Component effects on crystallization of RE-containing aluminoborosilicate glass

JOURNAL OF NUCLEAR MATERIALS

卷:478

Article

Fadzil, Syazwani Mohd^1,2  Hrma, Pavel^1,3  Schweiger, Michael J.³  Riley, Brian J.³ 

[1] Pohang Univ Sci & Technol, Div Adv Nucl Engn, Pohang 790784, South Korea

[2] Natl Univ Malaysia, Fac Sci & Technol, Sch Appl Phys, Bandar Baru Bangi 43650, Selangor, Malaysia

[3] Pacific Northwest Natl Lab, POB 999, Richland, WA USA

关键词: Lanthanide borosilicate glass;    Pyroprocessing;    Liquidus temperature;    Crystalline phases;   

DOI  :  10.1016/j.jnucmat.2016.06.018

来源: Elsevier

【 摘 要 】

Lanthanide-aluminoborosilicate (LABS) glass is one option for immobilizing rare earth (RE) oxide fission products generated during reprocessing of pyroprocessed fuel. This glass system can accommodate a high loading of RE oxides and has excellent chemical durability. The present study describes efforts to model equilibrium crystallinity as a function of glass composition and temperature as well as liquidus temperature (T-L) as a function of glass composition. The experimental method for determining T-L was ASTM C1720-11. Typically, three crystalline phases were formed in each glass: Ce-borosilicate (Ce3B-Si2O10), mullite (Al10Si2O19), and corundum (Al2O3). Cerianite (CeO2) was a common minor crystalline phase and Nd-silicate (Nd2Si2O7) occurred in some of the glasses. In the composition region studied, T-L decreased as SiO2 and B2O3 fractions increased and strongly increased with increasing fractions of RE oxides; Al2O3 had a moderate effect on the T-L but, as expected, it strongly affected the precipitation of Al-containing crystals. (C) 2016 Elsevier B.V. All rights reserved.

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