Abstract
AbstractReactive spark plasma sintering has been utilised as a high-throughput processing route for the synthesis of two simulant zirconolite wasteform materials, targeting Ca0.80Ce0.20ZrTi1.60M0.40O7 (M = Fe3+ and Al3+). Materials were processed under 15 MPa uniaxial pressure, with heating/cooling rates of 100 °C/min to 1320 °C, maintained under vacuum. Despite moderate yield (> 80 wt%) of zirconolite-2M, a considerable Ce-rich perovskite phase was formed in both formulations, attributed to complete reduction of the Ce inventory to Ce3+, as determined by Ce L3-edge XANES analysis. The composition charge balanced with Al3+ was favoured on the basis of lower accompanying perovskite fraction.
Graphical abstract
Funder
Engineering and Physical Sciences Research Council
Publisher
Springer Science and Business Media LLC
Subject
Mechanical Engineering,Mechanics of Materials,Condensed Matter Physics,General Materials Science
Reference19 articles.
1. N.C. Hyatt, Safe management of the UK separated plutonium inventory: a challenge of materials degradation. NPJ Mater. Degrad. 4, 28 (2020)
2. L.R. Blackburn, N.C. Hyatt, Actinide immobilisation in dedicated wasteforms: an alternative pathway for the long-term management of existing actinide stockpiles, in Encyclopedia of Nuclear Energy, 1st edn., ed. by E. Greenspan (Elsevier, Amsterdam, 2021), pp. 650–662
3. L.R. Blackburn et al., Review of zirconolite crystal chemistry and aqueous durability. Adv. Appl. Ceram. 120(2), 1–15 (2021)
4. E.R. Vance et al., Incorporation of uranium in zirconolite (CaZrTi2O7). J. Am. Ceram. Soc. 85(7), 1853–1859 (2002)
5. B.D. Begg, R.A. Day, A. Brownscombe, Structural effect of Pu substitutions on the Zr-site in zirconolite. Mater. Res. Soc. Symp. Proc. 663, 1–8 (2001)
Cited by
8 articles.
订阅此论文施引文献
订阅此论文施引文献，注册后可以免费订阅5篇论文的施引文献，订阅后可以查看论文全部施引文献