Phase and microstructure evolution of 0.2Zr1-xCexO2/Zr1-yCeySiO4 (0 ≤ x + y ≤ 1) ceramics designed to immobilize tetravalent actinides

Zircon is important ceramic used widely due to its excellent properties, in particular for nuclear waste immobilization. However, it is difficult to obtain mono-phase zircon with high yield, usually result in double-phase ZrO2/ZrSiO4 ceramics. Herein, Ce-doped double-phase 0.2Zr1-xCexO2/Zr1-yCeySiO4...

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Veröffentlicht in:	Journal of nuclear materials 2020-10, Vol.539, p.1, Article 152318
Hauptverfasser:	Ding, Yi, Jiang, Zhengdi, Xiong, Tianheng, Bai, Zimei, Zhao, Dandan, Dan, Hui, Duan, Tao
Format:	Artikel
Sprache:	eng
Schlagworte:	Actinides Ceramics Cerium Cubic lattice Double-phase Evolution Grain size Heat treating Immobilization Lattice parameters Microstructure Monoclinic lattice Nuclear waste immobilization Phase and microstructure evolution Phase composition Phase transitions Phases Radioactive wastes Zircon Zirconia Zirconium dioxide Zirconium silicate
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Zusammenfassung:	Zircon is important ceramic used widely due to its excellent properties, in particular for nuclear waste immobilization. However, it is difficult to obtain mono-phase zircon with high yield, usually result in double-phase ZrO2/ZrSiO4 ceramics. Herein, Ce-doped double-phase 0.2Zr1-xCexO2/Zr1-yCeySiO4 (0 ≤ x + y ≤ 1) ceramics were fabricated and their phase and microstructure evolution were studied. The results demonstrated that Ce content has great influence on the phase composition and microstructure. The ceramics with 0 ≤ x + y
ISSN:	0022-3115 1873-4820
DOI:	10.1016/j.jnucmat.2020.152318