Accession Number : AD0426665


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


Corporate Author : IIT RESEARCH INST CHICAGO ILL


Personal Author(s) : Null,M R ; Lozier,W W


Report Date : Nov 1963


Pagination or Media Count : 49


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)


Descriptors :   *CARBON , REFLECTION , HEATING , LABORATORY FURNACES , SUBLIMATION , OXIDATION


Distribution Statement : APPROVED FOR PUBLIC RELEASE