CN-117645838-B - Preparation method of ultra-wideband radar stealth material coating

Abstract

The invention relates to a preparation method of an ultra-wideband radar stealth material coating, which is based on the principle that a three-dimensional ordered nano-structure material diffusely reflects radar waves, adopts thorny spherical nano nickel powder formed by needle-shaped nano nickel, strengthens the microstructure by SiO 2 sol to be used as a primary particle structure, combines the nano nickel powder into thorny spherical nano nickel powder aggregates to form a secondary ordered structure due to easy aggregation of nano particles, and uniformly mixes the nano nickel powder with an organic silica gel adhesive to prepare the stealth material coating, so that the thorny spherical nano nickel powder is uniformly distributed in the stealth material coating with the thickness of about 2mm to form a three-dimensional ordered structure, and is equivalent to a macroscopic plane structure which is statistically totally and omnidirectionally reflected by countless tiny reflective particles in different directions, and diffusely scatters radar microwaves to attenuate radar echo signal intensity, thereby realizing ultra-wideband radar microwave stealth.

Inventors

• WANG JIAJUN
• WANG ZHENGTIAN
• WANG LICHENG

Assignees

• 宁海东方鸿业新材料有限公司

Dates

Publication Date

20260505

Application Date

20231208

Priority Date

20230421

Claims (3)

1. 1. The preparation method of the ultra-wideband radar stealth material coating is characterized in that the ultra-wideband radar stealth material coating is prepared by uniformly mixing thorn-shaped nano nickel powder with a microstructure reinforced by SiO 2 sol and base adhesive, brushing and drying the mixture to prepare a coating with the thickness of 1.8-2.2 mm, wherein the mass ratio of the thorn-shaped nano nickel powder with the microstructure reinforced by SiO 2 sol to the base adhesive is 30-60:70-40; wherein the spinned spherical nano nickel powder comprises the weight of SiO 2 sol particles with reinforced microstructure, The base adhesive is an organic silica gel adhesive.
2. 2. The method for preparing the ultra-wideband radar stealth material coating according to claim 1, wherein the SiO 2 sol reinforced spindly sphere nano nickel powder is prepared by adopting 1-3wt% of SiO 2 sol and spindly sphere nano nickel powder to mix with stirring at a slow speed, standing for 6-12 hours, filtering, and vacuum drying at 100-110 ℃.
3. 3. The method for preparing the ultra-wideband radar stealth material coating according to claim 1 or 2, wherein in the preparation process of the spinned spherical nano nickel powder reinforced by the SiO 2 sol, the spinned spherical nano nickel powder accounts for 85-95wt% of the total solid content of the spinned spherical nano nickel powder and SiO 2 of the SiO 2 sol.

Description

Preparation method of ultra-wideband radar stealth material coating Technical Field The invention relates to a preparation method of an ultra-wideband radar stealth material coating, belonging to the technical field of functional materials. Technical Field Stealth of radar of an invisible aircraft, a battle ship and a cruise missile is a technology which reduces the RCS value of the radar echo intensity of a target through weakening, restraining, absorbing and deflecting, and is difficult to be identified and found by an enemy radar in a certain range. The method can be divided into an electromagnetic cancellation technology, a special shaping technology of the appearance of a target, a stealth composite material technology and a plasma stealth technology. The electromagnetic cancellation technology has long-term theoretical research in foreign countries, but is hardly practical in the current report of practical application, the rapid development of the current radar detection technology is basically of no practical value, the special shaping technology of the target appearance cannot be shaped before a multi-base radar and has great influence on aerodynamics of an airplane, the plasma technology needs to consume a large amount of electric energy, cannot be comprehensively implemented on the airplane, warship and cruise missile, and can be only used for local stealth at most, and the current stealth airplane mainly adopts wave-absorbing materials. The conventional wave-absorbing coating of the wave-absorbing material is mainly prepared by adding high-temperature-resistant metal-based magnetic micro particles, adding some rare earth components or conductive oxides to improve the effect, generating magnetic loss and electric loss by absorbing radar waves, weakening the vertical radar echo intensity of a target to realize radar stealth, and because both the magnetic loss and the electric loss have quantum energy level characteristics, an absorption peak appears in a specific microwave frequency band, and if the absorption peak jumps out of a corresponding 'quantum energy level' frequency band, the absorption is very weak, so that the conventional stealth aircraft does not have stealth effects in a frequency hopping radar or C-band, S-band, L-band and very high frequency band. The wide frequency band of the wave-absorbing material is expanded in various countries, the wide frequency and ultra-wide frequency stealth are expected to be realized, and the wide frequency absorption is difficult to occur based on the characteristics of the quantum energy level of the magnetic loss and the electric loss material, the main wave-absorbing frequency band is in the X wave band, and the wave-absorbing frequency band is at most 6.5-7.5 GHz. The prior radar microwave stealth coating in China is similar to the coating of stealth fighters of F35 and F22 in the United states, mainly comprises composite powder of magnetic loss materials such as ferrite, carbon-based iron powder and electric loss materials such as conductive oxides, has reduced stealth performance due to oxidation of wave absorbing materials, needs frequent maintenance and coating, and has no subversion or breakthrough progress. The wave absorbing material formed by the electric loss material and the magnetic loss material has the characteristic of quantum energy level, so that the expansion of wave absorbing frequency width is limited, the ultra-wideband stealth can be realized only by breaking through the stealth mechanism of the wave absorbing material, and the ultra-wideband radar stealth is realized. Disclosure of Invention The invention aims to provide a preparation method of an ultra-wideband radar stealth material coating, which is based on the principle that three-dimensional ordered nano-structure materials diffusely reflect radar waves, uses thorny spherical nano-nickel powder formed by needle-shaped nano-nickel as a primary particle structure and uses SiO 2 sol to strengthen the microstructure of the nano-nickel powder, combines the nano-nickel powder into thorny spherical nano-nickel powder aggregates to form a secondary ordered structure due to easy agglomeration of nano-particles, is uniformly mixed with an organic silica gel adhesive to prepare the stealth material coating, enables the thorny spherical nano-nickel powder to be uniformly distributed in the stealth material coating with the thickness of about 2mm to form a three-dimensional ordered structure, is equivalent to innumerable tiny reflective particles in different directions to form a macroscopic plane structure with statistically omnibearing reflection, diffusely scatters radar waves to attenuate radar echo signal intensity, and achieves ultra-wideband radar microwave stealth. In order to achieve the above object, the present invention specifically adopts the following steps: 1. The ultra-wideband radar stealth material coating is prepared by mixing, brushing and drying thorny spherica