Method for measuring diffusion coefficient of chemical species in material e.g. clay, in nuclear waste storage application, involves measuring intensity of electric current signal, and calculating diffusion coefficient of ion

摘要

The method involves generating an electric field of a material from two electrodes so as to cause a migration of a chemical ion between the electrodes. Intensity of an electric current signal generated between the electrodes is measured in response to the applied electric field. A diffusion coefficient of the ion is calculated from a following equation containing parameters selected from electrical potential difference, average temperature of the solution, a characteristic surface of the material and valence of the ion.