Temperature- and Concentration-dependency of the Electrical Resistivity of Molten Ag-Mg-, Cu-Sb-, and Zn-Sn-alloys

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Abstract
The electrical resistivity was measured in the liquid systems Ag-Mg, Cu-Sb, and Zn-Sn. With the eutectic system Zn-Sn the resistivity shows a convex smooth run between the values of the pure components. With the systems Cu-Sb and Ag-Mg the resistivity shows maxima at the concentrations of the solid intermetallic compounds. The relative superelevation of these maxima decreases with rising temperature, corresponding to the decay of “compound-molecules” in the melt. With the system Zn-Sn the small maxima found by Roll and Motz could not be confirmed. Also no influence of the magnetic susceptibility on the run of resistivity vs. concentration could be detected during the measurements in a rotating field apparatus. A convincing consistency of the measured values of the electrical resistivity in the system silver-magnesium with those values, which were obtained by calculation from X-ray data is shown.

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