Abstract

Using an optical pyrometer method, the thermal conductivity of tungsten has been found to vary linearly from 1.170 watts/(cm² K°/cm) at 1100°K to 1.026 watts/(cm² K°/cm) at 2000°K. Similarly, the thermal conductivity of molybdenum has been found to vary linearly from 1.083 watts/(cm² K°/cm) at 1200°K to 0.666 watt/(cm² K°/cm) at 1900°K. Spectrographic analysis indicated only traces of impurities in samples of the two metals used in the investigation.

© 1941 Optical Society of America

Deviation from Lambert’s Law and Polarization of Light Emitted by Incandescent Tungsten, Tantalum and Molybdenum and Changes in the Optical Constants of Tungsten with Temperature*

A. G. Worthing
J. Opt. Soc. Am. 13(6) 635-649 (1926)

The Spectral Emissivity and the Relation of True Temperatures and Brightness Temperatures of Platinum

Robert E. Stephens
J. Opt. Soc. Am. 29(4) 158-161 (1939)

Total hemispherical emissivity of tungsten

D. P. Verret and K. G. Ramanathan
J. Opt. Soc. Am. 68(9) 1167-1172 (1978)

Radiant Energy Measurements with Thermopiles

N. C. Beese
J. Opt. Soc. Am. 31(11) 705-708 (1941)

An Incandescent Tungsten Source for Infrared Spectroscopy*

J. H. Taylor, C. S. Rupert, and John Strong
J. Opt. Soc. Am. 41(9) 626-629 (1951)