Evaporated Ag coated with double layers of Al2O3 and silicon oxide to produce surface films with low solar absorptivity and high thermal emissivity |
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| Authors: | G Hass JB Heaney JJ Triolo |
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| Institution: | U.S. Army Electronics Command, Night Vision Laboratory, Fort Belvoir, Virginia 22060, USA;NASA Goddard Space Flight Center, Greenbelt, Maryland 20771, USA |
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| Abstract: | A technique using evaporated Ag coated with double layers of Al2O3 and silicon oxide to produce surface films having low solar absorptivity (α) and high total normal and hemispherical emissivities (?N and ?) is described. α of the Ag + Al2O3 + silicon oxide film combination was determined to be less than 0.07 and α/? values of 0.1 could be readily achieved. Surface films of this type were found to be extremely stable during simulated solar uv irradiation. |
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