Immobilization of simulated An3+ into synthetic Gd2Zr2O7 ceramic by SPS without occupation or valence design

To simplify the immobilized process of nuclear waste, synthetic Gd2Zr2O7 ceramic was employed to immobilize simulated An3+ (Nd3+) by spark plasma sintering (SPS) without any ion occupation or valence design. Sintering and characterization of immobilized simulated An3+ with various doping amounts wer...

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Published inCeramics international Vol. 47; no. 5; pp. 6329 - 6335
Main Authors Luo, Fen, Tang, Hexi, Shu, Xiaoyan, Chen, Zhi, Xu, Chen, Wei, Guilin, Wu, Dong, Chen, Shunzhang, Zhang, Haibin, Xie, Yi, Huang, Wenxiao, Wang, Lan, Lu, Xirui
Format Journal Article
LanguageEnglish
Published Elsevier Ltd 01.03.2021
Subjects
Gd2Zr2O7 ceramic
Simulated An3
Solubility
SPS
Simulated An3
SPS
Solubility
Gd2Zr2O7 ceramic
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Summary:To simplify the immobilized process of nuclear waste, synthetic Gd2Zr2O7 ceramic was employed to immobilize simulated An3+ (Nd3+) by spark plasma sintering (SPS) without any ion occupation or valence design. Sintering and characterization of immobilized simulated An3+ 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.
ISSN:0272-8842
1873-3956
DOI:10.1016/j.ceramint.2020.10.211