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Preparation method of low-cost environment-friendly microwave absorber

A microwave absorption and low-cost technology, applied in antennas, electrical components, etc., to achieve high resource utilization, low cost, and high resource utilization

Active Publication Date: 2020-11-27
HEFEI UNIV OF TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at a series of bottleneck problems existing in the current ferrite product solid waste recovery technology for different applications, the present invention proposes a low-cost and environmentally friendly microwave absorber preparation method based on the grain boundary diffusion scheme

Method used

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  • Preparation method of low-cost environment-friendly microwave absorber
  • Preparation method of low-cost environment-friendly microwave absorber
  • Preparation method of low-cost environment-friendly microwave absorber

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] This example uses the crushed materials from grinding solid waste, waste green body, and waste products generated during the production process of electromagnetic wave absorption, soft magnetic core materials, and devices as raw materials. They are dispersed through washing, drying and sieving, and ball milling once. Secondary ball milling, pressing molding, high-temperature sintering and other processes to obtain a high-density microwave absorber. The mass ratio of the two solid wastes is 1:9. The specific steps are as follows:

[0031] Step 1: Take the crushed MnZn ferrite magnetic core solid waste powder, and after washing, purifying, drying, sieving and other processes, a powder 1 with a particle size of about 1-75 μm is obtained.

[0032] Step 2: Take the broken manganese-zinc-ferrite wave-absorbing solid waste powder, after washing, purifying, drying and other processes, add it to the ball mill tank according to the ratio of powder: water: ball milling beads mass r...

Embodiment 2

[0037] This example uses grinding solid waste, waste green body, and waste products generated during the production process of electromagnetic wave absorption, soft magnetic core materials, and devices as raw materials, and is washed and dispersed, dried and sieved, and ball milled once. Secondary ball milling, pressing molding, high-temperature sintering and other processes to obtain a high-density microwave absorber. The mass ratio of the two solid wastes is 1:2.33. The specific steps are as follows:

[0038] Step 1: Take the crushed MnZn ferrite magnetic core solid waste powder, and after washing, purifying, drying, sieving and other processes, a powder 1 with a particle size of about 1-75 μm is obtained.

[0039] Step 2: Take the crushed manganese-zinc-ferrite wave-absorbing solid waste powder, after washing, purifying, drying and other processes, add it to the ball milling tank according to the mass ratio of powder: water: ball milling beads: 1:1.2:6 In the process, wet b...

Embodiment 3

[0044] This example uses grinding solid waste, waste green body, and waste products generated during the production process of electromagnetic wave absorption, soft magnetic core materials, and devices as raw materials, and is washed and dispersed, dried and sieved, and ball milled once. Secondary ball milling, pressing molding, high-temperature sintering and other processes to obtain a high-density microwave absorber. The mass ratio of the two solid wastes is 1:2.33. The specific steps are as follows:

[0045] Step 1: Take the crushed MnZn ferrite magnetic core solid waste powder, and after washing, purifying, drying, sieving and other processes, a powder 1 with a particle size of about 1-75 μm is obtained.

[0046] Step 2: Take the crushed manganese zinc ferrite wave-absorbing solid waste powder, after washing, purifying, drying and other processes, add it to the ball mill tank according to the mass ratio of powder: water: ball milling beads: 1:1.5:8 In the process, wet ball...

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Abstract

The invention discloses a preparation method of a low-cost environment-friendly microwave absorber. The differentiation characteristics of two types of solid waste formula elements such as a manganese-zinc ferrite magnetic core and wave absorption are combined; the structure that the grain boundary of the manganese-rich magnetic core material is filled with the zinc-rich wave-absorbing material isdesigned, high-energy mechanical alloying is combined with segmented heat treatment, diffusion doping is conducted on a low-loss magnetic core solid waste grain interface, and the electromagnetic loss and the wave-absorbing performance of the absorber are enhanced. Meanwhile, according to the design, growth and diffusion of the fine-grain wave-absorbing material on the large-grain interface of the magnetic core material are utilized, the common problem of air gaps of the solid waste-based microwave absorber is effectively solved, the effective microwave absorption performance of the solid waste-based microwave absorber is improved, and meanwhile the mechanical property of the absorber is also enhanced. Ferrite solid waste is completely used as a raw material, the preparation cost is extremely low, and the method is suitable for practical and environment-friendly microwave absorption products.

Description

technical field [0001] The invention relates to a method for preparing a microwave absorber, in particular to a method for preparing microwave absorbing materials and devices based on various types of ferrite solid waste, and belongs to the field of electromagnetic functional materials. Background technique [0002] With the rapid development of the Internet and artificial intelligence, the Internet of Everything has become a theme for a long time now and even in the future, and electromagnetic waves, as an indispensable medium for transmitting information, have caused a lot of clutter in the space while being widely used. The frequency of high-intensity electromagnetic waves has caused serious problems such as electromagnetic interference and electromagnetic radiation, especially electromagnetic interference has seriously affected the normal use of various electronic and electrical products. In addition, in 2020, the China Association for Science and Technology also release...

Claims

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Application Information

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IPC IPC(8): C04B35/38C04B35/622C04B35/626H01Q17/00
CPCC04B35/2658C04B35/622C04B35/6261C04B35/62695C04B35/62204H01Q17/004
Inventor 汪嘉恒吴运飞吴玉程沈宏江张学舟鲍智勇张勇李欣兴吕楠
Owner HEFEI UNIV OF TECH
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