Fragmentation Treatment Technology of Magnetic Materials for Electromagnetic Shielding

A technology of electromagnetic shielding and processing technology, applied in chemical instruments and methods, lamination auxiliary operations, lamination, etc., can solve the problems of large high-frequency loss, reduce the magnetic isolation effect of electromagnetic shielding, and large eddy current effects, and achieve high-efficiency frequency performance and stability, improve stability and production efficiency, and reduce energy loss

Inactive Publication Date: 2020-06-23

葛理想

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AI-Extracted Technical Summary

Problems solved by technology

Moreover, the eddy current effect inside the large scale particles is large, the magnetic loss of the entire magnetic sheet is uneven, the local heating is serious, and the performance consistency is poor, which may reduce its electromagnetic s...

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Method used

1) Using amorphous and nanocrystalline strips with excellent soft magnetic properties such as low loss and high magnetic permeability as soft magnetic material magnetic sheets can effectively reduce energy loss in the wireless charging process, reduce heat generation and Electromagnetic interference from the...

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Abstract

The invention relates to a fragmentation treatment technology of a magnetic material for electromagnetic shielding. The specific steps include: S1) providing a soft magnetic material magnetic sheet, and winding the soft magnetic material magnetic sheet; S2) subjecting the wound soft magnetic material magnetic sheet to heat treatment; S3) performing single-side coating on the heat treated soft magnetic material magnetic sheet; S4) using a patterned pinhole plane pressure block to perform graphical processing on the graphical side of the soft magnetic material magnetic sheet; S5) coating the surface subjected to graphical processing; S6) bonding the coated surface in step 5) to the graphical processed surface of another soft magnetic material magnetic sheet, conducting overlaying to a required number of layers, and then conducting lamination operation on the whole, wherein the another soft magnetic material magnetic sheet is obtained by the S1) to S4).

Application Domain

Lamination ancillary operationsLamination +1

Technology Topic

Coated surfaceMaterials science +3

Examples

Experimental program(1)

Example Embodiment

[0035] Examples:

[0036] This embodiment shows a shredding treatment process of a magnetic material for electromagnetic shielding. The specific steps are as follows:

[0037] S1) Provide a soft magnetic material magnetic sheet, and wind the soft magnetic material magnetic sheet;

[0038] S2) heat-treating the wound magnetic sheet of soft magnetic material;

[0039] S3) Single-sided coating of the soft magnetic material magnetic sheet after the heat treatment;

[0040] S4) Graphically process the uncoated side of the soft magnetic material magnetic sheet by using a pinhole flat pressing block with patterns;

[0041] S5) Gluing the patterned surface;

[0042] S6) Adhere the coated surface of the step S5) to the patterned surface of another piece of soft magnetic material magnetic sheet, laminate it to the required number of layers, and then perform the entire lamination operation. A piece of soft magnetic material is obtained after the steps S1) to S4).

[0043] In step S1), the preparation method of the soft magnetic material magnetic sheet is as follows:

[0044] K1) Bond the outer surface of the soft magnetic alloy magnetic strip to the double-sided tape with PET substrate on the back;

[0045] K2) Through the pulling action of the roller, the coated soft magnetic alloy magnetic strip is punched and laminated through a flat press block with pinholes, and the pinholes on the press block are printed with corresponding grid patterns ( Including rectangle, cone, triangle, diamond, linear, etc.), and the pinholes are evenly distributed on the compact, the pinhole length is about 1mm, the pinhole area is 0.1-10mm2, and the pinhole gap is between 0.1-50μm;

[0046] K3) Fragment the soft magnetic alloy magnetic material into a series of soft magnetic alloy roll strips composed of scale particles with a uniform shape distribution, clear edge cracks, and a size of 0.1~3mm to provide a soft magnetic material magnetic sheet.

[0047] Step K1) The medium soft magnetic alloy magnetic strip is Fe-based, Co-based/FeNi-based amorphous/nanocrystalline alloy, and soft magnetic electrical alloy steel strip.

[0048] The soft magnetic material magnetic sheet is an amorphous or nanocrystalline soft magnetic material strip.

[0049] The composition of the soft magnetic material magnetic sheet is composed of at least one metal and at least one non-metal element among Fe, Co, Ni, Zr, Hf, Si, B, and P.

[0050] The thickness of the soft magnetic material magnetic sheet ranges from 5 to 50 μm.

[0051] In the step S2), the step of heat-treating the soft magnetic material magnetic sheet as an amorphous soft magnetic material strip includes: first heating up to 350-380°C, keeping the temperature, and then continuing to heat up to 400-500°C, and then Insulation, the heating time is 1 to 3 hours, and the holding time is 1 to 10 hours.

[0052] In the step S2), the step of heat-treating the soft magnetic material magnetic sheet as a nanocrystalline soft magnetic material strip includes: first raising the temperature to 300~450°C, keeping the temperature, and then continuing to raise the temperature to 450~510°C, keeping the temperature, Then continue to heat up to 510~580°C, and then keep warm, where the heating time is 1~3 hours, and the holding time is 1~10 hours.

[0053] While performing the heat treatment in step S2), the treatment of applying transverse magnetic field, longitudinal magnetic field, rotating magnetic field or no magnetic field is performed.

[0054] In the step S3), the soft magnetic material magnetic sheet after the heat treatment is coated on one side by roll-to-roll.

[0055] In the step S4), the operation graphic processing is performed, mainly using the small pinholes with patterns to press and punch the strip, and the pattern area after pressing is 0.1~5mm 2 , The pattern gap is 0.1~50μm.

[0056] In the step S6), after the laminating operation is performed, it further includes the following steps:

[0057] W1) Punching the structure obtained after the lamination operation according to the size requirements to obtain a laminated magnetic sheet of the required size;

[0058] W2) laminating the laminated magnetic sheet, ferrite magnetic sheet, graphite sheet and coil to obtain an electromagnetic shielding sheet.

[0059] Compared with the prior art, the preparation method of the electromagnetic shielding sheet for wireless charging of the present invention has the following beneficial effects:

[0060] 1) The use of amorphous and nanocrystalline strips with excellent soft magnetic properties such as low loss and high magnetic permeability as the soft magnetic material magnetic sheet can effectively reduce the energy loss during the wireless charging process, reduce heat generation and the surrounding environment Electromagnetic interference

[0061] 2) The heat treatment steps used in the present invention can improve high-frequency performance and stability and improve charging efficiency through suitable heat treatment parameters;

[0062] 3) The present invention uses lamination pressure control and coupling degree control to perform graphic processing on the strip, which can achieve the goal of uniform and rapid processing of the graphic, and improve the stability and production efficiency of the magnetic sheet.

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PUM

Property	Measurement	Unit
Size	0.1 ~ 3.0	mm
Thickness	5.0 ~ 50.0	µm
tensile		MPa
Particle size		Pa
strength	10

Description & Claims & Application Information

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Classification and recommendation of technical efficacy words

High permeability
Reduce energy loss

Fragmentation Treatment Technology of Magnetic Materials for Electromagnetic Shielding

AI-Extracted Technical Summary

Problems solved by technology

Method used

Abstract

Examples

Example Embodiment

PUM

Description & Claims & Application Information

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