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A solid nano-dispersion absorbing material

A nano-dispersion and wave-absorbing material technology, which is applied in the field of wave-absorbing materials, can solve problems such as large filling ratio, high density, and narrow absorption frequency band, and achieve the effect of small filling amount, good effect, and wide wave-absorbing frequency

Active Publication Date: 2021-10-29
SHAANXI NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the problems of narrow absorption frequency band, high density, and large filling ratio of existing wave-absorbing materials, and provide a kind of microwave absorbing material prepared by spray drying method, which has excellent characteristics such as wide absorption frequency band, low density, and small filling ratio. Method for Solid Nanodispersion Absorbing Materials

Method used

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  • A solid nano-dispersion absorbing material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Add 20g of gum arabic to 200g of water, stir to dissolve it, then add 5g of magnetosomes and 5g of carbon fiber to it, and use a high-speed shearing machine with a power of 1200W and a pressure of 0.8MPa to make it into a suspension state. The resulting suspension was homogenized by a high-pressure homogenizer at a pressure of 1000 bar, and then spray-dried. The air inlet temperature of the spray-drying was 180° C., and the feed rate was 60 kg / h to obtain a solid nano-dispersion wave-absorbing material.

[0023] The absorbing material is dispersed in paraffin, wherein the mass fraction of the absorbing material is 30%, and the absorbing material / paraffin mixture is pressed into a ring with an outer diameter of 7 mm, an inner diameter of 3 mm, and a thickness of 3 mm. Using a vector network analyzer to test the dielectric constant and permeability of the absorbing material, the lowest reflection loss (RL min ) at 3mm is -55.2dB, when the thickness is 3mm, the frequency b...

Embodiment 2

[0025] Add 20g of gum arabic to 250g of water, stir to dissolve it, then add 4g of magnetosomes and 4g of carbon fibers to it, and use a high-speed shear to make it into a suspension state at a power of 1200W and a pressure of 0.8MPa. The resulting suspension was homogenized by a high-pressure homogenizer at a pressure of 1000 bar, and then spray-dried. The air inlet temperature of the spray-drying was 180° C., and the feed rate was 60 kg / h to obtain a solid nano-dispersion wave-absorbing material.

[0026] The absorbing material is dispersed in paraffin, wherein the mass fraction of the absorbing material is 30%, and the absorbing material / paraffin mixture is pressed into a ring with an outer diameter of 7 mm, an inner diameter of 3 mm, and a thickness of 3 mm. Using a vector network analyzer to test the dielectric constant and permeability of the absorbing material, the lowest reflection loss (RL min ) is -35.2dB when the thickness is 3mm, and the frequency bandwidth in whic...

Embodiment 3

[0028] Add 20g of gum arabic to 200g of water, stir to dissolve it, then add 4g of magnetosomes and 4g of carbon fibers to it, and use a high-speed shear to make it into a suspension state at a power of 1200W and a pressure of 0.8MPa. The resulting suspension was homogenized by a high-pressure homogenizer at a pressure of 1000 bar, and then spray-dried. The air inlet temperature of the spray-drying was 180° C., and the feed rate was 60 kg / h to obtain a solid nano-dispersion wave-absorbing material.

[0029] The absorbing material is dispersed in paraffin, wherein the mass fraction of the absorbing material is 30%, and the absorbing material / paraffin mixture is pressed into a ring with an outer diameter of 7 mm, an inner diameter of 3 mm, and a thickness of 3 mm. Using a vector network analyzer to test the dielectric constant and permeability of the absorbing material, the lowest reflection loss (RL min ) is -39.5dB when the thickness is 3mm, and the frequency bandwidth in whic...

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Abstract

The invention discloses a solid nano-dispersion wave-absorbing material, which is a single magnetic domain Fe obtained by microbial fermentation. 3 o 4 Nano crystals - Magnetosomes are absorbents, compounded with carbon materials at the same time, and prepared into bio-nano wave-absorbing materials by spray-drying technology. The preparation method of the wave-absorbing material of the present invention is simple, the filling amount of magnetosomes is small, the amount of powder produced is large, the production cost is low, and it is easy for large-scale industrial production, and the obtained wave-absorbing material has uniform particles, strong stability, and excellent absorption High wave performance, wide absorbing frequency, better effect than current absorbing materials, and high practical application value.

Description

technical field [0001] The invention belongs to the technical field of wave-absorbing materials, and in particular relates to a solid nano-dispersion wave-absorbing material. Background technique [0002] With the development of electromagnetic stealth technology in the military field, and the increasingly serious problems of electromagnetic pollution and electromagnetic interference, absorbing materials have gradually become a research hotspot in the field of functional materials. Absorbing materials refer to a class of materials that can absorb or greatly weaken the electromagnetic wave energy projected onto its surface, thereby reducing the interference of electromagnetic waves, and convert electromagnetic energy into other forms of energy for consumption. In modern warfare, in the face of advanced radar detection technology and strong electromagnetic interference technology of electronic warfare, the demand for improving the stealth performance and anti-electromagnetic i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L5/00C08L75/04C08L25/06C08L33/02C08K3/22C08K7/06C09K3/00
CPCC08K3/22C08K7/06C08K2003/2275C08K2201/01C09K3/00C08L5/00C08L75/04C08L25/06C08L33/02
Inventor 孟永宏张煜瞳谢道涛强珊徐俊杰田杰生李颖
Owner SHAANXI NORMAL UNIV
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