Abstract
The phase of pyrochlore Gd2Zr2O7 used for immobilization of Pu (IV) was investigated, tetravalent cerium was used as the simulacrum for plutonium with tetravalence, and the compounds in the system Gd2Zr2−x Ce x O7 (0.0 ⩽ x ⩽ 2.0) were synthesized via a high temperature solid reaction method with Gd2O3 and ZrO2 powders being used as the starting materials. Based on the collected XRD data of the gained samples, the phase and microstructural change of compounds were calculated by means of rietveld structural refinement method. The experimental results indicated that the phases of compounds were changed from pyrochlore to fluorite-type phase with the increasing x. The linear relation between a and x was discovered in the range of fluorite-type phase, which accorded with a = 0.52748 + 0.00825 x (0.2 ⩽ x ⩽ 2.0), while V = 0.14668 + 0.00711 x (0.2 ⩽ x ⩽ 2.0) was also achieved.
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References
Hatch LP. Ultimate Disposal of Radioactive Wastes[J]. Amer. Sci., 1953, 41: 410–421
Ringwood AE, Kesson SE, Ware NG, et al. Immobilisation of High Level Nuclear Reactor Wastes in SYNROC[J]. Nature, 1979, 278: 219–223
Clarke DR. Ceramic Materials for the Immobilization of Nuclear Waste[J]. Ann. Rev. Mater. Sci., 1983, 13: 191–218
Robert LEJ. Radioactive Waste Management[J]. Annu. Rev. Part. Sci., 1990, 40: 79–112
Donald IW, Metcalfe BL, Taylor RNJ. The Immobilization of High Level Wastes Using Ceramics and Glasses[J]. J. Mater. Sci., 1997, 32: 5 851–5 887
Weber WJ, Ewing RC, Angell C A, et al. Radiation Effects in Glasses Used for Immobilization of High-level Waste and Plutonium Disposition[J]. J. MATER. RES., 1997, 12: 1 946–1 978
Weber WJ, Ewing RC, Catlow CRA, et al. Radiation Efects in Crystalline Ceramics for the Immobilization of High-level Nuclear Waste and Plutonium Disposal[J]. J. Mater. Res., 1998, 13: 1 434–1 484
Wang SX, Begg BD, Wang LM, et al. Radiation Stability of Gadolinium Zirconate: A Waste Form for Plutonium Disposal[J]. J. Mater. Res., 1999, 14: 4 470–4 473
Weber WJ, Ewing RC. Plutonium Immobilization and Radiation Effects[J]. Science, 2000, 289: 2 051–2 052
Weber WJ, Ewing RC, Lian J. Nuclear Waste Disposal-Pyrochlore (A2B2O7): Nuclear Waste Form for the Immobilization of Plutonium and “Minor” Actinides[J]. J. Appl. Phys., 2004, 95: 5 949–5 971
Patwe SJ, Ambekar BR, Tyag AK. Synthesis, Characterization and Lattice Thermal Expansion of Some Compounds in the System Gd2CexZr2−x O7[J]. J. Alloys Comp., 2005, 389: 243–246
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Funded Partly by the Key Project of National High Technology Research and Development Program-“863”Program (No. 2009AA050703), the National Natural Science Foundation of China (Nos. 41302028, 41272050, and 21007052) and the Open Foundation of Joint Laboratory for Extreme Conditions Matter Properties, Southwest University of Science and Technology and Research Center of Laser Fusion, CAEP (No. 12zxjk04)
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Lu, X., Dong, F., Song, G. et al. Phase and rietveld refinement of pyrochlore Gd2Zr2O7 used for immobilization of Pu (IV). J. Wuhan Univ. Technol.-Mat. Sci. Edit. 29, 233–236 (2014). https://doi.org/10.1007/s11595-014-0899-2
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DOI: https://doi.org/10.1007/s11595-014-0899-2