The experimental measurement of the thermal emissivity of a black coating from 50 K to 300 K. Issue 1 (1st May 2022)

• Record Type: Journal Article
• Authors: Zhang, S Y; Shen, F Z; Liu, H M; Huang, C J; Li, L F
• Is Part Of: IOP conference series. Volume 1241:Issue 1(2022)
• Publication Date: 2022-05-01
• Subjects: Materials science -- Periodicals; 620.1105
• DOI: 10.1088/1757-899X/1241/1/012053
• Languages: English
• ISSNs: 1757-8981

Abstract

Abstract: High-emissivity coatings are commonly applied in satellite detectors and large-scale cryogenic systems. Accurate and quick measurement of emissivity is in high demand for practical applications at cryogenic temperatures. In this paper, a method for the measurement of the total hemispherical emissivity from 50 K to 300 K was presented based on the static calorimetric method. A two-stage GM cryocooler was used as a cooling source in the measuring device without assumption of cryogenic liquids. The thermal emissivity of a black carbon coating was measured by monitoring temperatures timely in the device. The tested results exhibited good accordance with previous reports. This cryogenic measurement device has made it a strong candidate for the radiative heat dissipation at cryogenic temperatures. Design details of the experiment and measurement results will be presented.