Thermal control skin capable of adjusting equivalent emissivity by voltage and application thereof in spacecraft

Abstract

The present invention relates to a thermal control skin capable of adjusting equivalent emissivity by voltage and an application thereof in a spacecraft. The thermal control skin comprises a substrate, an inner layer, an outer layer and a protecting layer from bottom to top, and a spacer is arranged between the inner layer and the outer layer. The spacer forms a vacuum gap with a spacing of micro-nano scale between the inner layer and the outer layer. The inner layer and / or the outer layer comprises a metal-insulator-semiconductor structure, and direct current adjustable voltage is loaded between the semiconductor and the metal in the structure. The protecting layer has high infrared emissivity or both high infrared emissivity and low solar spectral absorptivity. On one hand, the thermal control skin has good adaptability to a space environment, and solves the problem of performance degradation caused by direct exposure of electrochromic material to the space environment, and on the other hand, the thermal control skin can provide a large emissivity adjustment range and can be applied to the spacecraft.

Description

technical field [0001] The invention relates to the technical field of thermal control devices, in particular to a thermal control skin whose equivalent emissivity can be adjusted by voltage and its application in spacecraft. Background technique [0002] The spacecraft thermal control technology uses various surface materials and temperature control devices to keep the spacecraft and internal components in the desired temperature environment, which is of great significance to ensure the normal operation of the spacecraft’s internal components. In many thermal control technologies such as electrochromism, thermal phase change, MEMS shutters, etc., electrochromic thermal control uses the principle of electrochromism to change the light and thermal characteristics of materials through external voltage, thereby adjusting the reflectivity of thermal control devices Or emissivity, which has the advantages of real-time active adjustment, large emissivity adjustment range, and low ...

AI Technical Summary

Problems solved by technology

[0003] Although the electrochromic thermal control has a wide range of emissivity adjustment, electrochromic materials must be used, and the selection range of materials is small

Moreover, many electrochromic materials have poor chemical stability and cannot withstand the erosion caused by high vacuum, ultraviolet radiation, atomic oxygen, etc., and the dimensional stability of thermal control devices cannot be guaranteed.

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