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Synthesis and characterization of nanocrystalline U$_{1-x}$Pu$_{x}$O$_{2(+y)}$ mixed oxides

Kauric, G.; Walter, O.; Beck, A.; Schacherl, B.; Dieste Blanco, O.; Vigier, J.-F.; Zuleger, E.; Vitova, T.; Popa, K.

We report here the first synthesis of mixed oxide U$_{1-x}$Pu$_{x}$O$_{2(+y)}$ nanoparticles. The obtained nanopowders were characterized by X-ray diffraction, thermal ionization mass spectrometry, transmission electron microscopy, Raman spectroscopy, and U M$_{4}$ edge high-energy-resolution X-ray absorption near edge structure (HR-XANES). The HR-XANES spectra give evidence for the partial oxidation of U$^{IV}$ to U$^{V}$. This novel route toward the formation of actinide–actinide solid solution opens research opportunities that are not accessible using bulk materials. We give details on the X-ray diffraction study on plutonium oxalate hexahydrate, as a reagent for the synthesis of such nanoparticles.

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Verlagsausgabe §
DOI: 10.5445/IR/1000125234
Veröffentlicht am 23.10.2020
DOI: 10.1016/j.mtadv.2020.100105
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Nukleare Entsorgung (INE)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2020
Sprache Englisch
Identifikator ISSN: 2590-0498
KITopen-ID: 1000125234
Erschienen in Materials today advances
Band 8
Seiten Art.-Nr.: 100105
Schlagwörter Hydrothermal decomposition; Oxide nuclear fuel; Oxalate; Plutonium; Uranium; HR-XANES
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