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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 ,
R.D. Aughterson  and
G.R. Lumpkin
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
*
*(Email: grl@ansto.gov.au)
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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.

Keywords

ceramicchemical compositioncrystallographic structure
Type
Articles
Information
MRS Advances , Volume 3 , Issue 20: Scientific Basis for Nuclear Waste Management XLI , 2018 , pp. 1117 - 1122
Copyright
Copyright © Materials Research Society 2018 

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References

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