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The stealth principle of cooling stealth materials

Author:admin   AddTime:2021-09-26

Traditional radar wave absorbing materials are generally iron compounds, and the thickness is required to be a certain multiple of the wavelength of the radar wave, so as to use the interference of the radar wave to eliminate or reduce the energy of the radar wave, or to use high resistance and magnetoresistive materials. The wave energy of the radar wave is converted into heat to reduce the reflection of the radar wave. However, these materials have small absorption bands, high density, structural evacuation, complex maintenance, and high cost of use, which limit their wide use. The working principle and physical properties of the new ceramic compound radar wave absorbing materials are quite different from those of the previous stealth materials. They can overcome the defects of the previous radar wave absorbing materials and bring the development of stealth materials into a new world.



The working principle of the ceramic compound radar wave absorbing material is: in the highly weathered ceramic material, the particle diameter of the compound is extremely small. After encountering electromagnetic waves, it vibrates and shifts, and converts the energy of the radar wave into kinetic energy and heat energy to achieve absorption and The purpose of reducing the energy of radar waves.
According to the working principle of the ceramic compound stealth material, it is not difficult to find its advantages compared with the traditional stealth material: First, there is no problem of the thickness of the material. The second is that there is no problem with the weight of the material. The density of the stealth coating made of powdered ceramic compound is much lower than that of the traditional iron compound stealth coating. The third material is low in cost. The ceramic compound stealth material mainly uses ceramic materials and very fine coal ash remaining after combustion, and the price is quite cheap. Fourth, it is easy to maintain. The main components of the ceramic compound stealth material have been processed by high weathering and erosion, and the ability to adapt to the outside world is extremely strong. Fifth, and the most important point, the ceramic compound stealth material covers a very wide range. It is said that the finished product of a ceramic compound radar wave absorbing material developed by the U.S. military can cover the A to 1 band, which can attenuate the radar wave by 60dB, and the metal elements added to the ceramic compound stealth material are different, and the band covered by the made stealth material is also Different, it can even cover the infrared band. For infrared, this material is like a magic mirror, which can reflect the infrared of the surrounding environment. For example, a tank coated with this material in the dark night sees not the image of the tank but the infrared of the surrounding environment in the infrared night vision equipment. image. One and

This kind of paint is used on the clothes and camouflage nets of military personnel, and infrared night vision equipment will also be invalid for night observation of personnel.
Recently, the research and development of ceramic compound stealth materials has attracted the attention of more and more countries and the military, but there are still many problems to be studied and solved in the development of this material. For example, the ceramic compound after adding different materials corresponds to different electromagnetic wave bands Relevance research, whether it is harmful to human body and so on.

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