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Jo B, Shim Y. Scrap oxidation of uranium carbide heavy ion accelerator target material. KOREAN J CHEM ENG 2022. [DOI: 10.1007/s11814-022-1108-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Corradetti S, Carturan SM, Ballan M, Eloirdi R, Amador Celdran P, Walter O, Staicu D, Dieste Blanco O, Andrighetto A, Biasetto L. Effect of graphite and graphene oxide on thorium carbide microstructural and thermal properties. Sci Rep 2021; 11:9058. [PMID: 33907205 PMCID: PMC8079694 DOI: 10.1038/s41598-021-87621-0] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2020] [Accepted: 03/31/2021] [Indexed: 11/24/2022] Open
Abstract
Thorium carbide to be tested as target material for the production of 225Ac with the ISOL method, was produced via carbothermal reduction of ThO2 nanoparticles by graphite and graphene oxide, respectively. The use of graphene oxide (GO) as carbon source resulted in a reduced reactivity compared to graphite, confirmed by the presence of unreacted ThO2 mainly in the core of the samples. The reacted ThO2 or ThC2-GO showed a faster reactivity in air, mainly observed as ThC2 amorphization. The specific surface area of the ThC2-GO samples was almost doubled compared to ThC2-graphite samples. The effect of these microstructural features was analysed in terms of thermal diffusivity and calculated thermal conductivity that were both reduced in ThC2-GO samples, however the difference with ThC2-graphite samples decreased at increasing temperature. The present study shows that the use of unreduced GO inhibits the solid-state reaction between ThO2 and C; on the other hand, the high reactivity of the ThC2 so produced is expected to be beneficial for the 225Ac production with the ISOL method, affording a high release efficiency. It is expected that the use of reduced GO could represent a good solution for highly efficient ThC2 targets.
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Affiliation(s)
- S Corradetti
- INFN-Laboratori Nazionali di Legnaro, Viale dell'Università 2, 35020, Legnaro, PD, Italy
| | - S M Carturan
- INFN-Laboratori Nazionali di Legnaro, Viale dell'Università 2, 35020, Legnaro, PD, Italy
- Dipartimento di Fisica e Astronomia, Università di Padova, Via Marzolo 8, 5131, Padua, Italy
| | - M Ballan
- INFN-Laboratori Nazionali di Legnaro, Viale dell'Università 2, 35020, Legnaro, PD, Italy
| | - R Eloirdi
- Joint Research Centre, Directorate G for Nuclear Safety and Security, European Commission, Postfach 2340, 76215, Karlsruhe, Germany.
| | - P Amador Celdran
- Joint Research Centre, Directorate G for Nuclear Safety and Security, European Commission, Postfach 2340, 76215, Karlsruhe, Germany
| | - O Walter
- Joint Research Centre, Directorate G for Nuclear Safety and Security, European Commission, Postfach 2340, 76215, Karlsruhe, Germany
| | - D Staicu
- Joint Research Centre, Directorate G for Nuclear Safety and Security, European Commission, Postfach 2340, 76215, Karlsruhe, Germany
| | - O Dieste Blanco
- Joint Research Centre, Directorate G for Nuclear Safety and Security, European Commission, Postfach 2340, 76215, Karlsruhe, Germany
| | - A Andrighetto
- INFN-Laboratori Nazionali di Legnaro, Viale dell'Università 2, 35020, Legnaro, PD, Italy
| | - L Biasetto
- INFN-Laboratori Nazionali di Legnaro, Viale dell'Università 2, 35020, Legnaro, PD, Italy
- Dipartimento di Tecnica e Gestione dei Sistemi Industriali, Università Di Padova, Stradella San Nicola 3, 36100, Vicenza, Italy
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