Multilayer coated feisi al composite magnetic wave-absorbing material and preparation method thereof

CN116093633BActive Publication Date: 2026-06-19JIANGXI UNIV OF SCI & TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
JIANGXI UNIV OF SCI & TECH
Filing Date
2023-01-09
Publication Date
2026-06-19

AI Technical Summary

Technical Problem

In the in-situ composite process of existing iron-based soft magnetic wave absorbing materials, the preparation process of MOFs materials will cause erosion of the iron-based alloy matrix, affecting the preparation and performance of the materials.

Method used

A multi-layered FeSiAl composite magnetic absorbing material is used, with the core being a sheet-like FeSiAl magnetic absorbing powder with an oxidized surface and the outer layer being a MOF derivative C/Fe3O4/α-Fe. The core-shell structure is prepared by hydrothermal method and vacuum heat treatment, which avoids the corrosion of the iron-based alloy matrix by the MOF material.

Benefits of technology

It improves the material's wave absorption performance and stability, optimizes impedance matching, and enhances the material's corrosion resistance, making it suitable for practical applications and industrial production.

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Abstract

This invention discloses a multilayer coated FeSiAl composite magnetic absorbing material and its preparation method. The FeSiAl composite magnetic absorbing material is composed of a core of surface-oxidized sheet-like FeSiAl magnetic absorbing powder and a coating layer of MOF derivatives. The MOF derivatives have a unit molecular formula of C2. 24 H 12 ClFe3O 13 The iron-based framework material MIL-101 (Fe) is prepared by the following steps: S1, ball milling micron-sized water-atomized FeSiAl magnetic powder to obtain flake-like FeSiAl magnetic powder; S2, oxidizing and heat-treating the flake-like FeSiAl magnetic powder to obtain surface-oxidized flake-like FeSiAl magnetic absorbing powder; S3, subjecting the flake-like FeSiAl magnetic absorbing powder to a hydrothermal reaction to obtain flake-like FeSiAl composite MOFs magnetic powder; S4, vacuum heat-treating the flake-like FeSiAl composite MOFs magnetic powder to obtain a C / Fe3O4 / α-Fe multilayer coated FeSiAl composite magnetic absorbing material.
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