多価金属中の貴金属の固溶度 : Pb-Ag系の場合

概要

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The values of the solid solubility limit of silver in lead at various temperatures were determined from the resistivity versus temperature curves obtained from the specimens annealed at various temperatures for long periods enough to complete the precipitation of the equilibrium phase Ag (Pb) solid solution and quenched to low temperature. From the obtained solid solubility, the thermodynamic properties associated with the solution of silver in this system were calculated as follows; the relative partial molal entropy change ΔS^^-/k is 4.05±0.03 and that of enthalpy change ΔH^^-_<Ag> is 0.51±0.004 eV. The residual resistivity in this case also is give, as 4.94μohm・cm/at% Ag. Comparing these values with that of such other fifth periodic elements as cadmium, indium and tin, the interstitial fraction of dissolved silver can be considered as very small, in comparison with that of copper or gold, and is almost the same degree as cadmium in lead.
明治大学の論文