Abstract
The thermal conductivity of alloys of niobium containing 0.2 and 2% of zirconium in the normal and superconducting states between 1.6 and 12 deg K was investigated to determine the effect of impurities. The smoothed values of the thermal conductivity in the normal and superconducting states were plotted against temperature. The normal state conductivity could be accounted for by electron scattering by point defects. The electron and phonon contributions to the specific heat in the superconducting state were calculated and at the lowest temperatures the specific heat. due primarily to phonons, was proportional to the square of the temperature as would be expected if the scattering were limited by dislocations. (C.E.S.)
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