A new high temperature design to determine electrical and thermal conductivities and thermoelectric power. Applications to the sintered composite AgNi (90/10) “pseudo-alloy”

The variation of resistivity and thermopower are represented and discussed. Our results show that the thermal conductivity of the Ag-Ni “pseudo-alloy” is only 10% below that of the best thermal conductor (pure silver). We also observe, after two temperature cycles up to 700 °C that the thermal conductivity increases of about 1%. We compare the SEM micrographs of the samples before and after heating. Finally we showed that the behavior of a pseudo-alloy is different from that of an alloy and we interprete this behavior semi quantitatively.