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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

Published online by Cambridge University Press:  20 February 2018

R. Newman
Affiliation:
Imperial College, London, UK
R.D. Aughterson
Affiliation:
Australian Nuclear Science and Technology Organisation
G.R. Lumpkin*
Affiliation:
Australian Nuclear Science and Technology Organisation
*
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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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Articles
Copyright
Copyright © Materials Research Society 2018 

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