Relation between electromagnetic emission and growth kinetics of polycrystalline ice

Continuous (in the form of the noise) and discrete (in the form of successi ve pulses) electromagnetic emission accompanying crystallization of distill ed water has been studied. It was shown that majority of pulses of duration about 100 ms are directly associated with growth of polycrystalline ice an d reflect the nonsteady-state nature of the crystallization process at the mesoscopic structural level. The minority of pulses of duration about 1-10 mu s are caused by the evolution of growth cracks. The results obtained all owed us to develop a new fast in situ method for studying the crystallizati on kinetics of dielectrics and the accompanying crack formation-the analysi s of electromagnetic emission spectra.