Accession Number:

AD0426665

Title:

RESEARCH AND DEVELOPMENT ON ADVANCED GRAPHITE MATERIALS. VOLUME XXI. CARBON ARC IMAGE FURNACE STUDIES OF GRAPHITE,

Descriptive Note:

Corporate Author:

IIT RESEARCH INST CHICAGO ILL

Personal Author(s):

Report Date:

1963-11-01

Pagination or Media Count:

49.0

Abstract:

Measurements obtained using a carbon arc image furnace indicate that the spectral reflectance and emissivity of carbon and graphite samples in the visible region of the spectrum are strong ly dependent on surface finish, but are indepen dent of temperature to at least 3000 K, regard less of surface finish. Descrepancies with other measurements of emissivity are indicated to be caused by errors in the measurement of surface temperature, due to thermal gradients. Infor mation has been obtained with the carbon arc image furnace indicating that the thermal con ductivity of surface mateepends strongly on surface finish and is smaller than the con ductivity of substrate material. Author

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Distribution Statement:

APPROVED FOR PUBLIC RELEASE