Effect of interfacial supersaturation on secondary nucleation

A stirred tank was used to study the effect of interfacial supersaturation on secondary nucleation. The experiment was performed by the injection of solution to a seed crystal surface and thus to induce secondary nuclei. The distance between the jet and the seed crystal and the stopping time, which was the time interval between starting injection and stopping agitation, were varied to show the difference in the number of crystals generated by secondary nucleation. From the two-step crystal growth model, the interfacial supersaturation decreases with an increase in stopping time, thus the secondary nucleation is influenced by the interfacial supersaturation.