Effects of electrode materials on freeze control of supercooled water by supplying electric field

摘要

In order to clarify effects of electric charge on freezing of supercooled water, experiments were carried out with various kinds of electrodes in supercooled water. Water sample was kept in a test tube and cooled down at a constant cooling rate. When the water sample was maintained under a supercooling state, an electric charge was applying to the water sample with a small electric current. The degree of supercooling was measured continuously. Then the degree of supercooling at freezing was determined. Six kinds of materials were used for electrodes. Those materials were Aluminum, Copper, Argentum, Aurum, Platinum and Carbon. It was found that the effects of electric charge were changed by each material of electrodes. The degree of supercooling at freezing is the lowest in the case of Aluminum. On the other hand, the highest value of the degree of supercooling at freezing is in the case of carbon. The reason for the difference of the degree of supercooling at freezing by six materials was discussed.