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Preparation method of excessive zinc-doped ferrite solid waste-based electromagnetic wave absorption material

A technology of absorbing materials and ferrite, which is applied in the fields of magnetism of inorganic materials, manufacturing of inductors/transformers/magnets, circuits, etc., can solve problems such as aggravating electromagnetic interference of devices, degradation of device performance, error reporting, etc., and achieves low requirements for equipment hardware and production The effect of short cycle and avoiding pollution

Active Publication Date: 2019-12-13
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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  • Preparation method of excessive zinc-doped ferrite solid waste-based electromagnetic wave absorption material
  • Preparation method of excessive zinc-doped ferrite solid waste-based electromagnetic wave absorption material
  • Preparation method of excessive zinc-doped ferrite solid waste-based electromagnetic wave absorption material

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Effect test

Embodiment 1

[0026] In this embodiment, soft magnetic ferrite solid waste is used as a precursor, which mainly comes from soft magnetic materials such as manganese zinc ferrite and nickel zinc ferrite and solid grinding waste, waste magnetic core, waste Magnetic blanks, or crushed solid waste from ferrite cores in electronic waste, firstly purify the soft magnetic ferrite solid waste by washing, dispersing, filtering, magnetic separation, etc., and then mix the ferrite solid waste with Adding 10% zinc oxide, ball milling and pressing the mixed powder, and heat-treating the preform 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. Take the soft magnetic ferrite solid waste powder and mix it fully with water and stir to disperse it, then sieve to filter out some larger metal scraps, corundum and other impurity particles, and then a...

Embodiment 2

[0036]In this embodiment, soft magnetic ferrite solid waste is used as a precursor, which mainly comes from soft magnetic materials such as manganese zinc ferrite and nickel zinc ferrite and solid grinding waste, waste magnetic core, waste Magnetic blanks, or crushed solid waste from ferrite cores in electronic waste, firstly purify the soft magnetic ferrite solid waste by washing, dispersing, filtering, magnetic separation, etc., and then mix the ferrite solid waste with Adding 14% zinc oxide, ball milling and pressing the mixed powder, and heat-treating the preform 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. Take the solid waste powder of soft magnetic ferrite and mix it fully with water, stir and disperse, then filter out some larger metal debris, corundum and other impurity particles by sieving, and then ap...

Embodiment 3

[0046] In this embodiment, soft magnetic ferrite solid waste is used as a precursor, which mainly comes from soft magnetic materials such as manganese zinc ferrite and nickel zinc ferrite and solid grinding waste, waste magnetic core, waste Magnetic blanks, or crushed solid waste from ferrite cores in electronic waste, firstly purify the soft magnetic ferrite solid waste by washing, dispersing, filtering, magnetic separation, etc., and then mix the ferrite solid waste with Adding 20% ​​zinc oxide, ball milling and pressing the mixed powder, and heat-treating the preform 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. Take the solid waste powder of soft magnetic ferrite and mix it fully with water, stir and disperse, then filter out some larger metal debris, corundum and other impurity particles by sieving, and then...

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Abstract

The invention discloses a preparation method of an excessive zinc-doped ferrite solid waste-based electromagnetic wave absorption material. From the perspective of a ferrite crystal structure, throughdisplacement doping of excessive zinc atoms, more Fe<3+> can at site A in spinel structure ferrite can enter site B under the driving of Zn<2+>, the molecular magnetic moment is increased, and the response of magnetic moment to electromagnetic wave is greatly enhanced, thus improving the magnetic loss performance of low-loss magnetic core solid waste, balancing the magnetic loss difference between different mixed solid wastes, and acquiring the high performance broadband electromagnetic wave absorption material and device. The method provided by the invention has the characteristics of simpleoperation, short production period and low requirement for equipment hardware, the electromagnetic wave absorption material can be widely popularized in electromagnetic shielding, electromagnetic interference resistance, electromagnetic radiation resistance and other uses of various electronic and electrical and wireless communication equipment, has excellent low-frequency-band electromagnetic wave absorption performance, and has very wide application.

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 electronics, electrical, and information industries. Soft ferrite devices are an important part of consumer electronics, communication interconnection, intelligent IoT and other related products. Since the 21st century, the leapfrog development in the electrical and electronic fields led by scientific and technological progress, especially in recent years, the arrival of the Internet of Things, 5G, and the era of new energy vehicles, has greatly increased the output of soft ferrite materials and devices. According to statistics, there are currently about 230 enterp...

Claims

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Application Information

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Patent Type & Authority Applications(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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