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A kind of broadband composite magnetic isolation sheet and preparation method thereof

A technology of magnetic isolation sheet and wide frequency band, which is applied in the field of broadband composite magnetic isolation sheet and its preparation, and can solve the problem of low frequency of use of magnetic isolation sheet

Active Publication Date: 2020-02-21
苏州世诺新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a wide-band composite magnetic isolation sheet and its preparation method in view of the problem that the frequency of use of the existing magnetic isolation sheet is too low

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Using the rapid quenching method, prepare 18μm nanocrystalline flakes; Y, Co, Mn according to the atomic ratio Y 2 co 16 mn 0.1 Melted into a master alloy, homogenized at 700°C for 240 hours in a nitrogen atmosphere, and then prepared into a 10 μm sheet by rolling; the nanocrystalline sheet and Y 2 co 16 mn 0.1 The flakes are pasted into a multi-layer alternating structure by ultra-thin double-sided adhesive tape, and then shredded.

[0022] Tested by a vector network analyzer, the cutoff frequency is 8.5GHz, and the initial permeability can reach 22.

Embodiment 2

[0024] Using the rapid quenching method, prepare 20μm nanocrystalline flakes; Y, Co, Cu according to the atomic ratio Y 2 co 15.5 Cu 1.5 Melted into a master alloy, homogenized at 850°C for 140 hours in a nitrogen atmosphere, and then prepared into a 15 μm sheet by rolling; the nanocrystalline sheet and Y 2 co 15.5 Cu 1.5 The flakes are pasted into a multi-layer alternating structure by ultra-thin double-sided adhesive tape, and then shredded.

[0025] Tested by a vector network analyzer, the cutoff frequency is 9.2GHz, and the initial permeability can reach 26.

Embodiment 3

[0027] Using the rapid quenching method, prepare 15μm nanocrystalline flakes; Y, Co, Ni according to the atomic ratio Y 2 co 15 Ni 2 Melted into a master alloy, homogenized at 1000°C for 100 h in a nitrogen atmosphere, and then prepared into a 20 μm sheet by a rapid quenching method; the nanocrystalline sheet and Y 2 co 15 Ni 2 The flakes are pasted into a multi-layer alternating structure by ultra-thin double-sided adhesive tape, and then shredded.

[0028] Tested by a vector network analyzer, the cutoff frequency is 10.1GHz, and the initial permeability can reach 23.

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Abstract

The invention discloses a broadband composite magnetic separator and a preparation method thereof, wherein the wide frequency band composite magnetic separator comprises a nanocrystalline thin sheet and Y2Co17-xMx sheet multilayer alternating structure; Main Process Steps: preparation of nanocrystalline sheet, Y2Co17-XMx thin sheet preparation, composite magnetic separator preparation. The magnetic separator of the invention has a cutoff frequency higher than 8 GHz and an initial permeability higher than 20, and can be compatible with wireless applications from KHz to GHz at the same time.

Description

technical field [0001] The invention relates to a broadband composite magnetic isolation sheet and a preparation method thereof, and belongs to the field of new materials and new technologies of electronic components. Background technique [0002] With the rapid development of electronic technology, the functions of electronic products are becoming more and more powerful. In order to solve the problem of battery life of electronic products, wireless charging, as a new technology, has received extensive attention in recent years. According to the working frequency, wireless charging can be divided into electromagnetic induction (<300KHz), magnetic resonance (6.78MHz) and radio wave (GHz). [0003] The current commercial application is the electromagnetic induction type, which has the problem of small charging distance. The radio wave method will become the mainstream method of wireless charging in the future because it can not be limited by the charging position. At the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01F7/00H01F1/147H01F41/02
CPCH01F1/147H01F7/00H01F41/02
Inventor 顾正青韩朝庆计建荣
Owner 苏州世诺新材料科技有限公司