(中南大学 化学化工学院， 长沙 410083)
摘 要: 运用分形动力学的方法考察了超声强化和温度对铝酸钠溶液种分过程的影响。通过SEM图象观察发现低频超声强化相在种分过程中晶种表面有大量次生晶核的生成；较低温度下(50℃)能明显加速铝酸钠溶液晶种分解；升高温度(60℃)虽然对铝酸钠溶液的种分热力学平衡不利，但由于温度升高，晶种表面活性增大，因而可以增大种分反应的谱维数，前期能够加快铝酸钠溶液晶种分解反应速率。实验表明超声强化在较低温度下强化效果较好，而升高温度较超声强化对种分影响更为显著。
关键字: 铝酸钠溶液；谱维数；超声波；温度
sodium aluminate liquor under ultrasound
（College of Chemistry and Chemical Engineering,
Central South University, Changsha 410083, China）
Abstract:Fractal kinetics was applied to study the spectral dimensions of the precipitaion of sodium aluminate liquor under ultrasound. Experiments show that the rate of precipitation under lower frequency ultrasound can be accelerated at lower temperatures. Higher spectral dimensions can be acquired and the pre cipitation of sodium aluminate liquor can be accelerated at the beginning of the period, although the higher temperature is disadvantagous for the thermodynamic al balance.
Key words: sodium aluminate liquor； spectral dimension； ultrasound； temperature
