부산대학교 도서관

To link to full-text access for this article, visit this link: http://dx.doi.org/10.1016/j.cryogenics.2004.11.010 Byline: V. Musilova, P. Hanzelka, T. Kralik, A. Srnka Keywords: Metals (A); Structural materials (A); Radiant properties (C); Heat transfer (C); Cryostats (F) Abstract: Radiative heat transfer between two parallel surfaces, a sample surface and a black surface, was measured. One of the surfaces was cooled with liquid helium to about 5K and the other one was step by step heated to temperatures ranging between 30 and 140K. As a result, the total hemispherical absorptivity and emissivity of the sample surface were determined in dependence on the temperature of the heat radiation. Aluminium samples were made of Al sheet, Al foil and aluminized mylar. Further measurements were performed on sheets of aluminium alloy, Cu, zinc brass and stainless steel. The influence of different types of sample treatment such as chemical and mechanical surface finishing and material annealing on the radiative properties is presented. Author Affiliation: Institute of Scientific Instruments, Kralovopolska 147, Brno CZ-612 64, Czech Republic Article History: Received 16 August 2004; Revised 18 August 2004; Accepted 29 November 2004