Research of Ultra-Black Coating Emissivity Based on a Controlling the Surrounding Radiation Method

A method of controlling the surrounding radiation, proposed to measure the emissivity of the sample with high accuracy, is introduced. Two disks at different temperatures are moved alternately in front of the sample for controlling the surrounding radiation of the sample. The emissivity of the sampl...

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Bibliographic Details
Published in:International journal of thermophysics 2018-07, Vol.39 (7), p.1-10, Article 85
Main Authors: Song, J., Hao, X. P., Yuan, Z. D., Liu, Z. L., Ding, L.
Format: Article
Language:English
Subjects:
Classical Mechanics
Condensed Matter Physics
Disks
Emissivity
Geophysics
Humidity
Industrial Chemistry/Chemical Engineering
Moisture and Thermal Measurements in Industry and Science
Physical Chemistry
Physics
Physics and Astronomy
Scanning electron microscopy
Surface properties
Tempmeko 2016
TEMPMEKO 2016: Selected Papers of the 13th International Symposium on Temperature
Thermodynamics
Uncertainty analysis
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Summary:A method of controlling the surrounding radiation, proposed to measure the emissivity of the sample with high accuracy, is introduced. Two disks at different temperatures are moved alternately in front of the sample for controlling the surrounding radiation of the sample. The emissivity of the sample is obtained from the relationship between the measured value of the radiation thermometer and the radiation from the sample. There are three samples, including the Japansensor JSC-3, Tempil Pyromark 1200, and NEXTEL Velvet Coating 811-21 ultra-black coating, measured by this method. The uncertainty contributions of this method are analyzed, and the uncertainty of the emissivity measurement method is 0.54 % ( k  = 1). The surface microstructure of the coatings is measured by scanning electron microscopy, and the relationship between emissivity and the surface properties is discussed.
ISSN:0195-928X
1572-9567
DOI:10.1007/s10765-018-2404-1