Abstract
In this paper, we confirm the transformation of three-dimensional (3D) In-doped perovskite-like BaCe1-xInxO3-δ (x = 0.1; 0.2) and layered (two-dimensional) perovskite-related Sr 2Ce1-xYxO4-δ (x = 0.1; 0.2) into corresponding fluorite-type Ce1-xMxO 2-δ (M = In, Y) under CO2 mediated reaction at elevated temperature, respectively, using high-resolution transmission electron microscopy (HRTEM) and electron diffraction (ED) studies. HRTEM images confirmed expected nano-sized materials and ED study showed the formation of a single-phase fluorite-type CeO2 structure and absence of ED patterns resulting from the perovskite-like precursors and potential reaction by-products such as In2O3 and Y2O3 after the CO2 reaction, which is consistent with ex situ and in situ powder X-ray diffraction (PXRD), and strongly support the proposed structural transformation reactions.
Original language | English |
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Pages (from-to) | L5-L8 |
Journal | Journal of Alloys and Compounds |
Volume | 503 |
Issue number | 1 |
DOIs | |
Publication status | Published - 30 Jul 2010 |
Keywords
- Electron diffraction
- High-resolution transmission electron microscopy
- Metastable fluorites
- Solid-gas phase synthesis
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