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首页> 外文期刊>European Journal of Glass Science and Technology, PartA. Glass Technology >Comparison of the corrosion resistance of sintered and monolithic iron phosphate and niobium phosphate glasses containing U3O8
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Comparison of the corrosion resistance of sintered and monolithic iron phosphate and niobium phosphate glasses containing U3O8

机译：含U3O8的烧结和整体式磷酸铁与磷酸铌玻璃的耐腐蚀性比较

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摘要

Vitrification is currently the main process for the immobilisation of high level nuclear wastes. However, radioisotopes can be volatilised during the melting process; sintering is advantageous in this case. In the present work, a comparison is made between the properties of niobium phosphate and iron phosphate glasses. Sintered glasses were prepared and characterised. Mixtures of U3O8 and glass particles were pressed and sintered, or melted to produce simulant wasteforms. The thermal stability of the glasses was evaluated by differential thermal analysis. The dissolution rates in aqueous solutions with pH in the range of 2-12 were determined. As the pH increased, the dissolution rate also increased. The chemical durability of the niobium phosphate glasses was not significantly changed when uranium oxide was added. Based on the thermal stability, densification, and chemical durability, sintered niobium phosphate glasses are considered to be potential candidates for nuclear wasteforms.
机译：玻璃化目前是固定高含量核废料的主要过程。但是，放射性同位素可能会在熔化过程中挥发。在这种情况下，烧结是有利的。在本工作中，对磷酸铌玻璃和磷酸铁玻璃的性能进行了比较。制备并表征了烧结玻璃。 U3O8和玻璃颗粒的混合物被压制和烧结，或熔化以产生模拟废料。通过差示热分析评估玻璃的热稳定性。测定在pH为2-12的水溶液中的溶解速率。随着pH值的增加，溶解速度也增加。当添加氧化铀时，磷酸铌玻璃的化学耐久性没有明显改变。基于热稳定性，致密化和化学耐久性，磷酸铌烧结玻璃被认为是核废料的潜在候选者。

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