Magnetic sheet based on amorphous or nanocrystalline strip material and preparation method thereof

A technology of nanocrystalline strips and magnetic sheets, which is applied in chemical instruments and methods, inductance/transformer/magnet manufacturing, lamination devices, etc. problems such as controlling the permeability range of the magnetic sheet

Pending Publication Date: 2019-05-03
麦格磁电科技(珠海)有限公司
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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

Method used

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  • Magnetic sheet based on amorphous or nanocrystalline strip material and preparation method thereof
  • Magnetic sheet based on amorphous or nanocrystalline strip material and preparation method thereof
  • Magnetic sheet based on amorphous or nanocrystalline strip material and preparation method thereof

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preparation example Construction

[0036] The present invention provides a method for preparing the above-mentioned magnetic flakes based on amorphous or nanocrystalline strips, comprising the following steps:

[0037] (1) heat-treating the amorphous or nanocrystalline ribbon;

[0038] (2) laminating the bonding layer on the heat-treated amorphous or nanocrystalline strip in the step (1) to obtain a composite strip;

[0039] (3) crushing the composite strip into scales, and then sequentially performing spray oxidation treatment or hot water spray treatment to obtain an amorphous or nanocrystalline single-layer structure;

[0040] (4) Laminating the amorphous or nanocrystalline single-layer structure to obtain the magnetic flakes.

[0041] In the present invention, the amorphous or nanocrystalline ribbon is first heat-treated. In the present invention, when heat-treating the amorphous strip, the heat-treatment temperature is preferably 350-450°C, more preferably 380-440°C; the heat-treatment time is preferably...

Embodiment 1

[0051] (1) heat-treat the iron-based amorphous strip with a thickness of 25 μm±3 μm in a vacuum environment, the temperature of the heat treatment is 420° C., and the time is 2 hours;

[0052] (2) A layer of polyacrylic single-sided tape is laminated on the heat-treated amorphous strip, and the thickness of the tape is 3 μm;

[0053] (3) Use a circular pressure roller with a quadrangular pyramid texture on the surface to crush the side of the amorphous strip without the composite tape to obtain a scaly amorphous strip; wherein the crushing pressure is 6kg / cm 2 , the number of times is 1; the height of the square pyramid is 0.1mm, and the width is 0.1mm;

[0054] (4) Use water spray to carry out spray oxidation treatment to described scaly amorphous strip material, obtain composite strip material; Wherein the temperature of spray oxidation treatment is 40 ℃, time is 25min; After spray oxidation treatment, to described composite strip material washing and drying;

[0055] (5) ...

Embodiment 2

[0058] (1) The iron-based nanocrystalline strip with a thickness of 20 μm ± 3 μm is heat-treated under nitrogen protection, the temperature of the heat treatment is 550 ° C, and the time is 1.5 h;

[0059] (2) A layer of polyacrylic double-sided tape is laminated on the heat-treated nanocrystalline strip, and the thickness of the tape is 5 μm;

[0060] (3) use the circular pressure roller with quadrangular pyramid texture on the surface to crush the side of the nanocrystalline tape without the composite tape to obtain the scaly nanocrystalline tape; wherein the crushing pressure is 5kg / cm 3 , the number of times is 2 times; the height of the quadrangular pyramid is 1mm, the width is 2mm, and the length is 1.5mm;

[0061] (4) Using CO 2 Aqueous solution spray spray oxidation treatment on the said scaly nanocrystalline strips to obtain composite strips; wherein CO 2 The pH value of the aqueous solution is 5.6, the temperature of the spray oxidation treatment is 60° C., and the...

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Abstract

The invention provides a magnetic sheet based on an amorphous or nanocrystalline strip material and a preparation method thereof, which belong to the technical field of wireless power supply systems.The magnetic sheet based on the amorphous or nanocrystalline strip material provided by the invention is formed by laminating a plurality of single-layer structures, wherein each single-layer structure comprises a magnetic layer, a bonding layer and an oxide layer; the magnetic layer is of a scaly structure, and the scaly structure can increase contact resistance and reduce eddy current loss; andthe oxide layer has high electrical resistivity and can replace the conventional air or bonding layer for insulation. Through controlling the thickness of the oxide layer, the gasp of the scaly structures can be controlled, and the precise controllability of the magnetic conductivity of the magnetic sheet is realized. Meanwhile, the bonding layers of the magnetic sheets do not fill in the gaps ofthe scaly structures, thus the bonding thickness can be reduced, and the thickness of the magnetic sheet is small.

Description

technical field [0001] The invention relates to the technical field of wireless power supply systems, in particular to a magnetic sheet based on an amorphous or nanocrystalline ribbon and a preparation method thereof. Background technique [0002] In recent years, wireless charging of mobile phones has attracted widespread attention. The wireless power supply generally adopts the electromagnetic induction method, and its system is basically composed of a coil module and circuit at the transmitting end, and a coil module and circuit at the receiving end. The transmitter and receiver modules generally contain planar helical coils whose function is to convert electrical energy into magnetic energy. When the conversion energy is directly transmitted through the coil, since the transmission medium is air, its magnetic permeability is low, and the magnetic energy transmission efficiency is low. At the same time, the leaked magnetic flux generates eddy currents in the external me...

Claims

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Application Information

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IPC IPC(8): H01F41/02H02J50/70B32B3/16B32B3/22B32B7/12B32B33/00B32B37/12B32B38/00
Inventor 尉晓东
Owner 麦格磁电科技(珠海)有限公司
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