Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Porous amorphous soft magnetic composite wave-absorbing material and preparation method thereof

A soft magnetic composite material and a composite material technology are applied to a porous iron-based amorphous soft magnetic alloy composite wave absorbing material. The field of preparation of the wave absorbing material can solve the problems of limited in-depth application, high dielectric constant of magnetic metal micropowder, and difficulty in Impedance matching and other issues, to achieve the effects of excellent soft magnetic performance, good thermal stability and low cost

Inactive Publication Date: 2019-04-02
JIYANG COLLEGE OF ZHEJIANG A & F UNIV
View PDF3 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the dielectric constant of magnetic metal micropowders is large, and it is difficult to achieve impedance matching, which limits its in-depth application in the field of microwave absorption.

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
  • Porous amorphous soft magnetic composite wave-absorbing material and preparation method thereof
  • Porous amorphous soft magnetic composite wave-absorbing material and preparation method thereof
  • Porous amorphous soft magnetic composite wave-absorbing material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] A preparation method of FeSiBPC / graphite composite wave-absorbing material, comprising the steps of:

[0041] Step 1: Fe 76 Si 7.6 B 9.5 P5C 1.9 Alloy atomic percent is converted into weight percent, Fe, Si and FeB, FeP and FeC alloy raw materials are weighed in proportion, and set aside.

[0042] Step 2: Put the mixture according to the above-mentioned composition ratio in the graphite crucible of the induction melting furnace, and first evacuate to 10 -3 Pa, then fill it with argon to a pressure of 500mbar, continue melting for 30 seconds after melting, then let the alloy cool down to room temperature with the crucible, repeat melting 3 times, and then cast it into a copper mold to obtain a uniform alloy ingot.

[0043] Step 3: Break the spindle obtained in Step 2 into small pieces, and place them in alcohol for ultrasonic cleaning.

[0044] Step 4: Put the small piece of alloy obtained in step 3 into a quartz glass tube with an open lower end, and then put it in...

Embodiment 2

[0050] A preparation method of FeSiBPC / graphite composite wave-absorbing material, comprising the steps of:

[0051] Step 1: Fe 76 Si 7.6 B 9.5 P 5 C 1.9 Alloy atomic percent is converted into weight percent, Fe, Si and FeB, FeP and FeC alloy raw materials are weighed in proportion, and set aside.

[0052] Step 2: Put the mixture according to the above-mentioned composition ratio in the graphite crucible of the induction melting furnace, and first evacuate to 10 -3 Pa, then fill it with argon to a pressure of 500mbar, continue melting for 30 seconds after melting, then let the alloy cool down to room temperature with the crucible, repeat melting 3 times, and then cast it into a copper mold to obtain a uniform alloy ingot.

[0053] Step 3: Break the spindle obtained in Step 2 into small pieces, and place them in alcohol for ultrasonic cleaning.

[0054] Step 4: Put the small piece of alloy obtained in step 3 into a quartz glass tube with an open lower end, and then put it...

Embodiment 3

[0061] A preparation method of FeSiBPC / graphite composite wave-absorbing material, comprising the steps of:

[0062] Step 1: Fe 76 Si 7.6 B 9.5 P 5 C 1.9 Alloy atomic percent is converted into weight percent, Fe, Si and FeB, FeP and FeC alloy raw materials are weighed in proportion, and set aside.

[0063] Step 2: Put the mixture according to the above-mentioned composition ratio in the graphite crucible of the induction melting furnace, and first evacuate to 10 -3 Pa, then fill it with argon to a pressure of 500mbar, continue melting for 30 seconds after melting, then let the alloy cool down to room temperature with the crucible, repeat melting 3 times, and then cast it into a copper mold to obtain a uniform alloy ingot.

[0064] Step 3: Break the spindle obtained in Step 2 into small pieces, and place them in alcohol for ultrasonic cleaning.

[0065] Step 4: Put the small piece of alloy obtained in step 3 into a quartz glass tube with an open lower end, and then put it...

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
thicknessaaaaaaaaaa
widthaaaaaaaaaa
particle diameteraaaaaaaaaa
Login to View More

Abstract

The invention provides a porous amorphous soft magnetic composite material with a strong microwave absorbing property and a preparation method thereof. The porous amorphous soft magnetic composite material with the strong microwave absorbing property is characterized in that the molecular short form of porous amorphous soft magnetic alloy as an absorbent is FeSiB<c>P<d>C<e>, wherein a is larger than 50 and less than 90, b is larger than 3 and less than 10, c is larger than 5 and less than 15, d is larger than 2 and less than 8, and e is larger than 1 and less than 5; and the porous amorphous soft magnetic composite material is further characterized in that paraffin wax, epoxy resin, thermoplastic materials or a mixture of the paraffin wax, the epoxy resin and the thermoplastic material is used as a binding agent, and the mass ratio of the binding agent to the absorbent is between 5% and 70%. Compared with the prior art, the porous amorphous soft magnetic composite material with the strong microwave absorbing property and the preparation method thereof have the advantages that a prepared product does not contain precious metals and has low cost; the amorphous alloy material used as the absorbent has strong amorphous forming ability, high saturation magnetization, excellent soft magnetic properties, high strength and good abrasion resistance, and shows strong microwave absorbing characteristics in a microwave band of 2 GHz to 18 GHz; and the absorbing frequency band is wide, the material thickness is thin, the thermal stability is good, the preparation process is simple, and industrial production is facilitated.

Description

technical field [0001] The invention relates to an amorphous alloy composite wave-absorbing material, in particular to a porous iron-based amorphous soft-magnetic alloy composite wave-absorbing material, and also relates to a preparation method of the wave-absorbing material. Background technique [0002] With the rapid development of electronic technology, the phenomenon of electromagnetic interference among the internal components of highly integrated electronic equipment has become increasingly prominent. Moreover, due to the increasing use of electromagnetic waves in various fields, electromagnetic pollution has become the fourth largest pollution after air pollution, water pollution and noise pollution. As a new type of environmental pollution, electromagnetic pollution has brought great threats and harm to communications, national defense and human health. [0003] At present, the control of electromagnetic pollution is mainly realized by two methods: electromagnetic ...

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
Patent Type & Authority Applications(China)
IPC IPC(8): C22C45/02B22F1/00B22F3/02H01F1/153
CPCH01F1/15308H01F1/1535C22C33/003C22C45/02B22F3/02B22F1/103B22F1/10
Inventor 孙怀君
Owner JIYANG COLLEGE OF ZHEJIANG A & F UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com