期刊
JOURNAL OF NUCLEAR MATERIALS
卷 486, 期 -, 页码 308-322出版社
ELSEVIER
DOI: 10.1016/j.jnucmat.2017.01.011
关键词
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资金
- Science and Technologies Facilities Council [ST/K/502121/1]
- European Space Agency [TEC-EPS/2009/531, E903-001EP]
- Science and Technology Facilities Council [1362737] Funding Source: researchfish
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 la-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 degrees C, 60 degrees C) of the reactants (mixed at 250 revolutions per minute) on oxalate particle shape and size were investigated. Oxalates were calcined at 900 degrees C to produce oxide particles. Oxalate particle properties were characterised as these are expected to influence oxides particle properties and fuel pellet sintering. (C) 2017 Elsevier B.V. All rights reserved.
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