Measurement of the Thermal Conductivity of Neon Using Hot-Wire-Type Thermal Diffusion Columns

Abstract

The thermal conductivity of neon is measured on two hot-wire-type thermal diffusion columns which are alike except for length. This has enabled a more explicit analysis of the so-called “end effects.” Convection and temperature jump effects are investigated experimentally by taking measurements for several values of gas pressure. The data are reported in the temperature range from 100° to 1200°C and these can be correlated by a quadratic polynomial in temperature (T), viz., λ × 105 = 4.68 + 2.62 × 10−2T − 4.40 × 10−6T2. Here λ is in cal cm− 1·sec− 1·deg− 1 and T is in degrees Kelvin. The present data are estimated to have an error of about ±2% and within this scatter these agree with the predictions of the theory and also with most of the available measurements. This technique appears very promising for generating data in a temperature range where none of the established techniques work satisfactorily.