The area-density-dependence of Ball IR Black’s low-temperature emissivity

Autor:	Tracy Copp, J. G. Tuttle, Ed Canavan, Mike DiPirro, X. Li, Randy Franck, Mike Renbarger, Matt Hahn
Rok vydání:	2014
Předmět:	Cryostat Materials science Radiative cooling Infrared business.industry General Physics and Astronomy engineering.material Surface coating Optics Coating engineering Ball (bearing) Emissivity General Materials Science Area density Composite material business
Zdroj:	Cryogenics. 64:240-243
ISSN:	0011-2275
Popis:	Ball Infrared Black™, (BIRB) produced by Ball Aerospace and Technologies Corp, is a proprietary surface coating used in space-flight applications. It has a high total hemispheric emissivity at cryogenic temperatures, making it valuable for radiative cooling of components with very low operating temperatures. BATC is capable of controlling the mass per unit area of their BIRB coating, which impacts its effective thickness. In a previous publication we presented the results of total hemispheric emissivity measurements on a relatively high area-density coating of BIRB at temperatures between 300 and 20 K. These measurements were made in a small cryostat using a new technique. We have recently performed similar measurements on two lower area-density BIRB samples. The emissivity values for all samples were at least 0.95 between 30 and 300 K.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::289a54d33970ebd022373d55775543e9 https://doi.org/10.1016/j.cryogenics.2014.04.024 Zobrazit plný text záznamu Full Text from ScienceDirect