Synthesis of nanostructured ThO 2 pellets

Emanuele de Bona (1) , Olaf Walter (2) , Heike Störmer (3) , Thierry Wiss (1) , Gianguido Baldinozzi (4) , Marco Cologna (1) , Karin Popa (1)

1 JRC - European Commission - Joint Research Centre [Karlsruhe]
2 ITU - JRC Institute for Transuranium Elements [Karlsruhe]
3 KIT - Karlsruher Institut für Technologie
4 SPMS - Laboratoire Structures, Propriétés et Modélisation des solides

We present here for the first time the production of 3- to 5-nm–sized thoria nanopowders by decomposition of Th-hydroxide under hot compressed water and their consolidation by high-pressure spark plasma sintering into dense nanostructured ThO2 with grain size of 50 nm.

Mots clés: decomposition of hydroxides under hot compressed water; high burn‐up structure (HBS); nanostructured ceramics; spark plasma sintering; thorium oxide

Domaines: Matériaux; Chimie inorganique; Radiochimie

Emanuele de Bona, Olaf Walter, Heike Störmer, Thierry Wiss, Gianguido Baldinozzi, et al.. Synthesis of nanostructured ThO 2 pellets. Journal of the American Ceramic Society, 2019, 102 (7), pp.3814-3818. ⟨10.1111/jace.16375⟩. ⟨hal-02415373⟩