Istituto di Metodologie per l'Analisi Ambientale-IMAA-CNR, 85050 Tito Scalo, Italy.
Istituto di Struttura della Materia-ISM-CNR, 85050 Tito Scalo, Italy.
Molecules. 2018 Aug 23;23(9):2122. doi: 10.3390/molecules23092122.
Time-stability of LTA zeolite formed by hydrothermal method with or without the action of ultrasonic irradiation was investigated by X-ray diffraction analysis (XRD) and scanning electron microscopy (SEM). The results show that 6 months after the synthesis by hydrothermal process with continuous sonication, LTA evolves into a more stable sodalite, whereas no differences are detected 12 months after LTA synthesis by conventional pre-fused hydrothermal process. These data confirm that using the two approaches, different mechanisms control both zeolite crystallization and time-stability of the newly-formed mineral at solid state. The results are particularly important in the light of the synthetic zeolite application.
通过 X 射线衍射分析（XRD）和扫描电子显微镜（SEM）研究了水热法和超声辐照作用下形成的 LTA 沸石的时间稳定性。结果表明，在水热过程中连续超声 6 个月后，LTA 演变成更稳定的方钠石，而在传统预熔融水热法合成 LTA 12 个月后则没有差异。这些数据证实，使用这两种方法，不同的机制控制着沸石的结晶和新形成矿物在固态下的时间稳定性。鉴于合成沸石的应用，这些结果尤为重要。
