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A preparation method of ferrite solid waste-based electromagnetic wave absorbing material doped with excessive zinc

A technology of absorbing materials and ferrite, which is applied in the direction of inorganic material magnetism, inductance/transformer/magnet manufacturing, circuits, etc., can solve the problems of aggravating electromagnetic interference of devices, device performance degradation, error reporting, etc., and achieve low equipment hardware requirements and production The effect of short cycle and avoiding pollution

Active Publication Date: 2022-06-07
合肥迈微新材料技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The severe near-field coupling caused by the miniaturization and integration of electronic circuits will aggravate the electromagnetic interference (EMI) between devices, causing device performance degradation, error reporting, and failure

Method used

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  • A preparation method of ferrite solid waste-based electromagnetic wave absorbing material doped with excessive zinc
  • A preparation method of ferrite solid waste-based electromagnetic wave absorbing material doped with excessive zinc
  • A preparation method of ferrite solid waste-based electromagnetic wave absorbing material doped with excessive zinc

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Experimental program
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Effect test

Embodiment 1

[0026] This embodiment uses soft magnetic ferrite solid waste as the precursor, which is mainly derived from grinding solid waste, waste magnetic core, waste generated in the production process of soft magnetic materials such as manganese zinc ferrite, nickel zinc ferrite and devices and devices Magnetic blanks, or crushed solid waste from waste ferrite cores in electronic waste, first purify soft ferrite solid waste by washing, dispersing, filtering, magnetic separation, etc., and then mix it with ferrite solid waste 10% zinc oxide is added, the mixed powder is ball-milled and pressed, and the pre-compact is heat-treated to prepare a ferrite solid waste-based broadband electromagnetic wave absorber. The specific preparation method includes the following steps:

[0027] Step 1: Purification of Soft Ferrite Solid Waste

[0028] 1a. Fully mix the soft ferrite solid waste powder with water, stir and disperse it, and then sieve to filter out some large metal chips, emery and other...

Embodiment 2

[0036]This embodiment uses soft magnetic ferrite solid waste as the precursor, which is mainly derived from grinding solid waste, waste magnetic core, waste generated in the production process of soft magnetic materials such as manganese zinc ferrite, nickel zinc ferrite and devices and devices Magnetic blanks, or crushed solid waste from waste ferrite cores in electronic waste, first purify soft ferrite solid waste by washing, dispersing, filtering, magnetic separation, etc., and then mix it with ferrite solid waste 14% zinc oxide was added, the mixed powder was ball-milled and pressed, and then the preform was heat-treated to prepare a ferrite solid waste-based broadband electromagnetic wave absorber. The specific preparation method includes the following steps:

[0037] Step 1: Purification of Soft Ferrite Solid Waste

[0038] 1a. Fully mix the soft ferrite solid waste powder with water and stir to disperse, then sieve to filter out some large metal chips, emery and other i...

Embodiment 3

[0046] This embodiment uses soft magnetic ferrite solid waste as the precursor, which is mainly derived from grinding solid waste, waste magnetic core, waste generated in the production process of soft magnetic materials such as manganese zinc ferrite, nickel zinc ferrite and devices and devices Magnetic blanks, or crushed solid waste from waste ferrite cores in electronic waste, first purify soft ferrite solid waste by washing, dispersing, filtering, magnetic separation, etc., and then mix it with ferrite solid waste 20% zinc oxide is added, the mixed powder is ball-milled and pressed, and the pre-compact is heat-treated to prepare a ferrite solid waste-based broadband electromagnetic wave absorber. The specific preparation method includes the following steps:

[0047] Step 1: Purification of Soft Ferrite Solid Waste

[0048] 1a. Fully mix the soft ferrite solid waste powder with water and stir to disperse, then sieve to filter out some large metal chips, emery and other impu...

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Abstract

The invention discloses a preparation method of ferrite solid waste-based electromagnetic wave absorbing material doped with excess zinc. Starting from the perspective of ferrite crystal structure, the spinel structure iron can be made through the substitution doping of excess zinc atoms Fe at the A site in the oxygen body 3+ in Zn 2+ Driven by the drive, more enter the B position, increase the molecular magnetic moment, greatly enhance the response of the magnetic moment to electromagnetic waves, thereby improving the magnetic loss performance of the low-loss magnetic core solid waste, and balancing the magnetic loss difference between different mixed solid waste , to obtain high-performance broadband electromagnetic wave absorbing materials and devices. The invention has simple operation, short production cycle and low requirements on equipment hardware, and can be widely used in electromagnetic shielding, anti-electromagnetic interference, and anti-electromagnetic radiation of various electronic and electrical and wireless communication equipment, and has excellent low-frequency electromagnetic wave absorption performance , is widely used.

Description

technical field [0001] The invention relates to a method for preparing a broadband electromagnetic wave absorbing material, in particular to a method for preparing an excessive zinc-doped ferrite solid waste-based electromagnetic wave absorbing material, which belongs to the technical field of electromagnetic functional materials. Background technique [0002] Soft ferrite materials are known as the cornerstone of the electronics, electrical and information industries, and soft ferrite devices are an important part of consumer electronics, communication interconnection, intelligent IoT and other related products. Since the 21st century, the leap-forward development of electrical and electronic fields led by scientific and technological progress, especially the advent of the era of Internet of Things, 5G, and new energy vehicles in recent years, has greatly increased the output of soft ferrite materials and devices. According to statistics, there are currently about 230 compa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/26C04B35/622H01F1/36H01F41/02
CPCC04B35/265C04B35/2658C04B35/62204H01F1/36H01F41/02C04B2235/3284
Inventor 汪嘉恒吴运飞张勇吴玉程
Owner 合肥迈微新材料技术有限公司
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