Core-shell structure wave-absorbing material, thickness optimization design method and application thereof

By preparing a silica shell using the sol-gel method and optimizing its thickness using a decoupling-testing-verification iterative approach, the corrosion resistance and electromagnetic wave absorption performance of sheet-like carbonyl iron powder were solved. This achieved efficient thickness optimization design and improved the material's corrosion resistance and wave absorption performance.

CN122246498APending Publication Date: 2026-06-19HEFEI ZHONGYIN NEW MATERIAL CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
HEFEI ZHONGYIN NEW MATERIAL CO LTD
Filing Date
2026-03-20
Publication Date
2026-06-19

AI Technical Summary

Technical Problem

In existing technologies, flake carbonyl iron powder has poor resistance to environmental corrosion, and its high complex permittivity leads to impedance mismatch, affecting electromagnetic wave absorption performance. Thickness optimization lacks theoretical guidance, resulting in long research and development cycles and high costs.

Method used

A silica shell was prepared by sol-gel method, and the intrinsic material electromagnetic parameters were obtained by combining the decoupling-testing-verification iterative method. The thickness of the silica shell in the core-shell structure was optimized to achieve a synergistic improvement in corrosion resistance and electromagnetic wave absorption performance.

Benefits of technology

It significantly shortened the research and development cycle, reduced costs, and achieved efficient synergistic optimization of core-shell structure microwave absorbing materials, improving the material's resistance to environmental corrosion and electromagnetic wave absorption efficiency.

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Abstract

This application provides a core-shell structure microwave absorbing material and its thickness optimization design method and application, relating to the field of electromagnetic wave absorbing materials technology. The core-shell structure microwave absorbing material comprises a sheet-like magnetic metal core and a silica shell covering the core, the silica shell being prepared via a sol-gel method. The optimization design method includes: obtaining the intrinsic electromagnetic parameters of the constituent materials; constructing a single-particle simulation model with shell thickness as the variable; calibrating the simulation parameters through a decoupling-testing-verification iterative process; optimizing the solution for the optimal thickness based on the calibration model with the goal of maximizing the effective absorption bandwidth of reflection loss; and finally determining the optimal thickness range through experimental verification. This application achieves synergistic optimization of microwave absorption performance and corrosion resistance, solving the problems of long development cycles and high costs associated with traditional trial-and-error methods. The designed core-shell structure microwave absorbing material can be widely used in fields such as electronic equipment shielding, stealth technology, and microwave anechoic chambers.
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