TEM and ED confirmation of conversion of 3D and 2D perovskite-type into fluorite-type structure

Surinderjit Singh Bhella, Tobias Fürstenhaupt, Venkataraman Thangadurai*

*Corresponding author for this work

Research output: Contribution to journalLetterpeer-review

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 languageEnglish
Pages (from-to)L5-L8
JournalJournal of Alloys and Compounds
Volume503
Issue number1
DOIs
Publication statusPublished - 30 Jul 2010

Keywords

  • Electron diffraction
  • High-resolution transmission electron microscopy
  • Metastable fluorites
  • Solid-gas phase synthesis
  • Y)

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