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Synthesis and Characterisation of Ln2TiO5 Compounds

Published online by Cambridge University Press:  01 February 2011

Robert D. Aughterson
Affiliation:
Institute of Materials Engineering, ANSTO, Private Mail Bag 1, Menai 2234, NSW, Australia
Gregory R. Lumpkin
Affiliation:
Institute of Materials Engineering, ANSTO, Private Mail Bag 1, Menai 2234, NSW, Australia
Katherine L. Smith
Affiliation:
Institute of Materials Engineering, ANSTO, Private Mail Bag 1, Menai 2234, NSW, Australia
Gordon J. Thorogood
Affiliation:
Institute of Materials Engineering, ANSTO, Private Mail Bag 1, Menai 2234, NSW, Australia
Karl R. Whittle
Affiliation:
Institute of Materials Engineering, ANSTO, Private Mail Bag 1, Menai 2234, NSW, Australia Department of Engineering Materials, University of Sheffield, Sheffield, S1 3JD, UK
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Abstract

Bulk samples of six Ln2TiO5 compounds with Ln = La, Pr, Nd, Eu, Gd and Tb were prepared and characterised. Most of the samples have a phase purity of ∼95% (based on BEI and EDS) with the predominant secondary phase primarily being Ln2Ti2O7. Using XRD, TEM selected area diffraction and high resolution imaging techniques, we have confirmed the results of previous studies which showed that at room temperature Pr2TiO5, Nd2TiO5, Eu2TiO5 and Tb2TiO5 have orthorhombic structures with Pnma symmetry. The structure of Tb2TiO5 was further monitored as a function of temperature. The relevance of Ln2TiO5 compounds to advanced nuclear fuel cycles is discussed.

Type
Research Article
Copyright
Copyright © Materials Research Society 2008

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