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Updated: Jan 10, 2026

06:53
Fabrication and Optimization of Type II Silicon Clathrate Films
Published on: October 14, 2025
971
酸玻璃中Cl和F结合的结构:硫酸盐的保留,盐的形成和其他特性
John M Bussey1,2,3, Natalie J Smith-Gray1,4, Nicholas Stone-Weiss1,5
1School of Mechanical and Materials Engineering, Washington State University, Pullman, Washington 99164, United States.
The journal of physical chemistry. B
|November 24, 2025
概括
化物加入到酸盐玻璃中形成盐,改变其性能. 化物添加导致结晶和相分离,影响玻璃特性和硫酸盐行为.
科学领域:
- 材料科学 材料科学 材料科学
- 地质化学 地质化学
- 核工程 核工程是指核工程.
背景情况:
- 诸如化物 (Cl-),化物 (F-),硫酸盐 (SO42-) 等挥发性离子在地质,工业和核废物玻璃化过程中显著影响酸盐化行为.
- 在核废物玻璃化过程中,这些挥发性物质会导致盐的形成,限制废物加载,并对化操作和废物形式的耐用性产生负面影响.
研究的目的:
- 研究化物 (Cl) 和化物 (F) 添加对汉福德模型结构,相稳定性和性能的影响.
- 了解核废料玻璃中挥发性离子诱导的盐形成和相分离的机制.
主要方法:
- 合成具有不同Cl或F含量和固定的SO42-.的模型性酸玻璃.
- 使用多技术方法进行表征:使用能量分散式X射线光谱的电子显微镜,拉曼光谱,核磁共振 (NMR) 光谱和X射线纳米计算机断层扫描.
主要成果:
- 合物和度约为3mol%,导致NaCl丰富的盐形成,过多的Cl和SO42-,这降低了玻璃中的Na2O和SO42-含量,同时增加了玻璃过渡温度 (Tg),分子体积,4-协调 (N4) 和网络聚合.
- 在液-液相分离之前,化物被保留了大约12mol%,导致CaF2结晶,随后化物 (NaF) 和化石 (Na3AlF6) 沉,并添加了更多的F.
- 在相位分离之前,添加F降低了Tg并增加了N4;F对SO42-保持的影响最小,直到结晶,之后SO42-优先分离为富含F的滴.
结论:
- 化物和化物表现出不同的结合行为,并诱导不同的相位进化途径在玻璃,显著影响玻璃性能和硫酸盐分区.
- 了解这些由挥发物引起的现象对于优化核废物玻璃化工艺,确保废物形式的耐用性和保持炼器运营效率至关重要.
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