Induction period of nucleation and metastable zone width

Abstract

Induction periods of nucleation and metastable zone width were measured for the system KCl-H2O at 40 °C. The data for the induction period measured at constant undercooling produced at a finite rate were treated using relationships allowing for the time period of lower supersaturation. The relation NN = 1/tN has been found to apply to the system studied. The treatment of literature data for metastable zone width and induction period of nucleation in the systems KAl(SO4)2-H2O and (NH4)2Ni(SO4)2-H2O showed satisfactory agreement between values of nucleation exponent obtained by the two methods.