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One-dimensional iron-based wave-absorbing material derived from a metal organic framework, and preparation method thereof

A metal-organic framework and wave-absorbing material technology, which is applied in the direction of ferrous oxide, ferrous oxide, iron oxide/ferric hydroxide, etc., can solve the change of magnetic anisotropy and affect the complex permeability of wave-absorbing materials Spectrum and other issues, to achieve the effect of low production cost, excellent low-matching thickness broadband absorbing performance, and high yield

Active Publication Date: 2021-11-09
HEFEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Interestingly, the one-dimensional structure can also cause a change in the magnetic anisotropy, thereby affecting the complex permeability spectrum of the absorbing material

Method used

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  • One-dimensional iron-based wave-absorbing material derived from a metal organic framework, and preparation method thereof
  • One-dimensional iron-based wave-absorbing material derived from a metal organic framework, and preparation method thereof
  • One-dimensional iron-based wave-absorbing material derived from a metal organic framework, and preparation method thereof

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Effect test

Embodiment 1

[0024] The specific preparation steps of a metal-organic framework-derived one-dimensional iron-based microwave-absorbing material are as follows:

[0025] (1) Dissolve 1.08 g of ferric chloride hexahydrate in 54 mL of N,N-dimethylformamide solution, stir for 10 min, then add 0.88 g of terephthalic acid, and stir for 30 min to obtain an iron salt solution; Dissolve another 0.096 g of sodium hydroxide in 6 mL of deionized water, pour the sodium hydroxide solution into the iron salt solution, and conduct a solvothermal reaction at 100 °C for 24 h; after the reaction, centrifuge the product, and use N, N - washing with dimethylformamide twice, drying in a vacuum drying oven at a temperature of 80° C. for 1 hour; grinding to obtain a metal organic framework powder; the metal organic framework powder is light yellow, with iron as the central metal element, Using terephthalic acid as the organic ligand, denoted as Fe-bdc, the metal organic framework powder particles are in the shape...

Embodiment 2

[0035] The specific preparation steps of a metal-organic framework-derived one-dimensional iron-based microwave-absorbing material are as follows:

[0036] (1) Dissolve 1.08 g of ferric chloride hexahydrate in 54 mL of N,N-dimethylformamide solution, stir for 10 min, then add 0.88 g of terephthalic acid, and stir for 30 min to obtain an iron salt solution; Another 0.096 g of sodium hydroxide was dissolved in 6 mL of deionized water, the sodium hydroxide solution was added to the iron salt solution, and the solvothermal reaction was carried out at 100 °C for 24 h; Dimethylformamide was washed twice; dried in a vacuum drying oven at a temperature of 80° C. for 1 hour; ground to obtain a metal organic framework powder; the metal organic framework powder was light yellow, with iron as the central metal element, and Terephthalic acid is an organic ligand, which is denoted as Fe-bdc. The metal-organic framework powder particles are in the shape of one-dimensional rods with a rod len...

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Abstract

The invention discloses a one-dimensional iron-based wave-absorbing material derived from a metal organic framework, and a preparation method thereof, and belongs to the technical field of microwave absorbing materials. A one-dimensional metal organic framework (Fe-bdc) is used as a precursor, and a process of air oxidation and hydrogen reduction is adopted, so that the content and morphology of magnetic components in the derived one-dimensional iron-based wave-absorbing material are regulated and controlled, optimization of electromagnetic parameters is promoted, and effective absorption of broadband electromagnetic waves is realized under the condition of low thickness. From the aspect of components, non-magnetic components are effectively removed in the oxidation process, and the content of each magnetic component can be effectively adjusted in the reduction process. From the aspect of the structure, the one-dimensional bead-shaped structure has relatively strong shape anisotropy, can promote the formation of a magnetic conductive path and a conductive path, and is beneficial to enhancing the electromagnetic attenuation capability. The effective absorption frequency band of the one-dimensional iron-based wave-absorbing material can reach 3.52 GHz under the condition that the thickness is only 1.2 mm, and the one-dimensional iron-based wave-absorbing material shows excellent low-thickness and broadband wave-absorbing characteristics. The method does not need complex equipment, the cost is low, and the product consistency is high.

Description

technical field [0001] The invention belongs to the technical field of microwave absorbing materials, and in particular relates to a one-dimensional iron-based microwave absorbing material derived from a metal organic framework and a preparation method thereof. Background technique [0002] The rapid development of 5G communication technology has greatly facilitated human life, but at the same time it has also brought about increasingly serious electromagnetic pollution problems, and it is urgent to develop high-efficiency microwave absorbing materials. With the acceleration of the construction of small 5G base stations and the upgrading of a large number of microelectronic devices, wide effective absorption frequency band and low thickness have gradually become the core goals of the research and development of absorbing materials. According to the electromagnetic theory, the reduction of the thickness of the absorbing material can be achieved by increasing the complex permi...

Claims

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Application Information

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IPC IPC(8): C01G49/08C01G49/04B22F1/00B22F9/22H05K9/00B82Y40/00
CPCC01G49/08C01G49/04B22F9/22H05K9/0081B82Y40/00C01P2004/10C01P2004/03C01P2002/72C01P2004/80
Inventor 刘伟段鹏韬张学斌苏海林
Owner HEFEI UNIV OF TECH
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