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Low-frequency magnetic dielectric composite wave-absorbing patch and preparation method thereof

A technology of wave-absorbing patch and magnetic medium, which is applied in the field of wave-absorbing materials, can solve the problems that the excellent characteristics are difficult to be fully utilized, and the MAX phase material lacks a magnetic loss mechanism, etc., to achieve industrial application, low cost, and high production efficiency Effect

Active Publication Date: 2021-02-26
HUNAN INSTITUTE OF ENGINEERING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, MAX phase materials lack a magnetic loss mechanism, making it difficult to fully exploit the excellent properties

Method used

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  • Low-frequency magnetic dielectric composite wave-absorbing patch and preparation method thereof
  • Low-frequency magnetic dielectric composite wave-absorbing patch and preparation method thereof
  • Low-frequency magnetic dielectric composite wave-absorbing patch and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0029] In this embodiment, the rubber is polyurethane rubber elastomer, and the functional additives filled include flame retardant, wetting and dispersing agent, vulcanizing agent, plasticizer and toughening agent, and the electromagnetic wave absorbing agent filled is flaky FeSiCr magnetic powder and Ti 3 SiC 2 MAX phase ceramic powder, low-frequency magnetic dielectric composite wave-absorbing patch with a thickness of 1.5mm and an area density of 3.2kg / m 2 .

[0030] The preparation method of the low-frequency magnetic medium composite wave-absorbing patch of this embodiment includes the following steps:

[0031] (1) Mix 1.0kg EPDM particles, 1.5kg flake FeSiCr magnetic powder, 2.0kgTi 3 SiC 2 MAX

[0032] Phase ceramic powder and 0.2kg flame retardant, 0.04kg wetting and dispersing agent, 0.03kg vulcanizing agent and 0.01kg plasticizer

[0033] Put it into the banburying equipment and heat it to 60°C, stir and mix for 2 hours to obtain a uniformly mixed premix;

[0...

Embodiment 2

[0044] In this embodiment, the rubber is polyolefin elastomer rubber, the functional additives filled include flame retardants, wetting and dispersing agents, vulcanizing agents and plasticizers, and the filled electromagnetic wave absorbers are flake FeSiAl and Ti 3 AlC 2 MAX phase ceramic powder, low-frequency magnetic dielectric composite wave-absorbing patch with a thickness of 1.5mm and an area density of 3.2kg / m 2 .

[0045] The preparation method of the low-frequency magnetic medium composite wave-absorbing patch of this embodiment includes the following steps:

[0046] (1) Mix 1.2kg polyolefin elastomer rubber particles, 1.0kg flake FeSiAl magnetic powder, 1.5kgTi 3 AlC 2

[0047] MAX phase ceramic powder, 0.4kg flame retardant, 0.03kg wetting and dispersing agent, 0.04kg vulcanizing agent, 0.01kg plasticizer and 0.01kg toughening agent were put into the banburying equipment and heated to 50°C and stirred for 4 hours to obtain Mixed homogeneous premix;

[0048] (...

Embodiment 3

[0054] In this embodiment, the rubber is polyurethane rubber elastomer, the functional additives filled include flame retardant, wetting and dispersing agent, vulcanizing agent and plasticizer, and the electromagnetic wave absorber filled is flaky FeCoZr magnetic powder and Ti 3 SiC 2 MAX phase ceramic powder, low-frequency magnetic dielectric composite wave-absorbing patch with a thickness of 1.0mm and an area density of 2.8kg / m 2 .

[0055] The preparation method of the low-frequency magnetic medium composite wave-absorbing patch of this embodiment includes the following steps:

[0056] (1) Mix 0.8kg polyurethane rubber particles, 1.2kg flake FeCoZr magnetic powder, 1.5kgTi 3 SiC 2 MAX

[0057] Phase ceramic powder, 0.2kg flame retardant, 0.04kg wetting and dispersing agent, 0.02kg vulcanizing agent, 0.01kg plasticizer and 0.01kg toughening agent were put into the banburying equipment and heated to 60°C for 3 hours, and the mixture was prepared. Homogenized premix;

[...

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Abstract

The invention discloses a low-frequency magnetic dielectric composite wave-absorbing patch and a preparation method thereof. The wave-absorbing patch consists of a magnetic dielectric composite electromagnetic wave absorbent, a functional aid and thermoplastic rubber, wherein the magnetic dielectric composite electromagnetic wave absorbent is a compound of magnetic sheet metal alloy powder and dielectric MAX phase ceramic powder, and accounts for 40-80% of the total mass of the wave absorbing patch. The invention further comprises a preparation method of the low-frequency magnetic dielectric composite wave-absorbing patch. The low-frequency magnetic dielectric composite wave-absorbing patch not only has broadband strong absorption performance with reflection loss superior to -10dB in a microwave low-frequency band of 2GHz-9GHz, but also has the advantages of being thin in thickness, low in surface density, resistant to high and low temperature and capable of being attached to the surface of a target in any shape. Good application prospects are realized in the fields of military radar stealth technology and electromagnetic compatibility of civil electronic products.

Description

technical field [0001] The invention relates to a wave-absorbing material, in particular to a low-frequency magnetic medium composite wave-absorbing patch and a preparation method thereof. Background technique [0002] With the development of wireless microwave communication technology represented by 5G communication, the number of industrial electronic equipment such as communication base stations and electronic products such as home computers and tablets is increasing day by day and is developing towards diversified functions and miniaturization, and the working frequency is mostly concentrated in microwave In the L, S, and C bands of the low frequency band, more microwave signal sources integrated in the unit space will inevitably cause electromagnetic interference inside the electronic product and cause electromagnetic pollution in the surrounding living space; in order to solve the above electromagnetic interference and electromagnetic pollution problems, the proposed T...

Claims

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Application Information

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IPC IPC(8): C09J7/25C09J7/24C08L75/04C08L23/16C08L23/02C08K9/00C08K3/34C08K3/14C08K3/01
CPCC09J7/25C09J7/241C08K9/00C08K3/34C08K3/14C08K3/01C08L2201/08C08L2201/02C08K2201/014C08L75/04C08L23/02C08L23/16
Inventor 贺君颜铄清邓永和刘胜
Owner HUNAN INSTITUTE OF ENGINEERING
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