Absorptivity and emissivity of metal and deposited coating on metals
From Thermal-FluidsPedia
MATERIAL Solar Normal
Total Absorptivity
αn, solarTotal Hemispherical Emissivity at Moderate Temperature ε
Aluminum, polished 0.10 0.018 * 5.6 Chromium, polished 0.415 0.08 5.2 CrOx on aluminum foil 0.964 0.023 42 Copper, polished 0.29 0.019 * 15 CuO on aluminum sheet 0.90 0.15 6.0 Gold, polished 0.19 0.018 * 11 Iron, polished 0.445 0.05 * 8.9 Nickel, polished 0.15 0.04 * 3.8 NiS+ZnS on steel 0.88 0.10 8.8 Nickel dendrites on stainless steel 0.99 0.26 3.8 Platinum, polished 0.307 0.050 * 6.1 Silver, polished 0.07 0.017 * 7 Stainless steel, 301 0.37 0.05 * 7.4 Titanium 0.63 0.134 * 4.7 Tungsten, polished 0.37 0.03 * 12 Zinc oxide on stainless steel 0.95 0.08 11.6 Steel
References
Agnihotri, O.P. and Gupta, B.K., 1981, Solar Selective Surfaces, John Wiley & Sons, New York.
Faghri, A., and Zhang, Y., 2006, Transport Phenomena in Multiphase Systems, Elsevier, Burlington, MA.
Faghri, A., Zhang, Y., and Howell, J. R., 2010, Advanced Heat and Mass Transfer, Global Digital Press, Columbia, MO.
Siegel, R. and Howell, J.R., 2002, Thermal Radiation Heat Transfer, Taylor and Francis, New York.
Touloukian, Y.S. and DeWitt, D.P., (eds.), 1970-[79], Thermophysical Properties of Matter, Vol. 7, Thermal radiative properties: metallic elements and alloys, and Vol. 8. Thermal radiative properties: non-metallic solids, IFI/Plenum, New York.