通过对Y化CeO2固体溶液中的重离子辐射来操纵缺陷化学
R Mohun1, T Cordara2, J McCloy3
1Nuclear Futures Institute, School of Computer and Science Engineering, Bangor University, Bangor, LL57 1UT, UK. r.mohun@bangor.ac.uk.
Physical chemistry chemical physics : PCCP
|January 21, 2026
概括
添加的 (CeO2) 显示了由于缺陷排序和改善格子恢复的增强辐射稳定性. 兴奋剂提高了对辐射损伤的抵抗力,表面效应影响了缺陷化.
科学领域:
- 材料科学 材料科学 材料科学
- 固态化学 固态化学
- 辐射的影响 辐射效应
背景情况:
- (CeO2) 是一种多功能材料,可用于催化,固体氧化物燃料电池和辐射屏蔽.
- 了解兴奋剂和辐射对Ceria缺陷结构的影响对于优化其性能和耐用性至关重要.
研究的目的:
- 研究三价伊 (Y) 兴奋剂对的结构和辐射稳定性的影响.
- 分析氧气空缺的性质及其在充电补偿和缺陷形成中的作用.
- 为了评估在重离子辐射下Y化的耐辐射性.
主要方法:
- 用X射线衍射 (XRD) 进行结构分析和缺陷排序.
- 拉曼光谱和正子灭绝光谱用于表征氧气空缺.
- 重离子辐射实验在不同的流量 (1x10^16和5x10^16离子/cm^2) 进行.
主要成果:
- 的结合会诱导离子空位的长距离排序,并在化物结构中形成Y2O3纳米域.
- 光谱分析证实了异价替代和Ce3+形成,这与氧气空缺的产生有关.
- 与未使用剂的样本相比,用Y剂制的菌素对辐射损伤具有更强的抵抗力.
- 缺陷迁移和回火机制是流动依赖的,样品表面作为有效的回火点.
结论:
- 兴奋剂通过促进缺陷排序和增强格子恢复,显著提高了的辐射稳定性.
- 观察到的抗辐射性归因于剂诱导缺陷和辐射诱导缺陷的协同效应.
- 表面效应在辐射下缺陷火过程中起着至关重要的作用.
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