(中南大学 化学化工学院，长沙 410083)
摘 要:
采用自行研制开发的铝酸钠溶液电导在线跟踪仪，在过饱和铝酸钠溶液均相成核过程中，在线检测温度为323、328和333 K，苛性比为1.337，苛性钠初始浓度为50~
关键字: 铝酸钠溶液；均相成核；电导率仪；在线检测
（College of Chemistry and Chemical Engineering, Central South University, Changsha 410083, China）
Abstract:The homogeneous nucleation induction period of synthetic, optically clear caustic aluminate solution were investigated with the application of a self-made online conductivity analyzer. The experiments were performed at 323, 328 and 333 K and solution ratio of 1.337 with Na2Ok concentration in the range of 50−110 g/L. The results show that the nucleation kinetics are 6~8 orders dependence upon Al2O3 relative supersaturation and strong temperature effect, the critical interfacial energy is of 34−35 mJ/m2, the critical nucleus size is of 1.5−2.0 μm and the activation energy is of 50.2 kJ/mol. The mechanism of sodium aluminate solution nucleation is homogeneous and chemical reaction controlled.
Key words: sodium aluminate solution; homogeneous nucleation; conductivity analyzer; online detection
