Morphology dependent sintering path of nanocrystalline ThO2

Tadeáš Wangle, Marek Belis, Václav Tyrpekl, Janne Pakarinen, Thomas Cardinaels, Thierry Delloye, Jozef Vleugels, Marc Verwerft

    Research outputpeer-review


    Thorium is most commonly precipitated as oxalate, because of the high efficiency regardless of precipitation conditions. Thorium oxalate readily decomposes into fine-grained ThO2 during heating, but keeps the macrostructure of the oxalate platelets. To assess the effects of precipitate macrostructure on the sintering behavior, different platelet morphologies were prepared and sintered. There are two factors which influence the sintering: the presence of holes within the platelets and the size of the platelets. Small platelets or precipitates with holes generally sinter to thorium dioxide pellets of a higher density and smaller grain size.
    Original languageEnglish
    Article number152081
    Pages (from-to)1-10
    Number of pages10
    JournalJournal of Nuclear Materials
    StatePublished - 1 Mar 2020

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