Journal
CERAMICS INTERNATIONAL
Volume 47, Issue 5, Pages 6329-6335Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.ceramint.2020.10.211
Keywords
SPS; Gd2Zr2O7 ceramic; Simulated An(3+); Solubility
Categories
Funding
- National Natural Science Foundation of China [21507105, 51702298]
- Science Development Foundation of China Academy of Engineering Physics
- State Key Laboratory of Environment-friendly Energy Materials, Southwest University of Science and Technology [18fksy0213]
- Open Foundation of Hubei Key Laboratory of Plasma Chemistry and Advanced Materials [2020K05]
- Research Fund Program of Guangdong Key Laboratory of Radioactive and Rare Resource Utilization [2019-LRRRU02]
- Dean Foundation of China Academy of Engineering Physics [YZJJLX2017009]
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The effects of Nd2O3 doping amount on the sintering characteristics of Gd2Zr2O7 ceramic immobilized simulated An(3+) were investigated, showing that an increase in Nd2O3 doping amount leads to a decrease in density and Vickers hardness values of the sintered ceramics.
To simplify the immobilized process of nuclear waste, synthetic Gd2Zr2O7 ceramic was employed to immobilize simulated An(3+) (Nd3+) by spark plasma sintering (SPS) without any ion occupation or valence design. Sintering and characterization of immobilized simulated An(3+) with various doping amounts were carried out. The effects of Nd2O3 content on the phase composition, active modes, micro-graph and density of the sintered ceramics were investigated. When the Nd2O3 doped amount reached up to 50 mol%, the raw peak of Nd2O3 existed. The sintered ceramics kept a single fluorite phase when Nd2O3 solubility achieved to 40 mol%. The sintered ceramics presented a well crystalline phase and the elements distributed evenly. In addition, as the Nd2O3 doped amount increase, the density and Vickers hardness values of Nd2O3 doped sample decrease.
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