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Emittance characterization of thermal control paints, coatings and surfaces using a calorimetric techniqueThermal control surfaces are used in every spacecraft thermal management system to dissipate heat through radiant heat transfer. This paper describes the thermal performance of several thermal control paints, coatings, and surfaces, as characterized by a calorimetric vacuum emissometer. The emissometer is designed to measure the functional emittance of a surface based on heat transfer from an underlying substrate to the surface and from the surface or near surface to a surrounding cold wall. Emittance measurements were made between 200 and 350 K. Polished aluminum, used here as a standard, was found to have a total hemispherical emittance of 0.06, as expected. A velvet black paint, also used here as a standard, was found to have an emittance of 0.94 at room temperature. Other surfaces of interest included a polyurethane-based black paint designated Z-306, a highly polished 316L stainless steel, and an atomic oxygen beam-textured carbon-carbon composite.
Document ID
19950062370
Document Type
Reprint (Version printed in journal)
Authors
Jaworske, Donald A. (NASA Lewis Research Center Cleveland, OH 44135, United States)
Date Acquired
August 16, 2013
Publication Date
December 15, 1994
Publication Information
Publication: Thin Solid Films
Volume: 253
Issue: 1-2
ISSN: 0040-6090
Subject Category
SOLID-STATE PHYSICS
Distribution Limits
Public
Copyright
Other