| Title: |
Synthesis and characterization of homogeneous (U,Am)O₂ and (U,Pu,Am)O₂ nanopowders |
| Authors: |
Vigier, Jean-François; Freis, Daniel; Walter, Olaf; Dieste Blanco, Oliver; Bouëxière, Daniel; Zuleger, Evelyn; Palina, Natalia; Vitova, Tonya; Konings, Rudy J. M.; Popa, Karin |
| Source: |
CrystEngComm, 24 (36), 6338-6348 ; ISSN: 1466-8033 |
| Publisher Information: |
Royal Society of Chemistry |
| Publication Year: |
2022 |
| Collection: |
KITopen (Karlsruhe Institute of Technologie) |
| Subject Terms: |
ddc:600; Technology; info:eu-repo/classification/ddc/600 |
| Description: |
This paper details the first dedicated production of homogeneous nanocrystalline particles of mixed actinide oxide solid solutions containing americium. The target compositions were $U_{0.75}Pu_{0.20}Am_{0.05}O_{2}$, $U_{0.90}Am_{0.10}O_{2}$ and $U_{0.80}Am_{0.20}O_{2}$. After successful hydrothermal synthesis and chemical characterisation, the nanocrystals were sintered and their structure and behaviour under self-irradiation were studied by powder XRD. Cationic charge distribution of the as-prepared nanocrystalline and sintered $U_{0.80}Am_{0.20}O_{2}$ materials was investigated applying $U M_{4}$ and $Am M_{5}$ edge high energy resolution XANES (HR-XANES). Typical oxidation states detected for the cations are $U_{(IV)}/U_{(V)}$ and $Am_{(III)}/Am_{(IV)}$. The measured crystallographic swelling was systematically smaller for the as-synthesised nanoparticles than the sintered products. For sintered pellets, the maximal volumetric swelling was about 0.8% at saturation, in line with literature data for $PuO_{2}$, $AmO_{2}$, $(U,Pu)O_{2}$ or $(U,Am)O_{2}$. |
| Document Type: |
article in journal/newspaper |
| File Description: |
application/pdf |
| Language: |
English |
| ISBN: |
978-1-00-015059-9; 1-00-015059-3 |
| ISSN: |
1466-8033 |
| Relation: |
info:eu-repo/semantics/altIdentifier/wos/000847795600001; info:eu-repo/semantics/altIdentifier/issn/1466-8033; https://publikationen.bibliothek.kit.edu/1000150593; https://publikationen.bibliothek.kit.edu/1000150593/149283479; https://doi.org/10.5445/IR/1000150593 |
| DOI: |
10.5445/IR/1000150593 |
| Availability: |
https://publikationen.bibliothek.kit.edu/1000150593; https://publikationen.bibliothek.kit.edu/1000150593/149283479; https://doi.org/10.5445/IR/1000150593 |
| Rights: |
https://creativecommons.org/licenses/by/3.0/deed.de ; info:eu-repo/semantics/openAccess |
| Accession Number: |
edsbas.CBCD0CEC |
| Database: |
BASE |