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Thermal conductivity of the solidified inert gases: Argon, neon and kryptont

1958; Taylor & Francis; Volume: 3; Issue: 32 Linguagem: Inglês

10.1080/14786435808237015

0031-8086

G. K. White, S. B. Woods,

Geothermal Energy Systems and Applications

Abstract The thermal conductivity of the solidified inert gases A, Ne and Kr, contained in an Inconel tube, has been measured at temperatures from 2°K to near their melting points. Above about 15°K, we find that the thermal conductivity, Δ may be represented by the expression Λ≃B/T, where B has values of 260 mw cm−1 for A, 75 for Ne, and 270 for Kr. Values calculated from approximate theoretical treatments of lattice anharmonicity yield values in excess of these by about 30% to 80%. At liquid helium temperatures, i.e. below the conductivity maximum, we find that Λ varies approximately as T 2 and is small in magnitude, suggesting mean free paths of 10−5 to 10−4 cm for the lattice waves. This may result from the large contraction of the solids during cooling which produces severe internal strains and probably results in many lattice defects within the crystals.