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Preparation method of electromagnetic wave absorption material based on ferrite solid wastes

A technology of absorbing material and ferrite, applied in the direction of magnetic material, inorganic material magnetism, unspecified rubber coating, etc., can solve the problems of insufficient dielectric loss, unbalanced electromagnetic impedance, uneven size, etc., to reduce the density and mechanical properties. The effect of stable performance and reinforcement, low cost of raw materials

Active Publication Date: 2018-06-01
HEFEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, problems such as excessive grain size, uneven size, complex impurities, and composition segregation in the solid waste of soft ferrite materials are still problems to be solved urgently. Problems such as electromagnetic impedance imbalance and insufficient dielectric loss of a single material are also affecting key to performance
At present, there is no report on the production of microwave absorbing materials using solid ferrite waste.

Method used

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  • Preparation method of electromagnetic wave absorption material based on ferrite solid wastes
  • Preparation method of electromagnetic wave absorption material based on ferrite solid wastes
  • Preparation method of electromagnetic wave absorption material based on ferrite solid wastes

Examples

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Effect test

Embodiment 1

[0035] In this example, the manganese-zinc-ferrite industrial solid waste recovered from the soft magnetic core production line is used as the precursor, and it is prepared by purification, ball milling, hydrothermal carbon coating and other steps with a mass ratio of solid waste to glucose of 1:1. The ferrite / carbon composite electromagnetic wave absorbing material specifically includes the following steps:

[0036] 1. Purification of solid waste

[0037] Put 3g of untreated manganese-zinc ferrite agglomerated grinding solid waste recovered from the magnetic core production line in a mortar, and fully grind until it becomes powder; disperse the manganese-zinc ferrite solid waste powder in 30ml In deionized water, stir mechanically to make it evenly mixed to form a suspension; the suspension is ultrasonically treated for 20 minutes, so that the ferrite particles and impurities in the solid waste powder are evenly dispersed in the water; a 0.2T permanent magnet is used to separ...

Embodiment 2

[0045] In this example, the manganese-zinc-ferrite industrial solid waste recovered from the soft magnetic core production line is used as the precursor, and it is prepared by purification, ball milling, hydrothermal carbon coating and other steps with a mass ratio of solid waste to glucose of 1:3. The ferrite / carbon composite electromagnetic wave absorbing material specifically includes the following steps:

[0046] 1. Purification of solid waste

[0047] Put 3g of untreated manganese-zinc ferrite agglomerated grinding solid waste recovered from the magnetic core production line in a mortar, and fully grind until it becomes powder; disperse the manganese-zinc ferrite solid waste powder in 30ml In deionized water, stir mechanically to make it evenly mixed to form a suspension; the suspension is ultrasonically treated for 20 minutes, so that the ferrite particles and impurities in the solid waste powder are evenly dispersed in the water; a 0.2T permanent magnet is used to separ...

Embodiment 3

[0055] In this example, the manganese-zinc-ferrite industrial solid waste recovered from the soft magnetic core production line is used as the precursor, and it is prepared by purification, ball milling, hydrothermal carbon coating and other steps with a mass ratio of solid waste to glucose of 1:5. The ferrite / carbon composite electromagnetic wave absorbing material specifically includes the following steps:

[0056] 1. Purification of solid waste

[0057] Put 3g of untreated manganese-zinc ferrite agglomerated grinding solid waste recovered from the magnetic core production line in a mortar, and fully grind until it becomes powder; disperse the manganese-zinc ferrite solid waste powder in 30ml In deionized water, stir mechanically to make it evenly mixed to form a suspension; the suspension is ultrasonically treated for 20 minutes, so that the ferrite particles and impurities in the solid waste powder are evenly dispersed in the water; a 0.2T permanent magnet is used to separ...

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Abstract

The invention discloses a preparation method of an electromagnetic wave absorption material based on ferrite solid wastes. The electromagnetic wave absorption material with a composite structure is obtained by taking the ferrite solid wastes produced by grinding in a soft magnet magnetic core production link as a magnetic base body and covering carbon on a crystal boundary. A ferrite / carbon composite electromagnetic wave absorption material prepared by the preparation method has anti-oxidization and anti-corrosion capabilities; an interface carbon material is added so that the density of a wave absorption body can be reduced and light and thin wave absorption products are easy to produce; the mechanical properties also can be stabilized and reinforced. The electromagnetic wave absorption material prepared by the preparation method disclosed by the invention has wide applicability, is suitable for being used for absorbing electromagnetic waves with the frequency band of DC-42.5GHz and can be used for products including blocks, patches, pyramids, conoids, coatings, thin films and the like.

Description

technical field [0001] The invention relates to a method for preparing an electromagnetic wave absorbing material, in particular to a method for preparing an electromagnetic wave absorbing material based on ferrite solid waste, and belongs to the technical field of wave absorbing functional materials. Background technique [0002] The integration of electromagnetic wave absorbing materials in electronic devices is the main way to solve the serious electromagnetic radiation and electromagnetic interference of equipment, and plays an important role in the purification of the electromagnetic environment and the protection of human health. The application of electromagnetic wave absorbing materials in electromagnetic countermeasures and radar stealth in the military field also occupies a major position. Therefore, with the rapid popularization of new products such as electronic information, mobile communication, wireless interconnection, smart home, and new energy vehicles in th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L91/06C08L101/00C08L21/00C08K9/10C08K9/00C08K3/22C09D201/00C09D191/06C09D121/00C09D5/08C09D7/62H05K9/00H01F1/34H01F41/00
CPCC08K3/22C08K9/00C08K9/10C08K2003/2275C08K2201/01C09D5/08C09D121/00C09D191/06C09D201/00H01F1/344H01F41/00H05K9/0081C08L101/00C08L91/06
Inventor 汪嘉恒杨标李映欣蔡婧王雅萍张勇吴玉程
Owner HEFEI UNIV OF TECH
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