Title: THERMAL EMITTANCE OF THIN FILMS FOR MULTILAYER INSULATION SYSTEMS
Abstract: Thermal radiation properties of solid films play an important role in many technological applications such as low-temperatu re insulation systems, solar collectors and thermal control of space vehicles. In this paper, an investigation of spectral normal and total normal emittance of thin coating layers on a metal substrate has been carried out on the basis of the electromagnetic theory. Various combinations of metallic (gold, rhodium, platinum) and nonmetallic (silicon oxide and dioxide) coatings on a nickel substrate, with different values of the coating thickness, were investigated. The aim of the work concerns the analysis of the substrate/coatings combinations that are suitable for the required performance (low emittance, low weight, low degradation of radiant properties in use) in different temperature ranges. Total normal emittance measurements were also performed on two samples and the results showed a good agreement with the theoretical calculations.
Publication Year: 2002
Publication Date: 2002-01-01
Language: en
Type: article
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