硼硅酸盐玻璃
耐久性
溶解
材料科学
苏打石灰玻璃
氧化物
钝化
化学工程
冶金
复合材料
矿物学
化学
图层(电子)
工程类
作者
Kamalesh Damodaran,Stéṕhane Gin,Sathya Naranayasamy,Jean‐Marc Delaye
标识
DOI:10.1038/s41529-023-00364-3
摘要
Abstract The chemical durability of borosilicate glass used to confine nuclear wastes is known to vary nonlinearly with their composition, making glass dissolution rate predictions difficult. Here, we focus on the effect of Al, an important oxide of these materials. The initial and residual glass dissolution rates were investigated through experiments conducted at 90 °C and pH 9. Our results show that low Al content glasses dissolve initially faster than glasses with higher Al content, but quickly achieve a lower residual rate due to the rapid formation of a more passivating gel. Nevertheless, the high Al content gel will eventually achieve passivation with a slower reorganization. The strengthening effect of Al on the Si-O bond hydrolysis will result in more stable gels, suggesting that slightly higher Al content in the gel will improve nuclear high-level waste glass durability in geological disposal conditions.
科研通智能强力驱动
Strongly Powered by AbleSci AI