Alteration of cold crucible melter titanate-based ceramics: comparison with hot-pressed titanate-based ceramic
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Date
1997
Journal Title
Journal ISSN
Volume Title
Publisher
Materials Research Society
Abstract
Synroc ceramics were synthesized in an induction-heated cold crucible at laboratory scale (1 kg) from an oxide mixture, and at industrial prototype scale (45 kg) from Synroc previously produced by sintering under load at high temperature. After melting, both materials contained the major phases of Synroc-C. The chemical durability of both melted materials, as determined by static leaching of powder samples in initially pure water at 90°C with an SA/V ratio of 20000m−1, was equivalent to that of conventional hot-pressed Synroc-C. Cerium, used in this investigation to simulate the presence of tri-and tetravalent actinides, was found in steady-state concentrations on the order of 1 ppb (i.e. NL(Ce) ≤ 10−6 g·m−2). The concentration in the leachates was independent of the initial CeO2 content of the Synroc (at least up to 10 wt%); moreover, it is similar to the results obtained with hot-pressed Synroc-C specifically formulated for conditioning long-lived actinides. © Materials Research Society 1997
Description
Physical copy held by ANSTO at DDC: 621.4838/31.
Abstract also available online at https://doi.org/10.1557/PROC-465-355
Keywords
Synroc process, Ceramics, Oxides, Induction, Leaching, Powders, Leachates, Actinides
Citation
Advocat, T., Leturcq, G., Lacombe, J., Berger, G., Day, R. A., Hart, K., Vernaz, E., & Bonnetier, A. (1996). Alteration of cold crucible melter titanate-based ceramics: comparison with hot-pressed titanate-based ceramic. Paper presented to the Scientific Basis for Nuclear Waste Management XX, 2-6 December 1996, Boston, Massachachuetts, U. S. A. In Gray, W. J. & Triay, I. R. (Eds.), Material Research Society Proceedings, Symposium held 2-6 December, 1996, Boston, Massachusetts, U. S. A., (Vol. 465, pp. 355-362).