Journal
JOURNAL OF NON-CRYSTALLINE SOLIDS
Volume 545, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.jnoncrysol.2020.120246
Keywords
Phosphate glass-ceramics; Phase analysis; Structures; Aqueous durability
Funding
- National Natural Science Foundation of China [51702268]
- China Industrial Technology Development Program [2017-1407]
- Project of State Key Laboratory of Environment-friendly Energy Materials, Southwest University of Science and Technology [18fksy0212]
- Department of Science and Technology in Guizhou Province [LH[2017]7071]
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In this paper, monazite-iron phosphate based glass-ceramics for immobilization of a simulated high-level nuclear waste (HLW) derived from the composition of a nuclear waste in China were prepared through a melt-quenching process. The effect of HLW incorporation on phases, structural features, aqueous durability and properties of the as-prepared wasteforms were investigated in detail. The results show that the waste loading can be significantly elevated by forming monazite (Ce, La, Nd)PO4 containing glass-ceramic wasteforms through the melt-quenching process. The obtained glass/glass-ceramic wasteforms show good aqueous durability (similar to 10(-4) g m(-2) d(-1)) and thermal stability. Moreover, the formation of monazite (Ce, La, Nd)PO4 phase in the wasteforms is discussed. The conclusions suggest that it is feasible to synthesize (Ce, La, Nd)PO4-phosphate glass-ceramic wasteforms through melt-quenching process and monazite-iron phosphate based glass-ceramics are potential candidates for immobilization of the HLW.
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