Abstract
The ionic Seebeck coefficients of Cu2−δSe superionic conductors are measured in the temperature range 340–380°C. The data obtained are used to determine the heat of transfer Q i of copper ions as a function of the degree of nonstoichiometry and the temperature. The heat of transfer of copper cations increases from 0.19 to 0.22 eV as the degree of nonstoichiometry δ increases from 0.015 to 0.050. It is noted that the heat of transfer Q i tends to increase with an increase in the temperature. Assumptions regarding the specific features of the cation diffusion in the Cu2−δSe superionic conductors are made from the observed closeness of the heat of transfer and the activation energy for ionic conduction.
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