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Synthesis and Structure of Novel A2BO5 Compounds Containing A = Y, Yb, Gd, Sm, and La and B = Zr, Ti, and Sn

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Abstract

With the aim of creating novel ceramics for applications in nuclear materials with high radiation tolerance, multiple samples with A-B-O stoichiometries ranging from 215 to 227 were synthesized and characterized by a combination of SEM, XRD, and TEM methods. Single-phase defect-fluorite-type compounds with A = Sm or Yb and B = Ti, Zr, and/or Sn are reported; whereas, pyrochlore structured compounds and lanthanide sesquioxide phases were found as major phases in numerous samples. A series of Y-b-Sn-O samples was successfully prepared as nearly single phase or single phase materials. These are essentially defect fluorites with extra weak peaks, most likely due to X-ray scattering from oxygen or oxygen and metal cations. We describe some interesting TEM data and describe selected area diffraction patterns with complex modulations.

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Authors and Affiliations

  1. Imperial College, London, UK

    R. Newman

  2. Australian Nuclear Science and Technology Organisation, Australia

    R. D. Aughterson & G. R. Lumpkin

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  1. R. Newman
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  2. R. D. Aughterson
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  3. G. R. Lumpkin
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Newman, R., Aughterson, R.D. & Lumpkin, G.R. Synthesis and Structure of Novel A2BO5 Compounds Containing A = Y, Yb, Gd, Sm, and La and B = Zr, Ti, and Sn. MRS Advances 3, 1117–1122 (2018). https://doi.org/10.1557/adv.2018.210

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  • DOI: https://doi.org/10.1557/adv.2018.210

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