Investigation of Growth Instabilities of the Ice-Water Interface by Light Scattering Spectroscopy

摘要

The growth of a pure single crystal of ice into its own melt under a temperature gradient leads to enhanced scattering of light at the ice-water interface. This anomalously intense scattering of light develops when the crystal growth velocity exceeds 0.6 micrometers/sec. Even though the scattering phenomenon occurs as soon as the dynamic stationary state interface has developed, the ice phase which has been overtaken by this surface exhibits no anomalous scattering. Experiments have been conducted to measure the angular dependence of decay time associated with scattering and the long term development of this interfacial phenomenon. Scattering does not occur in the liquid phase under given supercooling and temperature gradient if the interface is absent. The phenomenon of ice crystallization is potentially a technically feasible approach for water purification and desalination.