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Title: Cerium Neodymium Oxide Solid Solution Synthesis as a Potential Analogue for Substoichiometric AmO2 for Radioisotope Power Systems
Authors: Watkinson, E. J.
Ambrosi, R. M.
Williams, H. R.
Sarsfield, M. J.
Stephenson, K.
Weston, D.
Marsh, N.
Haidon, C.
First Published: 10-Jan-2017
Publisher: Elsevier for North-Holland Publishing
Citation: Journal of Nuclear Materials 486 (2017) 308-322
Abstract: The European Space Agency (ESA) is sponsoring a research programme on the development of americium oxides for radioisotope generators and heater units. Cubic AmO2-(x/2) with an O/Am ratio between 1.65 and 1.75 is a potentially suitable compound for pellet sintering. C-type (Ia-3) Ce1-xNdxO2-(x/2) oxides with 0.5 < x < 0.7 could be used as a surrogate for some Ia-3 AmO2-(x/2). A new Ce1-xNdxO2-(x/2) production process has been investigated where a nominally selected x value of 0.6 was targeted: Ce and Nd nitrates and oxalic acid were added drop-wise into a vessel, where they continuously reacted to create oxalate precipitates. The effect of temperature (25 C, 60 C) of the reactants (mixed at 250 revolutions per minute) on oxalate particle shape and size were investigated. Oxalates were calcined at 900 C to produce oxide particles. Oxalate particle properties were characterised as these are expected to influence oxides particle properties and fuel pellet sintering.
DOI Link: 10.1016/j.jnucmat.2017.01.011
ISSN: 0022-3115
Version: Post-print
Status: Peer-reviewed
Type: Journal Article
Rights: Creative Commons “Attribution Non-Commercial No Derivatives” licence CC BY-NC-ND, further details of which can be found via the following link: Archived with reference to SHERPA/RoMEO and publisher website.
Description: 12 month embargo
Appears in Collections:Published Articles, Dept. of Physics and Astronomy

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