Conductivity of Metallic Cryogenic Materials
As it is often important to have an approximate estimate of the thermal conductivity as a function of temperature for metals used in cryogenic design it is worth while to examine how well this conductivity can be predicted for a particular metal on the basis of the low and high temperature electrical resistivities which are relatively easily measured. We therefore wish to calculate the thermal conductivity k from the “residual” electrical resistivity due to impurities, ρ0, and the “ideal” resistivity due to thermal vibrations at room temperature, ρi(T1) assumed to be given by ρi(T1) = ρ(T1) — ρ0 (Matthiessen’s rule).
KeywordsThermal Conductivity Electrical Resistivity Elastic Scattering Pure Metallic Element Lattice Thermal Conductivity
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