Abstract

Using a transient calorimetric technique, the total hemispherical emissivities ∊_h of very pure copper, aluminum, and silver have been measured at various temperatures in the range 335–1100°K. By carrying out measurements on a sphere, a thin circular disk, and a thin square plate all made of the same copper sample, it is shown that the measured ∊_h is practically independent of the shape of the specimen. Measured ∊_h values of Cu, Al, and Ag show considerable departure from the theoretical predictions of Davisson and Weeks and the data of previous investigators. ∊_h data are presented in tabular form at 20°K intervals for all three materials in the range 400–1000°K.

© 1977 Optical Society of America

Low-temperature emissivities of copper and aluminum

Edward A. Estalote and K. G. Ramanathan
J. Opt. Soc. Am. 67(1) 39-44 (1977)

Total hemispherical emissivities of copper, aluminum, and silver

K. G. Ramanathan, S. H. Yen, and E. A. Estalote
Appl. Opt. 16(11) 2810-2817 (1977)

Temperature variation of total hemispherical emissivity of stainless steel AISI 304

C. R. Roger, S. H. Yen, and K. G. Ramanathan
J. Opt. Soc. Am. 69(10) 1384-1390 (1979)

Emissivities of Copper and Aluminum

George Best
J. Opt. Soc. Am. 39(12) 1009-1011 (1949)

Total hemispherical emissivity of tungsten

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