A magnetic sheet based on amorphous or nanocrystalline ribbon and its preparation method

A technology of nanocrystalline strips and magnetic sheets, applied in the manufacture of inductors/transformers/magnets, preventing/reducing unwanted electrical/magnetic influences, components of transformers/inductors, etc. The range of magnetic permeability of the sheet, the inability to control the gap between the thin sheets well, and the influence of the normal use of the magnetic sheet, etc., can improve the charging efficiency, accurately control the magnetic permeability, and achieve the effect of low price.

Active Publication Date: 2022-04-05
DONGGUAN HONGYI THERMAL CONDUCTMTY MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the magnetic permeability of the magnetic sheet is very sensitive to the size of the gap between the thin sheets. This method cannot well control the gap between the thin sheets, and the range of the magnetic permeability of the magnetic sheet cannot be well controlled, and the production efficiency is very low. Low
In addition, during use, the magnetic sheet is prone to eddy current heating in the magnetic field. If the heat conduction and heat dissipation performance is poor, it will affect the normal use of the magnetic sheet.

Method used

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  • A magnetic sheet based on amorphous or nanocrystalline ribbon and its preparation method
  • A magnetic sheet based on amorphous or nanocrystalline ribbon and its preparation method
  • A magnetic sheet based on amorphous or nanocrystalline ribbon and its preparation method

Examples

Experimental program
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Effect test

Embodiment 1

[0035] Preparation of Magnetic Flakes Based on Amorphous or Nanocrystalline Ribbons:

[0036] First, the amorphous or nanocrystalline ribbon with a thickness of 100 μm is heat-treated and crushed to obtain an amorphous or nanocrystalline ribbon with a scaly structure; secondly, polytetrafluoroethylene, hydroxyethyl acrylate, thermally conductive filler, iron Hydrogen phosphate and deionized water are mixed to make an insulating thermally conductive glue, and poured on one side of an amorphous or nanocrystalline strip with a scale-like structure, and part of the insulating thermally conductive glue is filled in the gaps of the scale-like structure to form An insulating and thermally conductive adhesive layer with a thickness of 0.01 μm, and another part of the insulating and thermally conductive adhesive solution is evenly coated on the surface of the amorphous or nanocrystalline strip to form an insulating and thermally conductive adhesive layer with a thickness of 3 μm. Among ...

Embodiment 2

[0038] Preparation of Magnetic Flakes Based on Amorphous or Nanocrystalline Ribbons:

[0039]First, the amorphous or nanocrystalline ribbon with a thickness of 100 μm is heat-treated and crushed to obtain an amorphous or nanocrystalline ribbon with a scaly structure; secondly, polytetrafluoroethylene, hydroxyethyl acrylate, thermally conductive filler, iron Hydrogen phosphate and deionized water are mixed to make an insulating thermally conductive glue, and poured on one side of an amorphous or nanocrystalline strip with a scale-like structure, and part of the insulating thermally conductive glue is filled in the gaps of the scale-like structure to form An insulating and thermally conductive adhesive layer with a thickness of 1 μm, and another part of the insulating and thermally conductive adhesive solution is evenly coated on the surface of the amorphous or nanocrystalline strip to form an insulating and thermally conductive adhesive layer with a thickness of 20 μm. Among the...

Embodiment 3

[0041] Preparation of Magnetic Flakes Based on Amorphous or Nanocrystalline Ribbons:

[0042] First, the amorphous or nanocrystalline ribbon with a thickness of 100 μm is heat-treated and crushed to obtain an amorphous or nanocrystalline ribbon with a scaly structure; secondly, polytetrafluoroethylene, hydroxyethyl acrylate, thermally conductive filler, iron Hydrogen phosphate and deionized water are mixed to make an insulating thermally conductive glue, and poured on one side of an amorphous or nanocrystalline strip with a scale-like structure, and part of the insulating thermally conductive glue is filled in the gaps of the scale-like structure to form An insulating and thermally conductive adhesive layer with a thickness of 0.05 μm, and another part of the insulating and thermally conductive adhesive solution is evenly coated on the surface of the amorphous or nanocrystalline strip to form an insulating and thermally conductive adhesive layer with a thickness of 10 μm. Among...

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Abstract

The invention belongs to the technical field of wireless charging components, and in particular relates to a magnetic sheet based on an amorphous or nanocrystalline ribbon, including an amorphous or nanocrystalline ribbon, one side of which is provided with an oxide layer, The other side of the amorphous or nanocrystalline ribbon is sequentially provided with an insulating and thermally conductive adhesive layer, a first graphene oxide layer, an artificial graphite film layer, a second graphene oxide layer and a protective film layer; the amorphous or nanocrystalline The strip has a scale structure, and gaps exist between the scale structures, and the gaps are filled with the insulating and heat-conducting adhesive layer. Compared with the prior art, the magnetic sheet of the present invention has small thickness, good heat dissipation performance, low eddy current loss, and precise and controllable magnetic permeability. In addition, the invention also relates to a method for preparing magnetic flakes based on amorphous or nanocrystalline strips, which is simple to operate and low in cost, and is suitable for mass production.

Description

technical field [0001] The invention belongs to the technical field of wireless charging components, and in particular relates to a magnetic sheet based on an amorphous or nanocrystalline ribbon and a preparation method thereof. Background technique [0002] For consumer electronic products, wireless charging has the advantages of convenient operation and strong versatility. Wireless charging technology, also known as non-contact charging, realizes wireless charging by means of battery induction or frequency resonance generated by coils arranged on both sides of the transmitting end and receiving end. Among them, there are usually metal parts such as batteries near the coil at the receiving end. When wireless charging is performed through battery induction, eddy currents will be formed on the metal parts. In order to shield these interferences, it is usually necessary to paste a magnetic sheet on the back of the coil at the receiving end. [0003] At present, the magnetic ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01F27/36H01F27/34H01F27/22H01F38/14H01F41/02
CPCH01F27/36H01F27/34H01F27/22H01F38/14H01F41/02H01F2027/348
Inventor 朱全红
Owner DONGGUAN HONGYI THERMAL CONDUCTMTY MATERIAL CO LTD
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