Isothermal calorimetric studies of crystal nucleation and growth processes in the aqueous LiCl-H2O system and the model glass-forming ionic system Ca(NO3)2-KNO3 have been investigated. For LiCl-H2O it is demonstrated that the results obtained by using emulsion samples, which protect against heterogeneous nucleation artifacts, can be reproduced by using bulk samples. For the Ca(NO3)2-KNO3 system some interference from heterogeneous nucleation is observed, but results of character rather similar to those in LiCl-H2O are obtained. These are refined by the use of two different two-step observation schedules which probe the relation between nucleation-dominated and growth-dominated regimes. The results make it possible to compare the crystallization kinetics in aqueous solutions and ionic melts and contrast them with molten fluoride systems of previous studies.
|Original language||English (US)|
|Number of pages||5|
|Journal||Journal of physical chemistry|
|State||Published - Jan 1 1991|
ASJC Scopus subject areas
- Physical and Theoretical Chemistry