Spectral Emissivities of Graphite and Carbon
作者:
R. J. Thorn,
O. C. Simpson,
期刊:
Journal of Applied Physics
(AIP Available online 1953)
卷期:
Volume 24,
issue 5
页码: 633-639
ISSN:0021-8979
年代: 1953
DOI:10.1063/1.1721341
出版商: AIP
数据来源: AIP
摘要:
The spectral emissivities of graphite and carbon have been determined at a wavelength of 0.653&mgr; in the temperature range of 1285 to 2035°K and have been found to be temperature dependent in accordance with a prediction from a relation between reflectivity and resistivity. For polished graphite of high purity having a resistivity of about 1120 microhm‐cm the value obtained is 0.78; the value obtained for a polished high density graphite having a resistivity of 1740 microhm‐cm is 0.78; and that for polished spectroscopic carbon having a resistivity of 5080 microhm‐cm is 0.79. If graphite is sublimed from a polished surface, the latter becomes roughened, so that the emissivity increases. In one particular experiment it attained a value of 0.90.
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