Coating type wave-absorbing component used in high-vacuum condition

Abstract

The invention provides a coating type wave-absorbing component used in high-vacuum condition. The wave-absorbing component comprises a structuralized base plate and a wave-absorbing coating, wherein the wave-absorbing coating is sprayed on the outer surface of the structuralized base plate; the structuralized base plate is made of an aluminum material in a die-cast formation mode, so that good heat conduction property is achieved; the wave-absorbing coating has good wave-absorbing property and can be used in a high-vacuum environment. By optimizing the wave-absorbing coating ratio and reducing the volatility of the material, the vacuum application requirements can be met, and the wave-absorbing component can be applied to construction of a vacuum-resisting controllable temperature microwave anechoic chamber. By optimizing the substrate size in structural design, adjusting the ratio of the wave-absorbing coating and the coating thickness, and spraying for multiple times, the wave-absorbing property of the structuralized coating type wave-absorbing component is optimized within a target frequency band. Through the optimized structural design, a metal material with high heat conduction rate is adopted inside, and the wave-absorbing coating is sprayed on the surface of a metal substrate, the wave-absorbing component has good wave-absorbing property and excellent heat conduction property, and precise external heat flow analog can be achieved.

Description

technical field [0001] The invention relates to the technical field of wave-absorbing materials, in particular to a coating-type wave-absorbing component used in high vacuum conditions. Background technique [0002] As the load of the space vehicle, the antenna has a large starting power, and the thermal design of the space vehicle needs to be paid attention to. The heat sink inside the space environment simulator, the wall of the vacuum container, and the tooling spreader are all made of metal materials. Metal materials have a good reflection effect on microwaves. The microwaves emitted by the antenna must be reflected back at a large rate. If the reflected microwaves If the power exceeds a certain amount, it may cause damage to the sensitive components of the receiving antenna. Therefore, in order to prevent the reflected microwave from interfering with its normal operation, it is usually necessary to modify the antenna and install a wired load to absorb microwave energy,...

AI Technical Summary

Problems solved by technology

[0003] 1) The refitting work increases the workload of the test, and as the complexity of the new generation of products increases significantly, the products become smaller and smaller. On the one hand, refitting will become very difficult. On the other hand, even if refitting is performed, due to the small and fragile components, There are great risks in the modification process. The state before and after disassembly may not be consistent or even reduce the reliability of the product. The complexity of the newer generation of products under pre-research has increased several times, and the process delay caused by disassembly and assembly of wired loads and safety risks will be unacceptable, therefore, it is difficult for the new generation of products to follow the original test method;

[0004] 2) Refitting the spacecraft changes the real state of the antenna system, which affects the effectiveness of the test. The thermal design of the new generation of products is also more complicated. If the vacuum thermal test is still carried out in the wired load mode, it will be impossible to investigate the thermal effect of microwaves on the thermal design of the product. Therefore, it is necessary to carry out the experimental verification of the actual mode, and complete the test by directly carrying out the real microwave emission state, so as to assess the influence of microwave emission on the thermal design.

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