IN SITU MEASUREMENTS OF SPECTRAL REFLECTANCE OF THERMAL CONTROL COATINGS IRRADIATED IN VACUO

1967 ◽  
pp. 281-296 ◽  
Author(s):  
P.R. Cheever ◽  
J.K. Miles ◽  
John Romanko
Keyword(s):  
Spectral Reflectance ◽  
Thermal Control ◽  
In Situ Measurements ◽  
Thermal Control Coatings

White Anodic Coatings on Aluminum Alloy with Low Ratio of Solar Absorptance to Infrared Emittance

2007 ◽  
Vol 336-338 ◽  
pp. 643-646
Author(s):  
Wei Qin ◽  
Bo Cui ◽  
Xiao Hong Wu ◽  
Zhao Hua Jiang
Keyword(s):  
Optical Properties ◽  
Aluminum Alloy ◽  
Low Cost ◽  
Thermal Control ◽  
Space Environment ◽  
Space Applications ◽  
Solar Absorptance ◽  
Thermal Control System ◽  
Thermal Control Coatings

White anodic coatings are gained by growth in situ on the aluminum alloy. The coatings possess stable optical properties, excellent adhesive power, low cost, stability in the space environment, and so on, which can be widely used in the thermal control system of spacecrafts. In this article, the developed Al2O3 thermal control coatings that had a low solar absorptance and a high infrared emittance were gained in the electrolyte of sulfuric acid. The influences of various process parameters, such as electrolyte temperature, current density, anodizing time, on the optical properties of the coatings were investigated. AFM and XRD were used to characterize the microstructure of the coatings. Experimental results show the anodic coatings could reach a solar absorptance value lower than 0.20 and an infrared emittance higher than 0.80. Therefore, the coatings can be applied as important thermal control coatings for space applications.

scholarly journals In situ measurements of the spectral reflectance of metallic mirrors at the Hα line in a low density Ar–H plasma

2018 ◽  
Vol 89 (6) ◽  
pp. 063112 ◽  
Author(s):  
Sven Dickheuer ◽  
Oleksandr Marchuk ◽  
Christian Brandt ◽  
Albrecht Pospieszczyk ◽  
Andrei Goriaev ◽  
...  
Keyword(s):  
Spectral Reflectance ◽  
In Situ Measurements ◽  
Low Density
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