兰州大学机构库
Irradiation-induced redox behavior in Ce-doped Lu2Ti2O7 pyrochlores
Liao, Qian1; Xia, Yue1,2,3; Tan, Xi1; Wu, Guanfeng1; Jin, Xianjin1; Xu, Min1,3; Li, Chunguang3,4,5; Liu, Longcheng1,3; Li, Yuhong2
2023-11-15
Online publication date2023-10
Source PublicationCERAMICS INTERNATIONAL   Impact Factor & Quartile
ISSN0272-8842 ; 1873-3956
EISSN1873-3956
Volume49Issue:22Pages:35193-35201
page numbers9
AbstractLong-term self-irradiation of high-level waste (HLW) matrices may cause diverse microstructural changes, which can degrade their immobilization performance. This study reports the irradiation-induced redox response of Cedoped pyrochlores, which can be attributed to the damage process in pyrochlores. Lu2Ti2O7 and Lu1.46Ce0.54Ti2O7+x pyrochlores were irradiated by 400 keV Ne2+. The coordinate environment of the elements was characterized by X-ray photoelectron spectroscopy, X-ray diffraction (XRD), and Raman spectroscopy, while the chemical compositions of the samples were analyzed by scanning electron microscopy. First, the irradiationinduced oxidation of Ce was observed in Lu1.46Ce0.54Ti2O7+x at doses of 0-0.052 dpa, and the Ce3+ content was found to decrease from 61.73% to 58.44%. When the dose was increased to 0.261 dpa, the valency of Ce was reduced, and the Ce3+ content increased to 59.25%. Herein, the reduction behavior is discussed in terms of amorphization and recrystallization in the irradiated Lu1.46Ce0.54Ti2O7+x. This irradiation-induced redox behavior of Ce-doped pyrochlores provides another perspective for predicting the long-term performance of HLW matrices in repositories.
KeywordPyrochlores Ion irradiation Redox behavior
PublisherELSEVIER SCI LTD
DOI10.1016/j.ceramint.2023.08.192
Indexed BySCIE
Language英语
WOS Research AreaMaterials Science
WOS SubjectMaterials Science, Ceramics
WOS IDWOS:001094911300001
Original Document TypeArticle
Citation statistics
Document Type期刊论文
Identifierhttps://ir.lzu.edu.cn/handle/262010/568990
Collection兰州大学
Corresponding AuthorXia, Yue; Li, Chunguang
Affiliation
1.Univ South China, Sch Nucl Sci & Technol, Hengyang 421001, Peoples R China;
2.Lanzhou Univ, Sch Nucl Sci & Technol, Lanzhou 730000, Peoples R China;
3.Univ South China, R&D Ctr Radioact Waste Treatment Disposal & Modeli, Hengyang 421001, Peoples R China;
4.Univ South China, Sch Resource Environm & Safety Engn, Hengyang 421001, Peoples R China;
5.China Inst Atom Energy, Beijing 102413, Peoples R China
Recommended Citation
GB/T 7714
Liao, Qian,Xia, Yue,Tan, Xi,et al. Irradiation-induced redox behavior in Ce-doped Lu2Ti2O7 pyrochlores[J]. CERAMICS INTERNATIONAL,2023,49(22):35193-35201.
APA Liao, Qian.,Xia, Yue.,Tan, Xi.,Wu, Guanfeng.,Jin, Xianjin.,...&Li, Yuhong.(2023).Irradiation-induced redox behavior in Ce-doped Lu2Ti2O7 pyrochlores.CERAMICS INTERNATIONAL,49(22),35193-35201.
MLA Liao, Qian,et al."Irradiation-induced redox behavior in Ce-doped Lu2Ti2O7 pyrochlores".CERAMICS INTERNATIONAL 49.22(2023):35193-35201.
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