Nanocrystalline alloy electromagnetic shielding sheet, preparing method, nanocrystalline alloy and shielded antenna

A nanocrystalline alloy and electromagnetic shielding technology, which is applied in the field of nanocrystalline alloy and shielding antenna, nanocrystalline alloy electromagnetic shielding sheet and its preparation, to achieve the effects of stable performance, low loss and low cost

Active Publication Date: 2017-11-17
SHANGHAI LINEPRINTING MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, ordinary magnetic shielding materials can only suppress electromagnetic interference in a certain frequency band, but cannot play a good electromagnetic shielding effect in a wide range.

Method used

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  • Nanocrystalline alloy electromagnetic shielding sheet, preparing method, nanocrystalline alloy and shielded antenna
  • Nanocrystalline alloy electromagnetic shielding sheet, preparing method, nanocrystalline alloy and shielded antenna
  • Nanocrystalline alloy electromagnetic shielding sheet, preparing method, nanocrystalline alloy and shielded antenna

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] A nanocrystalline alloy, the general formula of the nanocrystalline alloy is:

[0045] Fe 100-d-e-f-g-z-m D. d E. e f h Si f B g Ni z co m

[0046] In the above general formula, D represents at least one element selected from Cu and Au, E represents at least one element selected from V, Ta, Mo, Mn, Cr, Nb, and F represents at least one element selected from P, C, At least one element in Se; d, e, h, f, g, z and m satisfy the relational expressions 0.01at%≤d≤3at%, 0.01at%≤e≤5at%, 0.01at%≤h≤3at %, 0at%≤f≤25at%, 0at%≤g≤20at%, 0at%≤z≤40at%, 0at%≤m≤40at%, 10at%≤d+e+h+f+g+z+ The number of m≤60at%.

[0047] Specifically, in the above mathematical formula 1:

[0048] The D element is used for the nucleation of crystal grains and prevents the coarsening of crystal grains, thereby improving the magnetic permeability of the alloy and reducing loss. When the content of element D is too small, it will be difficult to obtain the effect of suppressing the coarsening of cry...

Embodiment 2

[0087] The general formula of using nanocrystals is: 1k10, and the composition is Fe 52.1 Cu 0.5 V 4 P 1 Si 10 B 12 Ni 20 co 0.4 (atomic ratio);

[0088] Table 1

[0089]

[0090] Table 2

[0091]

[0092] As shown in Table 1, it is the electrical performance of the original state of the product module. At 200kHz, the inductance of the nanocrystalline magnetic sheet unit used for the WPC function is slightly higher than the inductance required by the WPC function; when the NFC module is tested, the Fr value of the NFC module Lower than the NFC specification requirements.

[0093] As shown in Table 2, the nanocrystalline magnetic sheet units for NFC and WPC were respectively adjusted by using the magnetic fragmentation optimization process. At the same time, the nanocrystalline magnetic sheet used for WPC / NFC function meets the electrical performance requirements of the module.

[0094] At the same time, the different stacking orders of the NFC functional magn...

Embodiment 3

[0096] The general formula of using nanocrystals is: 1k113, and the composition is Fe 49.5 Au 1 mn 3 Se 1.5 Si 14 B 8 Ni 10 co 13 (atomic ratio);

[0097] Table 1

[0098]

[0099] Table 2

[0100]

[0101] As shown in Table 1, it is the electrical performance of the original state of the product module. At 200kHz, the inductance of the nanocrystalline magnetic sheet unit used for the WPC function is slightly higher than the inductance required by the WPC function; when the NFC module is tested, the Fr value of the NFC module Lower than the NFC specification requirements.

[0102] As shown in Table 2, the nanocrystalline magnetic sheet units for NFC and WPC were respectively adjusted by using the magnetic fragmentation optimization process. At the same time, the nanocrystalline magnetic sheet used for WPC / NFC function meets the electrical performance requirements of the module.

[0103] At the same time, the different stacking orders of the NFC functional mag...

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Abstract

The invention relates to a nanocrystalline alloy electromagnetic shielding sheet, a preparing method, a nanocrystalline alloy and a shielded antenna. The general formula of the nanocrystalline alloy is Fe100-d-e-f-g-z-mDdEeFhSifBgNizCom; the electromagnetic shielding sheet made of the nanocrystalline alloy has the high magnetic permeability and the low losses within the using frequency domain; and when the nanocrystalline alloy electromagnetic shielding sheet is used in NFC, the requirement for the electromagnetic shielding sheet is that at the corresponding frequency, the magnetic permeability of the electromagnetic shielding sheet is within a certain scope, and the losses are low.

Description

technical field [0001] The invention belongs to the field of magnetic materials, and relates to a composite material, an electromagnetic shielding material, a module and a method for manufacturing and optimizing its electrical performance, in particular to a nanocrystalline alloy electromagnetic shielding sheet and a preparation method, a nanocrystalline alloy and a shielding antenna. Background technique [0002] With the rapid popularization of mobile phones, the uplink and downlink data rates supported by wireless networks continue to increase, and new applications, especially data service applications, continue to emerge. Mobile phones have become an indispensable information terminal around people. More and more people use mobile phones instead of watches, notepads, MP3 players, and bank cards. [0003] NFC (Near Field Communication) technology will make all this a reality. This technology was proposed by Nokia, Philips and Sony in 2004. At present, there are 11 sponso...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/16C22C38/12C22C38/02C22C38/08C22C38/10C22C38/04C22C38/60C22C38/42C22C38/52C22C38/54C22C30/00C22C30/02H01Q1/40
CPCH01Q1/40C22C38/002C22C38/02C22C38/04C22C38/105C22C38/12C22C38/16C22C38/32C22C38/42C22C38/52C22C38/54C22C38/60
Inventor 李家洪
Owner SHANGHAI LINEPRINTING MATERIALS CO LTD
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