A method for predicting performance degradation of thin-film thermal control coatings under near-ultraviolet radiation

A technology of thermal control coating and prediction method, which is applied in the field of space environment engineering, can solve the problems of increasing solar absorption ratio and reducing optical performance, etc., and achieve the effect of improving test efficiency and saving test cost

Active Publication Date: 2021-02-02
LANZHOU INST OF PHYSICS CHINESE ACADEMY OF SPACE TECH
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Problems solved by technology

Thin-film thermal control coatings exposed to ultraviolet radiation for a long time will increase their solar absorption ratio and reduce their optical properties, and the degradation of optical properties is a problem that needs to be considered and evaluated for thermal control coatings

Method used

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  • A method for predicting performance degradation of thin-film thermal control coatings under near-ultraviolet radiation
  • A method for predicting performance degradation of thin-film thermal control coatings under near-ultraviolet radiation
  • A method for predicting performance degradation of thin-film thermal control coatings under near-ultraviolet radiation

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Embodiment 1

[0041]A method for predicting the performance degradation of a thin film thermal control coating under near ultraviolet radiation, specifically a method for predicting the change of the solar absorption ratio α of the thin film thermal control coating under near ultraviolet radiation with the near ultraviolet radiation amount t (ESH).

[0042]A near-ultraviolet radiation test was carried out for aluminized polyimide film. The radiation source was a mercury-xenon lamp, the acceleration factor was 4 to 5 times, and the total radiation was 15000ESH. This is to obtain the difference between the solar absorption ratio of the material and the near ultraviolet radiation. Change relationship, in the experiment, set multiple test points, including 0, 100, 200, 300, 400, 500, 750, 1000, 1250, 1500, 1750, 2000, 2250, 2500, 2750, 3000, 3500, 4000, 4500, 5000, 5500, 6000, 6500, 7000, 8000, 9000, 10000, 12000, 14000 and 15000 (all units are ESH).figure 2 It is a graph of the relationship between sol...

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Abstract

The invention discloses a film thermal control coating near ultraviolet radiation performance degradation predicating method. The film thermal control coating near ultraviolet radiation performance degradation predicating method helps study the law of performance degradation under near ultraviolet radiation under the condition of grasp of the near ultraviolet radiation degradation mechanism to establish a performance degradation model, and takes the results of a short cycle on the ground as the basis to extrapolate the degradation result of material performance under long-time near ultravioletradiation in space; the film thermal control coating near ultraviolet radiation performance degradation predicating method can predict the performance degradation of a long-life aircraft film thermalcontrol coating under near ultraviolet radiation through a short-cycle ground-based simulation test, thereby improving the testing efficiency, saving the testing cost and providing technical supportfor reliability design of the film thermal control coating.

Description

Technical field[0001]The invention belongs to the technical field of space environmental engineering, and specifically relates to a method for predicting performance degradation of a thin film thermal control coating under near ultraviolet radiation.Background technique[0002]The satellite thermal control system is an important system to ensure that various devices and instruments in the satellite can work in a relatively stable temperature environment, and the thermal control coating is the most widely used coating material in the satellite thermal control system. The key to passive thermal control of satellites. There are many types of thermal control coatings, and paint-type coatings and secondary surface mirror coatings are most used in domestic and foreign spacecraft. The secondary surface mirror-type thermal control coating is composed of a thin film material and a vacuum coating metal bottom layer. Due to the small quality of the secondary surface mirror of plastic film, easy ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N17/00G06F30/20
CPCG01N17/004G06F30/20G06F2119/04
Inventor 杨生胜田海薛华把得东冯展祖
Owner LANZHOU INST OF PHYSICS CHINESE ACADEMY OF SPACE TECH
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