Can anyone recommend a source of emissivity data for aluminum and aluminized Mylar at room temperature, 77K and 4.2K? Also, I would be interested in finding a facility that can measure this information. Any information will be greatly appreciated.
William Einziger, GE Healthcare
1 Comment
From Tomas Kralik, PhD, Institute of Scientific Instruments of the ASCR, v.v.i
January 6, 2010Our Group of Cryogenics at the Institute of Scientific Instruments can do measurements of the total hemispherical emissivity or absorptivity in the range from 20K to 300K. We can measure thermal radiative properties of dielectric or metallic materials which can be placed in vacuum and withstand cryogenic conditions.
Some references and examples of our data can be found in the following references: Musilova, V., Hanzelka, P., Kralik, T., Srnka, A. “Low temperature radiative properties of materials used in cryogenics.” Cryogenics, 2005, vol. 45, no. 8, pp. 529-536. ISSN 0011-2275; Musilova, V., Kralik, T., Hanzelka, P., Srnka, A. “Effect of different treatments of copper surface on its total hemispherical absorptivity bellow 77K.” Cryogenics, 2007, vol. 47, no. 4, pp. 257-261. ISSN 0011-2275; Hanzelka, P., Kralik T., Maskova A., Musilova V., Vyskocil J. “Thermal radiative properties of a DLC coating.” Cryogenics, 2008, vol. 48, no. 9-10, pp. 455-457. ISSN 0011-2275.