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Total hemispherical emissivities of copper, aluminum, and silver
Abstract
The temperature variation of the total hemispherical emissivities of Cu, Al, and Ag has been studied by using a temperature decay method in the 150-1000-K range. The results obtained are found to support, for the first time, a classical relaxation theory developed by Parker and Abbott. The experimental emissivity data are used to calculate the emissive relaxation times tau for Cu, Al, and Ag at various temperatures in this range. These tau values are found to be practically insensitive to temperature, a behavior contrary to that shown by the electrical relaxation times calculated from the resistivity vs temperature data of these metals.
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Ramanathan et al. demonstrated that the emission relaxation time of copper, aluminum, and silver remained largely independent of temperature.
“The study demonstrated that the “emission relaxation time” of the materials remained largely independent of temperature, indicating strong temperature insensitivity.”
From Thermal Radiation Testing Methods at Cryogenic Temperatures: A Review (2026) · cites this paper as [36]
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Research works printed but not linked: 6
- Davisson, 1924, J. Opt, Soc. Am., 8, 581, 10.1364/JOSA.8.000581 · DOI
- Ramanathan, 1977, J. Opt. Soc. Am., 67, 32, 10.1364/JOSA.67.000032 · DOI
- Estalote, 1977, J. Opt. Soc. Am., 67, 39, 10.1364/JOSA.67.000039 · DOI
- Best, 1949, J. Opt. Soc. Am., 39, 1009, 10.1364/JOSA.39.001009 · DOI
- Zuppardo, 1971, J. Opt. Soc. Am., 61, 1607, 10.1364/JOSA.61.001607 · DOI
- Pawlek, 1966, Cryogenics, 6, 14, 10.1016/S0011-2275(96)90056-9 · DOI
Cited by
Sorted by citations
Thermal Radiation Testing Methods at Cryogenic Temperatures: A Review
Li, B., & Shen, F. (2026) · Cryo · doi:10.3390/cryo2010004 · Cited by 1
Metadata
- Authors
- Ramanathan, K. G., Yen, S. H., & Estalote, E. A.
- Venue
- Applied Optics
- Publisher
- Optica Publishing Group
- Published
- 1977-11-01
- Volume
- 16
- Issue
- 11
- Pages
- 2810
- ISSN
- 0003-6935
- 1539-4522
- Cited by
- 37
- References
- 0
- Language
- en
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