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FeSiAl flaky wave-absorbing material and preparation method thereof

A wave-absorbing material and sheet-like technology, applied in the field of FeSiAl sheet-like wave-absorbing material and its preparation, can solve the problems of weak electromagnetic shielding ability, complicated preparation process, low magnetic permeability, etc., and achieve strong electromagnetic shielding ability and good absorption. Wave effect, high permeability effect

Active Publication Date: 2021-01-22
绵阳西磁科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is: in order to solve the problems of low magnetic permeability, weak electromagnetic shielding ability, high price and complicated preparation process in the existing electromagnetic shielding absorbing materials, the present invention provides a FeSiAl sheet absorbing material and its preparation method

Method used

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  • FeSiAl flaky wave-absorbing material and preparation method thereof
  • FeSiAl flaky wave-absorbing material and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0028] A FeSiAl sheet absorbing material

[0029] The FeSiAl sheet-shaped wave-absorbing material is made of FeSiAl wave-absorbing powder and colloid with a mass ratio of 10:0.45. The mass fractions of Fe, Si, and Al in the FeSiAl wave-absorbing powder are Fe9.4%, Si6.1%, Al84 .5%; Among them, the colloid is water-based polyurethane.

[0030] The preparation steps are as follows:

[0031] Step 1. Preparation of FeSiAl alloy powder: After the mass fraction of Fe, Si, and Al is smelted, centrifuged, and ball milled, FeSiAl alloy powder with a particle size of 100 μm is obtained;

[0032] Step 2. FeSiAl flake powder preparation: FeSiAl alloy powder obtained in step 1 was wet ball milled at a rate of 800 rpm for 120 min in a high-energy ball mill to obtain scale-like FeSiAl flake powder with a thickness of 0.5 μm;

[0033] Step 3. Preparation of FeSiAl microwave-absorbing powder: The FeSiAl flake powder obtained in step 2 is first dried at a temperature of 100°C for 3 hours, and...

Embodiment 2

[0036] A FeSiAl sheet absorbing material

[0037] The FeSiAl sheet-shaped wave-absorbing material is made of FeSiAl wave-absorbing powder and colloid with a mass ratio of 10:0.85. The mass fractions of Fe, Si, and Al in the FeSiAl wave-absorbing powder are Fe10.0%, Si5.5%, Al84 .5%; Among them, the colloid is EPDM rubber.

[0038] The preparation steps are as follows:

[0039] Step 1. Preparation of FeSiAl alloy powder: After the mass fractions of Fe, Si, and Al are smelted, centrifuged, and ball milled, FeSiAl alloy powder with a particle size of 200 μm is obtained;

[0040] Step 2. FeSiAl flake powder preparation: FeSiAl alloy powder obtained in step 1 was wet ball milled at a rate of 1200 rpm for 60 min in a high-energy ball mill to obtain scale-like FeSiAl flake powder with a thickness of 1.0 μm;

[0041] Step 3. Preparation of FeSiAl microwave-absorbing powder: The FeSiAl flake powder obtained in step 2 is first dried at a temperature of 150°C for 2 hours, and then heat...

Embodiment 3

[0044] A FeSiAl sheet absorbing material

[0045] The FeSiAl sheet-shaped wave-absorbing material is made of FeSiAl wave-absorbing powder and colloid with a mass ratio of 10:0.65; the mass fractions of Fe, Si, and Al in the FeSiAl wave-absorbing powder are Fe9.7%, Si5.8%, Al84 .5%; Among them, the colloid is polyvinyl alcohol.

[0046] The preparation steps are as follows:

[0047] Step 1. Preparation of FeSiAl alloy powder: after the mass fractions of Fe, Si, and Al are smelted, centrifuged, and ball milled, FeSiAl alloy powder with a particle size of 150 μm is obtained;

[0048]Step 2. FeSiAl flake powder preparation: FeSiAl alloy powder obtained in step 1 was wet ball milled at a rate of 1000 rpm for 90 minutes in a high-energy ball mill to obtain scale-like FeSiAl flake powder with a thickness of 0.8 μm;

[0049] Step 3. Preparation of FeSiAl microwave-absorbing powder: The FeSiAl flake powder obtained in step 2 was first dried at 125°C for 2.5 hours, and then heated at ...

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Abstract

The invention discloses a FeSiAl sheet-shaped wave-absorbing material and a preparation method thereof, relates to the technical field of electromagnetic shielding wave-absorbing materials, and aims to solve the technical problems of low magnetic conductivity, weak electromagnetic shielding capability, high price and complex preparation process of an existing electromagnetic shielding wave-absorbing material. The FeSiAl flaky wave-absorbing material is prepared from FeSiAl wave-absorbing powder and colloid in a mass ratio of 10: 0.45-0.85. The mass fractions of Fe and Si in the FeSiAl wave-absorbing powder is 9.4%-10.0% and 5.5%-6.1% respectively, and the balance is Al. The FeSiAl flaky wave-absorbing material has the advantages of being high in magnetic conductivity and high in electromagnetic shielding capacity.

Description

technical field [0001] The invention relates to the technical field of electromagnetic shielding wave-absorbing materials, in particular to a FeSiAl sheet-shaped wave-absorbing material and a preparation method thereof. Background technique [0002] Absorbing material refers to the ability to absorb the electromagnetic wave energy projected on its surface, and convert the electromagnetic wave energy into heat energy or other forms of energy through the dielectric loss of the material. become. An ideal absorbing material should have the characteristics of wide absorption frequency, light weight, thin thickness, good physical and mechanical properties, and easy use. Its chemical composition and structure should make the wavelength of electromagnetic waves in it not change due to the change of incident frequency. [0003] At present, there are many researches and applications on ferrite absorbing materials, metal micropowder absorbing materials, nano-scale absorbing materials,...

Claims

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Application Information

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IPC IPC(8): C04B26/16C04B26/10C04B26/04C04B26/14
CPCC04B26/16C04B26/10C04B26/04C04B26/14C04B2111/00258C04B14/04C04B14/34
Inventor 周永川王玄哲胡勇
Owner 绵阳西磁科技有限公司
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