A kind of low frequency magnetic dielectric composite wave absorbing patch and preparation method thereof

A wave-absorbing patch and magnetic medium technology, 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: 2022-07-01
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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  • A kind of low frequency magnetic dielectric composite wave absorbing patch and preparation method thereof
  • A kind of low frequency magnetic dielectric composite wave absorbing patch and preparation method thereof
  • A kind of low frequency magnetic dielectric composite wave absorbing patch and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

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

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

[0031] (1) Mix 1.0kg of EPDM particles, 1.5kg of flake FeSiCr magnetic powder, 2.0kg of Ti 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 mixing equipment, heat it to 60℃, stir and mix for 2 hours, and obtain a uniformly mixed premix; ...

Embodiment 2

[0044] In this embodiment, the rubber is a polyolefin elastomer rubber, the filled functional additives 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 absorbing patch with a thickness of 1.5mm and an areal density of 3.2kg / m 2 .

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

[0046] (1) Mix 1.2kg of polyolefin elastomer rubber particles, 1.0kg of flake FeSiAl magnetic powder, 1.5kg of Ti 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 placed in a banbury mixer and heated to 50°C, stirred and mixed for 4 hours. Kneading uniform premix;

...

Embodiment 3

[0054] In this embodiment, the rubber is a polyurethane rubber elastomer, the filled functional additives are flame retardants, wetting and dispersing agents, vulcanizing agents and plasticizers, and the filled electromagnetic wave absorbers are flake 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-dielectric composite wave absorbing patch of the present embodiment includes the following steps:

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

[0057] Phase ceramic powder and 0.2kg of flame retardant, 0.04kg of wetting and dispersing agent, 0.02kg of vulcanizing agent, 0.01kg of plasticizer and 0.01kg of toughening agent were placed in a banbury mixer and heated to 60 °C, stirred and mixed for 3 hours t...

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Abstract

A low-frequency magnetic-dielectric composite wave-absorbing patch and a preparation method thereof. The wave-absorbing patch is composed of a magnetic-dielectric composite electromagnetic wave absorber, a functional additive and a thermoplastic rubber; wherein the magnetic-dielectric composite electromagnetic wave absorber is a magnetic sheet-like metal alloy powder The composite with dielectric MAX phase ceramic powder accounts for 40-80% of the total mass of the wave absorbing patch. The present invention also includes the preparation method of the low-frequency magnetic-dielectric composite wave absorbing patch. The low-frequency magnetic-dielectric composite wave-absorbing patch of the present invention not only has the broadband strong absorption performance in the microwave low-frequency frequency of 2GHz-9GHz, the reflection loss is better than 10dB, but also has the advantages of thin thickness, low surface density, high and low temperature resistance, and can be attached to The advantage of the target surface of any shape has a good application prospect in the field 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-dielectric 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, and the functions are diversified and the size is miniaturized. The working frequency is mostly concentrated in microwave In the L, S, and C bands of the low frequency band, the integration of more microwave signal sources in a unit space is bound to cause electromagnetic interference inside the electronic products and cause electromagnetic pollution in the surrounding living space. In order to solve the above electromagnetic interference and electromagnetic pollution problems, put forward The demand for...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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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