Effect of graphite and graphene oxide on thorium carbide microstructural and thermal properties

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 comp...

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Autores principales:	S. Corradetti, S. M. Carturan, M. Ballan, R. Eloirdi, P. Amador Celdran, O. Walter, D. Staicu, O. Dieste Blanco, A. Andrighetto, L. Biasetto
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/6b26d581247f458dbe3762db3670b398
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spelling	oai:doaj.org-article:6b26d581247f458dbe3762db3670b3982021-12-02T14:53:43ZEffect of graphite and graphene oxide on thorium carbide microstructural and thermal properties10.1038/s41598-021-87621-02045-2322https://doaj.org/article/6b26d581247f458dbe3762db3670b3982021-04-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-87621-0https://doaj.org/toc/2045-2322Abstract 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.S. CorradettiS. M. CarturanM. BallanR. EloirdiP. Amador CeldranO. WalterD. StaicuO. Dieste BlancoA. AndrighettoL. BiasettoNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-11 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q S. Corradetti S. M. Carturan M. Ballan R. Eloirdi P. Amador Celdran O. Walter D. Staicu O. Dieste Blanco A. Andrighetto L. Biasetto Effect of graphite and graphene oxide on thorium carbide microstructural and thermal properties
description	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.
format	article
author	S. Corradetti S. M. Carturan M. Ballan R. Eloirdi P. Amador Celdran O. Walter D. Staicu O. Dieste Blanco A. Andrighetto L. Biasetto
author_facet	S. Corradetti S. M. Carturan M. Ballan R. Eloirdi P. Amador Celdran O. Walter D. Staicu O. Dieste Blanco A. Andrighetto L. Biasetto
author_sort	S. Corradetti
title	Effect of graphite and graphene oxide on thorium carbide microstructural and thermal properties
title_short	Effect of graphite and graphene oxide on thorium carbide microstructural and thermal properties
title_full	Effect of graphite and graphene oxide on thorium carbide microstructural and thermal properties
title_fullStr	Effect of graphite and graphene oxide on thorium carbide microstructural and thermal properties
title_full_unstemmed	Effect of graphite and graphene oxide on thorium carbide microstructural and thermal properties
title_sort	effect of graphite and graphene oxide on thorium carbide microstructural and thermal properties
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/6b26d581247f458dbe3762db3670b398
work_keys_str_mv	AT scorradetti effectofgraphiteandgrapheneoxideonthoriumcarbidemicrostructuralandthermalproperties AT smcarturan effectofgraphiteandgrapheneoxideonthoriumcarbidemicrostructuralandthermalproperties AT mballan effectofgraphiteandgrapheneoxideonthoriumcarbidemicrostructuralandthermalproperties AT reloirdi effectofgraphiteandgrapheneoxideonthoriumcarbidemicrostructuralandthermalproperties AT pamadorceldran effectofgraphiteandgrapheneoxideonthoriumcarbidemicrostructuralandthermalproperties AT owalter effectofgraphiteandgrapheneoxideonthoriumcarbidemicrostructuralandthermalproperties AT dstaicu effectofgraphiteandgrapheneoxideonthoriumcarbidemicrostructuralandthermalproperties AT odiesteblanco effectofgraphiteandgrapheneoxideonthoriumcarbidemicrostructuralandthermalproperties AT aandrighetto effectofgraphiteandgrapheneoxideonthoriumcarbidemicrostructuralandthermalproperties AT lbiasetto effectofgraphiteandgrapheneoxideonthoriumcarbidemicrostructuralandthermalproperties
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Effect of graphite and graphene oxide on thorium carbide microstructural and thermal properties

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