A method for the determination of diffusion - and / or a material exchange coefficients as compared

摘要

A method for the determination of diffusion - and / or a material exchange coefficients as compared with electronic and ionic conductivity for a gas, for which the material is permeable, in whicha sample of the material is arranged in a measuring chamber and of an electric current for a determination of the electrical resistance flows; in this casea gas mixture, in which the respective gas is contained, as a gas flow through the measuring chamber is guided;the partial pressure of the respective gas in the gas mixture and regularly changed periodically in this case, the change of the electrical resistance of the sample is measured and from the determined change of the electrical resistance diffusion - and / or exchange coefficient of the material for the respective gas is / are determined.