

Research output: Contribution to journalArticlepeer-review

15 Citations (Scopus)

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 languageEnglish
Article number18954
Pages (from-to)42-48
Number of pages7
JournalJournal of Solid State Chemistry
Volume230
DOIs
Publication statusPublished - 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

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