Ceramic glass system wrapped carbonaceous composite wave-absorbing material and preparation method thereof

By preparing the core-shell structure of the ceramic glass system that encapsulates carbonaceous composite wave absorbing material, the problems of oxidation and magnetic loss of existing materials at high temperatures are solved, and effective electromagnetic wave absorption and stealth effects are achieved in high temperature environments.

CN120329004APending Publication Date: 2025-07-18HARBIN INST OF TECH AT WEIHAI +1
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Patent Information

Application Number
CN202510341408.3
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-03-21
Publication Date
2025-07-18

AI Technical Summary

Technical Problem

Existing electromagnetic wave absorbing materials are prone to oxidation or loss of magnetism in high temperature environments, resulting in a degradation of wave absorption performance and cannot meet the stealth needs of high-speed aircraft.

Method used

The preparation method of wrapping carbonaceous composite absorbing material with ceramic glass system is used to prepare the core layer and shell layer, and a mixture of graphene, carbon nanotubes, sodium silicate solution and aluminum dihydrogen phosphate solution is added, kaolin is used to carry out shearing and crushing and protective atmosphere heat treatment to form a composite material with a core-shell structure.

Benefits of technology

Maintain good oxidation resistance and wave absorption performance at high temperatures, achieve complementary high temperature resistance and wave absorption performance of the material, improve the thermal stability and corrosion resistance of the material, and are suitable for high-temperature environments.

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Abstract

The invention discloses a ceramic glass system wrapped carbonaceous composite wave-absorbing material and a preparation method thereof, and belongs to the field of electromagnetic wave absorbing materials, the preparation method comprises the following steps: preparing a core layer, preparing a shell layer, and carrying out heat treatment in a protective atmosphere; the preparation of the core layer comprises the following steps: mixing graphene and carbon nanotubes, uniformly stirring, placing in a crusher, adding a mixed solution of a sodium silicate solution and an aluminum dihydrogen phosphate solution while stirring and crushing, and stirring and crushing to obtain large blocky particles; in the step of preparing the shell layer, large blocky particles are subjected to first-time shearing and smashing, then a mixed solution of kaolin, a sodium silicate solution and an aluminum dihydrogen phosphate solution is added for dispersion, second-time shearing and smashing are conducted, drying is conducted, and a ceramic glass-carbon material is obtained; the ceramic glass system coated carbonaceous composite wave-absorbing material prepared by the invention has excellent oxidation resistance, and still has excellent wave-absorbing performance and long service life in a high-temperature environment.
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