DOAJ Open Access 2023

Zirconolite Matrices for the Immobilization of REE–Actinide Wastes

Sergey V. Yudintsev Maximilian S. Nickolsky Michael I. Ojovan Olga I. Stefanovsky Victor I. Malkovsky +2 lainnya

Abstrak

The structural and chemical properties of zirconolite (ideally CaZrTi<sub>2</sub>O<sub>7</sub>) as a host phase for separated REE–actinide-rich wastes are considered. Detailed analysis of both natural and synthetic zirconolite-structured phases confirms that a selection of zirconolite polytype structures may be obtained, determined by the provenance, crystal chemistry, and/or synthesis route. The production of zirconolite ceramic and glass–ceramic composites at an industrial scale appears most feasible by cold pressing and sintering (CPS), pressure-assisted sintering techniques such as hot isostatic pressing (HIP), or a melt crystallization route. Moreover, we discuss the synthesis of zirconolite glass ceramics by the crystallization of B–Si–Ca–Zr–Ti glasses containing actinides in conditions of increased temperatures relevant to deep borehole disposal (DBD).

Topik & Kata Kunci

Technology Chemical technology

Penulis (7)

Sergey V. Yudintsev

Maximilian S. Nickolsky

Michael I. Ojovan

Olga I. Stefanovsky

Victor I. Malkovsky

Amina S. Ulanova

Lewis R. Blackburn

Format Sitasi

APA MLA BibTeX

Yudintsev, S.V., Nickolsky, M.S., Ojovan, M.I., Stefanovsky, O.I., Malkovsky, V.I., Ulanova, A.S. et al. (2023). Zirconolite Matrices for the Immobilization of REE–Actinide Wastes. https://doi.org/10.3390/ceramics6030098

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Informasi Jurnal

Tahun Terbit: 2023
Sumber Database: DOAJ
DOI: 10.3390/ceramics6030098
Akses: Open Access ✓