Ferrite-carbon nanotube composite wave absorption material and preparation method thereof

A carbon nanotube composite and composite wave-absorbing material technology, which is applied in the field of wave-absorbing materials, can solve the problems of unsatisfactory absorption frequency band extension, difficulty in matching electromagnetic parameters, and poor temperature stability, which is conducive to large-scale production and process Easy-to-control, easy-to-thickness effects

Inactive Publication Date: 2019-02-15
HENGDIAN GRP DMEGC MAGNETICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Ferrite has good microwave absorption performance, wide frequency band and cheap and easy to get, but its disadvantages are low absorption efficiency, high density, poor temperature stability, and in the microwave band, the dielectric constant of ferrite is solid The adjustable range of the inner part is not large, and the dielectric loss i...

Method used

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  • Ferrite-carbon nanotube composite wave absorption material and preparation method thereof
  • Ferrite-carbon nanotube composite wave absorption material and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0038] Such as figure 1 As shown, the ferrite-carbon nanotube composite absorbing material has a double-layer structure of carbon nanotube layer and ferrite layer. By adjusting the layer number, thickness, formula and process of the carbon nanotube layer and the ferrite layer in the composite absorbing material, the absorbing performance of the material can be regulated.

[0039] (1) The composition and weight percentage of the ferrite layer are:

[0040] Polymer binder: 10%

[0041] Nickel zinc ferrite powder: 88%

[0042] Auxiliary: 2%

[0043] The polymer binder is polyurethane, which is required to meet the requirements of the wave-absorbing material casting process.

[0044] The ferrite is NiZnFe 2 o 4 , Nickel-zinc ferrite is spherical with a diameter of 300-1500nm.

[0045] The auxiliary agent includes a dispersant, a polyurethane curing agent and a curing catalyst, and the mass ratio of the two is 1:8:1.

[0046] The thickness of the nickel-zinc ferrite single la...

Embodiment 2

[0065] Such as figure 1 As shown, the ferrite-carbon nanotube composite absorbing material has a double-layer structure of carbon nanotube layer and ferrite layer. By adjusting the layer number, thickness, formula and process of the carbon nanotube layer and the ferrite layer in the composite absorbing material, the absorbing performance of the material can be regulated.

[0066] (1) The composition and weight percentage of the ferrite layer are:

[0067] Polymer binder: 8%

[0068] Manganese zinc ferrite powder: 90%

[0069] Auxiliary: 2%

[0070] The polymer binder is ethyl cellulose, which is required to meet the requirements of the wave-absorbing material casting process.

[0071] The ferrite is MnZnFe 2 o 4 , MnZn ferrite is spherical with a diameter of 500-2000nm.

[0072] The auxiliary agent includes a dispersant, a curing agent and a curing catalyst, and the mass ratio of the two is 2:7:1.

[0073] The single layer thickness of the manganese zinc ferrite is 0.1...

Embodiment 3

[0089] Such as figure 1 As shown, the ferrite-carbon nanotube composite absorbing material has a double-layer structure of carbon nanotube layer and ferrite layer. By adjusting the layer number, thickness, formula and process of the carbon nanotube layer and the ferrite layer in the composite absorbing material, the absorbing performance of the material can be regulated.

[0090] (1) The composition and weight percentage of the ferrite layer are:

[0091] Polymer binder: 17%

[0092] Barium ferrite magnetic powder: 80%

[0093] Auxiliary: 3%

[0094] The polymer binder is polyvinyl acetal, which is required to meet the requirements of the wave-absorbing material casting process.

[0095] The ferrite is BaFe 12 o 19 , Barium ferrite is spherical with a diameter of 800-3000nm.

[0096] The auxiliary agent includes a dispersant, a curing agent and a curing catalyst, and the mass ratio of the two is 1:8:1.

[0097] The thickness of the barium ferrite single layer is 0.10mm...

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Abstract

The invention discloses a ferrite-carbon nanotube composite wave absorption material and a preparation method thereof. The ferrite-carbon nanotube composite wave absorption material comprises a carbonnanotube and a ferrite layer, wherein the ferrite layer comprises 5-17% of macromolecule binding agent, 80-92% of ferrite and additive smaller than or equal to 3% by calculation according to percentby weight, and the carbon nanotube layer comprises 8-20% of macromolecule binding agent, 75-87% of carbon nanotube and an additive smaller than or equal to 5%. By combining a high-absorption magnetic-loss ferrite wave absorption material and light-weight dielectric loss-type carbon nanotube wave absorption material, the high-temperature property, the density, the stability, the processing performance and the application performance of the ferrite are improved; and by changing relative content of each constituent of the composite material, a formula and a preparation process, the electromagnetic parameter of the composite material is controlled, the wave absorption frequency band of a compound is expanded, and the absorption efficiency of the compound is improved.

Description

technical field [0001] The invention relates to the field of wave-absorbing materials, in particular to a ferrite-carbon nanotube composite wave-absorbing material and a preparation method thereof. Background technique [0002] At present, with the rapid development of electronic technology, electronic, electrical equipment or other information systems have been more and more widely used in various fields of people's daily production and life. The wide application and development of electronic equipment, while bringing great convenience to people's lives, its electromagnetic radiation has also had a great impact on human health and the environment on which we live. With the development of electronic products in the direction of high frequency, high integration and miniaturization, the electromagnetic compatibility and electromagnetic interference problems of electronic products are becoming more and more prominent, so higher requirements are put forward for the electromagnet...

Claims

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Application Information

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IPC IPC(8): H05K9/00C04B35/634C04B35/626C04B35/622C04B35/26
CPCH05K9/0088C04B35/2658C04B35/2666C04B35/622C04B35/62605C04B35/6342C04B35/63456C04B2235/3272C04B2235/5288C04B2235/6025C04B2235/77H05K9/009
Inventor 郝斌刘立东蒋劭培
Owner HENGDIAN GRP DMEGC MAGNETICS CO LTD
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