A composite material with electromagnetic wave absorption and corrosion resistance for ships and a preparation method thereof

By constructing a multiphase synergistic structure of ZnO, Fe3C, and Fe3ZnC0.5 for shipbuilding composite materials, the problems of narrow bandwidth and insufficient corrosion resistance of electromagnetic wave absorbing materials in marine environments have been solved, achieving a synergistic improvement in broadband absorption and corrosion resistance.

CN122395925APending Publication Date: 2026-07-14HARBIN INST OF TECH AT WEIHAI +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
HARBIN INST OF TECH AT WEIHAI
Filing Date
2026-05-07
Publication Date
2026-07-14

AI Technical Summary

Technical Problem

Existing electromagnetic wave absorbing materials have narrow absorption bandwidth, poor impedance matching, and insufficient corrosion resistance in marine environments, making it difficult to achieve a synergistic improvement in electromagnetic wave absorption and corrosion resistance.

Method used

Metal-organic framework precursors were constructed using zinc acetate dihydrate, dimethylimidazole, and iron acetylacetone as raw materials. After aging, separation, and freeze-drying, the precursors were subjected to medium-temperature heat treatment under an inert atmosphere to form a multiphase synergistic structure of ZnO, Fe3C, and Fe3ZnC0.5. A biomimetic network structure combining carbon spheroids and carbon nanotube dendrites was also constructed.

Benefits of technology

This study achieved a synergistic enhancement of broadband electromagnetic wave absorption performance and seawater corrosion resistance, thereby improving the long-term stability of the material in complex environments.

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Abstract

The application relates to a ship composite material with electromagnetic wave absorption and corrosion resistance and a preparation method thereof, and belongs to the technical field of metal organic framework derived multifunctional composite materials. Zinc acetate dihydrate, dimethyl imidazole and iron acetylacetone are used as raw materials, a metal organic framework precursor is constructed through solution aging, centrifugal washing and freeze-drying treatment are carried out, and then medium-temperature heat treatment is carried out under an inert atmosphere, so that a composite material containing ZnO, Fe3C, Fe3ZnC0.5 and a carbon phase is obtained. By adjusting the doping amount of Fe elements and the heat treatment conditions, the phase composition and the microstructure of the material can be controlled and adjusted, and a biomimetic network structure composed of carbon spherical cell bodies and carbon nanotube dendrites is formed in the carbon-based skeleton. The structure can enhance the interface polarization loss and the conductive loss, improve the impedance matching capability, and the ZnO phase and the carbon shell structure can effectively block the corrosion medium and improve the seawater corrosion resistance of the material.
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