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Preparation method of resin-reinforced ferrite solid waste-based broadband electromagnetic wave absorber

An electromagnetic wave and ferrite technology, applied in the field of electromagnetic functional materials, can solve problems such as unstable performance, difficulty in reaching mainstream magnetic core products, poor mechanical properties, etc., and achieve balanced performance differences, high economic benefits and environmental protection, and good electromagnetic waves The effect of absorbing properties

Active Publication Date: 2019-11-22
HEFEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above methods have factors such as differences in grain size, impurities, composition segregation, and the resulting problems of poor mechanical properties and unstable performance. It is difficult to meet the requirements of mainstream magnetic core products, but these factors do not affect or even benefit solid waste in the field. Performance in terms of electromagnetic wave absorption

Method used

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  • Preparation method of resin-reinforced ferrite solid waste-based broadband electromagnetic wave absorber
  • Preparation method of resin-reinforced ferrite solid waste-based broadband electromagnetic wave absorber
  • Preparation method of resin-reinforced ferrite solid waste-based broadband electromagnetic wave absorber

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] In this example, boron phenolic resin is combined with manganese-zinc ferrite solid waste, and by purifying and modifying ferrite solid waste, and compounding with resin, a broadband electromagnetic wave with excellent mechanical properties and wave-absorbing properties is prepared. absorber. Concrete preparation method comprises the following steps:

[0038] 1. Purification of soft ferrite solid waste

[0039] 1a. Take the solid waste of soft magnetic ferrite and mix it fully with water, stir and disperse it, and then sieve it to filter out some larger metal debris, corundum and other impurity particles, and then apply a magnetic field to the resulting mixed liquid to convert the magnetic soft magnet Oxygen particles are separated from the aqueous solution of non-magnetic impurities;

[0040] 1b. Repeat step 1a 5 times for the separated soft ferrite, then dry and grind to obtain purified soft ferrite powder;

[0041] 2. Homogenization of soft ferrite particles

[004...

Embodiment 2

[0050] In this example, water-based polyurethane is combined with manganese-zinc ferrite solid waste, and by purifying and modifying ferrite solid waste, and compounding it with resin, a wide-band electromagnetic wave absorber with excellent mechanical properties and wave-absorbing properties is prepared. body. Concrete preparation method comprises the following steps:

[0051] 1. Purification of soft ferrite solid waste

[0052] 1a. Take the solid waste of soft magnetic ferrite and mix it fully with water, stir and disperse it, and then sieve it to filter out some larger metal debris, corundum and other impurity particles, and then apply a magnetic field to the resulting mixed liquid to convert the magnetic soft magnet Oxygen particles are separated from the aqueous solution of non-magnetic impurities;

[0053] 1b. Repeat step 1a 5 times for the separated soft ferrite, then dry and grind to obtain purified soft ferrite powder;

[0054] 2. Homogenization of soft ferrite par...

Embodiment 3

[0063] In this example, organic silicon resin is combined with manganese zinc ferrite solid waste, and by purifying and modifying ferrite solid waste, and compounding with resin, a broadband electromagnetic wave with excellent mechanical properties and wave-absorbing properties is prepared. absorber. Concrete preparation method comprises the following steps:

[0064] 1. Purification of soft ferrite solid waste

[0065] 1a. Take the solid waste of soft magnetic ferrite and mix it fully with water, stir and disperse it, and then sieve it to filter out some larger metal debris, corundum and other impurity particles, and then apply a magnetic field to the resulting mixed liquid to convert the magnetic soft magnet Oxygen particles are separated from the aqueous solution of non-magnetic impurities;

[0066] 1b. Repeat step 1a 5 times for the separated soft ferrite, then dry and grind to obtain purified soft ferrite powder;

[0067] 2. Homogenization of soft ferrite particles

[...

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Abstract

The invention discloses a preparation method of a resin-reinforced ferrite solid waste-based broadband electromagnetic wave absorber. Firstly, soft magnetic ferrite solid waste is purified through thesteps of washing, dispersing, filtering, magnetic separation and the like, then purified ferrite solid waste crystal grains are modified, and then the modified ferrite solid waste crystal grains arecompounded with resin to prepare the electromagnetic wave absorber with excellent mechanical property and wave absorbing property. According to the invention, solid waste is recycled; the resin is compounded and reinforced on the ferrite solid waste grain boundary, and the interface dipole is introduced to enhance the dielectric loss, thereby balancing the performance difference caused by solid wastes, improving the interface impedance matching and broadband electromagnetic wave absorption performance, and enhancing the mechanical properties and thermodynamic stability of the electromagnetic wave absorber.

Description

technical field [0001] The invention relates to a preparation method of a broadband electromagnetic wave absorber, in particular to a preparation method of a resin-reinforced ferrite solid waste-based broadband electromagnetic wave absorber, which belongs to the technical field of electromagnetic functional materials. Background technique [0002] Electromagnetic shielding and electromagnetic absorption play an important role in both civilian and military fields. Under the background of "Industry 4.0", the rapid development of electronic information technology and the explosive growth of intelligent IoT products are rapidly changing the daily life of human beings, but they have also brought serious electromagnetic radiation and electromagnetic interference (EMI) problems. Military radar countermeasures and electromagnetic stealth technologies in a complex international environment have gradually become one of the core technologies for improving national security and internat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05K9/00C08L61/14C08L75/04C08L83/04C08K9/06C08K3/22
CPCC08K3/22C08K9/06C08K2003/2265C08K2201/01H05K9/0081C08L61/14C08L75/04C08L83/04
Inventor 汪嘉恒吴运飞张勇吴玉程
Owner HEFEI UNIV OF TECH
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