期刊
CERAMICS INTERNATIONAL
卷 46, 期 7, 页码 9968-9971出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.ceramint.2019.12.219
关键词
Sol-gel processes; Ba1-x(La, Cs)(x)ZrO3; Perovskites; Nuclear applications
资金
- open Project State Key Laboratory of Environment-friendly Energy Materials, China [18kfhg04]
- National Natural Science Foundation of China [51502249]
Radioactive and toxic cesium (Cs) is difficult to be immobilized due to the volatilizing at high temperatures. Ba1-x(La, Cs)(x)ZrO3 (x = 0, 0.1, 0.2, 0.3, 0.4) ceramics were synthesized by sol-gel method at a low temperature for Cs immobilization. The structural and morphological characterizations show that the Ba1-x(La, Cs)(x)ZrO3 ceramics composed of closely arranged particles have a single perovskite structure, and Cs has been successfully incorporated into the lattice. Leaching test shows that Cs has an excellent leaching rate (0.894 x 10(-3) g m(-2) d(-1)) in Ba1-x(La, Cs)(x)ZrO3 ceramics, lower than the hollandite-rich synroc and pollucite. It reveals that the perovskite-type Ba1-x(La, Cs)(x)ZrO3 ceramics have high chemical stability and can be a potential alternative material to immobilize Cs.
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