Compositional dependence of crystallization and chemical durability in alkali aluminoborosilicate glasses

Compositional dependence of crystallization and chemical durability in alkali aluminoborosilicate glasses
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碱金属铝硼硅酸盐玻璃结晶和化学耐久性的成分依赖性

DOI:
10.1016/j.jnoncrysol.2022.121694
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发表时间:
2022
影响因子:
3.5
通讯作者:
Goel, Ashutosh
Goel, Ashutosh
中科院分区:
材料科学2区
文献类型:
--
作者:
Deshkar, Ambar;Parruzot, Benjamin;Youngman, Randall E.;Gulbiten, Ozgur;Vienna, John D.;Goel, Ashutosh

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本研究的目的是了解组成的结晶和化学耐久性的碱性铝硼硅酸盐为基础的模型核废料玻璃设计的过碱性,metaluminous和过铝制度的影响。玻璃已经使用罐中心线冷却(CCC)计划进行热处理。通过120天的产品一致性测试(PCT-B)评估了母体玻璃和CCC处理玻璃的化学耐久性。过铝玻璃表现出最高的溶解速率,其次是过碱性和金属发光玻璃。一般而言,增加玻璃中的B2 O3含量往往会抑制霞石的形成,从而减少霞石对最终废物形式耐久性的负面影响。然而,较高的B2 O3含量本身可能会对最终废物形式的耐久性产生不利影响。热历史已被证明对玻璃的耐久性具有显著影响。
This study aims to understand the impact of composition on crystallization and chemical durability in alkali aluminoborosilicate based model nuclear waste glasses designed in the peralkaline, metaluminous and peraluminous regimes. The glasses have been thermally treated using the canister centerline cooling (CCC) schedule. The chemical durability of both parent and CCC-treated glasses has been assessed by product consistency test (PCT-B) for 120 days. The peraluminous glasses exhibit the highest dissolution rates, followed by peralkaline and metaluminous glasses. In general, increasing B2O3content in glasses tends to suppress nepheline formation, thus, decreasing the negative impact of nepheline on durability of the final waste form. However, higher B2O3content itself may result in detrimental impact on the durability of the final waste form. The thermal history has been shown to have a significant impact on the durability of the glasses.
成分对硼硅酸盐玻璃长期溶解的影响
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