Abstract
The thermal conductivity and electrical resistivity of the tin-lead alloy system Sn x Pb1 − x (x = 0.85, 0.7 0.5 0.3) were measured in the temperature range 7–300 K. The thermal conductivity λ was analyzed at temperature T ≤20K, assuming 1/λ≡α/T+βTn, where α, β, and n are constants. The analysis shows that n < 2, and not n ≥ 2, which would be expected for a normal pure metal. The electrical resistivities could be represented by a T 5 relation for temperatures up to about 60 K. The characteristic temperature θ R appears to decrease with increasing weight percent of lead. The total Lorenz functions were high, indicating the presence of phonon conductivity. The phonon conductivity λ g appears to vary with T, and can be represented by λg=a/Tn (a > 0) and n≈2.
Published Version
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