Monoclinic SrAl₂Si₂O₈ ceramics for Sr immobilization were prepared by a liquid-phase sintering method. The sintering temperature, mineral phase composition, microstructure, flexural strength, bulk density, and Sr ion leaching characteristics of the SrAl₂Si₂O₈ ceramics were investigated. A crystalline monoclinic SrAl₂Si₂O₈ phase formed through liquid-phase sintering at 1223 K. The introduction of four flux agents (B₂O₃, CaO·2B₂O₃, SrO·2B₂O₃, and BaO·2B₂O₃) to the SrAl₂Si₂O₈ ceramics not only reduced the densification temperature and decreased the volatilization of Sr during high-temperature sintering but also impacted the mechanical properties of the ceramics. Product consistency tests showed that the leaching concentration of Sr ions in the sample with flux agent B₂O₃ was the lowest, whereas that of Sr ions in the sample with flux agent BaO2B₂O₃ was the highest. These results show that the leaching concentration of Sr ions depends largely on the amorphous phase in the ceramics. Meanwhile, the formation of mineral analog ceramics containing Sr is an important factor to improve Sr immobilization.

采用液相烧结法制备了用于Sr固定化的单斜SrAl ₂ Si ₂ O ₈陶瓷。研究了SrAl ₂ Si ₂ O ₈陶瓷的烧结温度，矿物相组成，显微组织，抗弯强度，堆积密度和Sr离子浸出特性。通过在1223 K下进行液相烧结形成结晶的单斜晶SrAl ₂ Si ₂ O ₈相。引入了四种助熔剂（B ₂ O ₃，CaO·2B ₂ O ₃，SrO·2B ₂ O ₃和BaO·2B₂ O ₃）注入SrAl ₂ Si ₂ O ₈陶瓷不仅降低了致密化温度并降低了Sr在高温烧结过程中的挥发，而且还影响了陶瓷的机械性能。产品一致性测试表明，使用助熔剂B ₂ O ₃的样品中Sr离子的浸出浓度最低，而使用助熔剂BaO2B ₂ O ₃的样品中Sr离子的浸出浓度最低。是最高的。这些结果表明，Sr离子的浸出浓度很大程度上取决于陶瓷中的非晶相。同时，含Sr的矿物模拟陶瓷的形成是提高Sr固定化的重要因素。