کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7963230 | 1514142 | 2018 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Self-propagating plus quick pressing synthesis and characterizations of Gd2-xNdxTi1.3Zr0.7O7 (0â¯â¤â¯xâ¯â¤â¯1.4) pyrochlores
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی انرژی
انرژی هسته ای و مهندسی
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چکیده انگلیسی
Synroc is recognized as an ideal matrice for the immobilization of high-level radioactive waste (HLW). In this study, the Synroc mineral of pyrochlore was employed as host phase for the immobilization of Nd2O3, which was selected as surrogate of trivalent actinide nuclides. Gd2-xNdxTi1.3Zr0.7O7/Cu composites were rapidly synthesized by self-propagating high-temperature synthesis plus quick pressing (SHS/QP) using CuO as the oxidant and Ti as the reductant. The result shows that the Nd2O3 doped reactions could be ignited as xâ¯â¤â¯1.4 and Gd2-xNdxTi1.3Zr0.7O7 pyrochlores were successfully prepared with Cu as the secondary phase. The synthesized pyrochlore-based waste form exhibits density of 4.93â¯g/cm3 and Vickers hardness of 14.90â¯GPa, as well as promising aqueous durability. The LRGd and LRNd value of the xâ¯=â¯1.4 sample are as low as 3.28â¯Ãâ¯10â5 and 2.27â¯Ãâ¯10â5â¯gâ¯mâ2·dâ1 after 42 days leaching.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Nuclear Materials - Volume 504, June 2018, Pages 61-67
Journal: Journal of Nuclear Materials - Volume 504, June 2018, Pages 61-67
نویسندگان
Zongsheng He, Kuibao Zhang, Le Peng, Wenwen Zhao, Jiali Xue, Haibin Zhang,