Abstract

The influence exerted by the composition of ceramics with imitators of radioactive wastes (Nd, U) on their stability against leaching in water at 90 and 150°C has been studied. Raising the content of TiO₂ in a ceramic with Nd led to an increase in the fraction of perovskite and decrease in the amount of murataite. Samples with perovskite have the lowest stability in solution, especially at 150°C. Making smaller the fraction of perovskite lowers the rate of Nd leaching by a factor of 2 (90°C) and 5 (150°C). The weaker influence exerted by temperature on the U leaching from the samples is observed because more stable pyrochlore or zirconolite appear in the samples instead of perovskite.

中文翻译：

---

村田基陶瓷的相组成和水热稳定性

摘要

研究了具有放射性废物（Nd，U）的模拟物的陶瓷成分对它们在90和150°C的水中浸出稳定性的影响。用Nd提高陶瓷中TiO ₂的含量会导致钙钛矿分数的增加和绢云母数量的减少。钙钛矿样品在溶液中的稳定性最低，尤其是在150°C下。减小钙钛矿的比例会使Nd的浸出速率降低2倍（90°C）和5倍（150°C）。观察到温度对样品中U浸出的影响较小，因为样品中出现的烧绿石或锆石更稳定而不是钙钛矿。