构成复杂度对快速重离子辐射泰坦酸铁氧化的形态化阻力的影响
George Adamson1, John Michael Hirtz1, Cale Overstreet1
1Department of Nuclear Engineering, University of Tennessee, Knoxville, Tennessee 37996, United States.
Inorganic chemistry
|December 18, 2025
概括
这项研究研究了氧化硫氧化物的辐射反应,发现复杂氧化物的无形轨迹直径与阴离子大小相关. 这项研究对于开发适用于恶劣环境的材料至关重要,例如核废物形式.
科学领域:
- 材料科学 材料科学 材料科学
- 核工程 核工程是指核工程.
- 固态化学 固态化学
背景情况:
- 构成复杂的氧化物对高温和辐射应用具有前景.
- 了解它们在极端条件下的结构演变对于技术部署至关重要.
研究的目的:
- 为了评估两个氧化氧化物 (Yb0.2Er0.2Dy0.2Tb0.2Gd0.2) 2Ti2O7和Ho2Ti2O7对高能离子辐射的结构反应.
- 为了比较它们的辐射耐受性,并了解影响无形轨道形成的因素.
主要方法:
- 同步光X射线衍射同步光X射线衍射.
- 传输电子显微镜 (TEM) 的使用
- 拉曼光谱法 拉曼光谱法
- 密度函数理论 (DFT) 的计算.
主要成果:
- 两种酸盐氧化物都表现出相似的辐射反应,主要是失去结晶性.
- 在 (Yb0.2Er0.2Dy0.2Tb0.2Gd0.2) 2Ti2O7 中的无形轨迹直径略大于Ho2Ti2O7,与更大的A位点离子大小保持一致.
- 一个无序的,晶体外,带有韦伯类型的结构,周围环绕着 (Yb0.2Er0.2Dy0.2Tb0.2Gd0.2) 2Ti2O7.2中的无形轨迹.
结论:
- 在这些火中,辐射诱导的无形化受着阳离子大小和局部晶格扭曲的影响.
- 这些发现提供了对设计耐辐射复杂氧化物的见解,以适用于苛刻的应用.
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