Sandwich structure giant magneto-impedance effect composite material and preparation method

A technology of giant magneto-impedance and composite materials, applied in the field of magnetic sensitive components, can solve the problems such as the inability of the giant magneto-impedance value to be significantly improved and the magnetic flux path to be unable to be well closed, to enhance the GMI effect, suitable for mass production, The effect of increasing sensitivity

Active Publication Date: 2021-02-09
EAST CHINA NORMAL UNIVERSITY
View PDF6 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the existence of stray fields and flux leakage, the magnetic flux path cann

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Sandwich structure giant magneto-impedance effect composite material and preparation method
  • Sandwich structure giant magneto-impedance effect composite material and preparation method
  • Sandwich structure giant magneto-impedance effect composite material and preparation method

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0028]Example 1

[0029]Step 1: Take iron-based amorphous Fe73.5Cu1Nb3Si13B9.5One strip

[0030]Step 2: Place the iron-based amorphous ribbon of step 1 in a tube furnace, set the vacuum to 1.5pa, heat up to 540°C, pass in 5 sccm of hydrogen, and anneal for 20 minutes to obtain the iron-based nanocrystalline ribbon;

[0031]Step 3: Place the iron-based nanocrystalline strips obtained in step 2 in 0.4M NaOH, 0.5 M Na2CO3And 0.7M Na3PO4·12H2Degreasing and cleaning treatment in the O mixed solution, the treatment time is 10 minutes;

[0032]Step 4: Place the strip obtained in step 3 in a 5M HCl solution for acidification treatment, the treatment time is 20 minutes;

[0033]Step 5: Place the strip obtained in step 4 in 0.3M SnCl2· 2H2Sensitization is carried out in a mixed solution of O and 0.6M HCl, and the treatment time is 20 minutes;

[0034]Step 6: Place the strip obtained in step 5 on 2.5×10-4M PdCl2Activate it in a mixed solution of 0.6M HCl, and the processing time is 20 minutes;

[0035]Step 7: Disp...

Example Embodiment

[0042]Example 2

[0043]Step 1: Take iron-based amorphous Fe73.5Cu1Nb3Si13B9.5One strip

[0044]Step 2: Place the iron-based amorphous ribbon of step 1 in a tube furnace, set the vacuum to 1.9pa, heat up to 540°C, pass in 5 sccm of hydrogen, and anneal for 20 minutes to obtain the iron-based nanocrystalline ribbon;

[0045]Step 3: Place the iron-based nanocrystalline strips obtained in step 2 in 0.4M NaOH, 0.5 M Na2CO3And 0.7M Na3PO4·12H2Degreasing and cleaning treatment in the O mixed solution, the treatment time is 20 minutes;

[0046]Step 4: Place the strip obtained in step 3 in a 5M HCl solution for acidification treatment, the treatment time is 20 minutes;

[0047]Step 5: Place the strip obtained in step 4 in 0.3M SnCl2· 2H2Sensitization is carried out in a mixed solution of O and 0.6M HCl, and the treatment time is 20 minutes;

[0048]Step 6: Place the strip obtained in step 5 on 2.5×10-4M PdCl2Activate it in a mixed solution of 0.6M HCl, and the processing time is 20 minutes;

[0049]Step 7: Disp...

Example Embodiment

[0056]Example 3

[0057]Step 1: Take iron-based amorphous Fe73.5Cu1Nb3Si13B9.5One strip

[0058]Step 2: Place the iron-based amorphous ribbon of step 1 in a tube furnace, set the vacuum to 2pa, heat up to 540°C, pass in 5 sccm of hydrogen, and anneal for 20 minutes to obtain the iron-based nanocrystalline ribbon;

[0059]Step 3: Place the iron-based nanocrystalline strips obtained in step 2 in 0.4M NaOH, 0.5 M Na2CO3And 0.7M Na3PO4·12H2Degreasing and cleaning treatment in the O mixed solution, the treatment time is 10 minutes;

[0060]Step 4: Place the strip obtained in step 3 in a 5M HCl solution for acidification treatment, the treatment time is 20 minutes;

[0061]Step 5: Place the strip obtained in step 4 in 0.3M SnCl2· 2H2Sensitization is carried out in a mixed solution of O and 0.6M HCl, and the treatment time is 10 minutes;

[0062]Step 6: Place the strip obtained in step 5 on 2.5×10-4M PdCl2Activate it in a mixed solution of 0.6M HCl, and the processing time is 20 minutes;

[0063]Step 7: Take a...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
Concentrationaaaaaaaaaa
Login to view more

Abstract

The invention discloses a sandwich structure giant magneto-impedance effect composite material and a preparation method. According to the preparation method, a reduced graphene oxide (rGO) inner layeris synthesized on a nanocrystalline Fe73.5. 5Cu1Nb3Si13B9.5 strip of a sensitive element of a giant magneto-impedance sensor through one-step chemical plating, a FeCo outer layer is obtained througha magnetron sputtering method, and the giant magneto-impedance (GMI) effect composite of the FeCo/rGO/FINEMET/rGO/FeCo sandwich structure is obtained. The invention has the beneficial effects that onone hand, the reduced graphene oxide layer is used as a high-conductivity layer, a channel beneficial to high-frequency current flowing is provided, and the skin effect is greatly reduced; on the other hand, the FeCo layer increases the magnetic conductivity, and a closed magnetic circuit is provided. Finally, the giant magneto-impedance (GMI) effect composite material with the FeCo/rGO/FINEMET/rGO/FeCo sandwich structure obtains a remarkably enhanced GMI effect, the sensitivity of the GMI sensor is also improved, the process is simple, and the giant magneto-impedance composite material is suitable for mass production.

Description

technical field [0001] The invention belongs to the field of magnetic sensitive elements, and relates to synthesizing an inner layer of reduced graphene oxide (rGO) by one-step chemical plating in a sensitive element of a giant magneto-impedance sensor, obtaining an outer layer of FeCo by a magnetron sputtering method, and preparing a giant magneto-impedance (GMI) FeCo / rGO / FINEMET / rGO / FeCo sandwich structure giant magnetoimpedance effect composite material with improved effect. Background technique [0002] The giant magneto-impedance (GMI) effect refers to the effect that the AC impedance of magnetic materials changes significantly with the change of the applied DC magnetic field. Compared with the traditional Hall sensor, the giant magnetoresistance sensor, the giant magnetoresistance effect, as a new magnetic sensing technology, has higher signal output strength and higher weak magnetic field sensitivity; and superconducting quantum interferometer, Compared with fluxgate...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): H01L43/12H01L43/08H01L43/10
CPCH10N50/10H10N50/85H10N50/01
Inventor 宋也男陈依君赵振杰孙卓邹锦堂
Owner EAST CHINA NORMAL UNIVERSITY
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products