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Preparation method of S-waveband wave absorbing material

A wave-absorbing material and wave-band technology, applied in the field of S-band wave-absorbing material preparation, can solve the problems of low oxidation resistance and acid and alkali corrosion resistance, reduced wave absorption performance, small matching thickness, etc., and achieve excellent wave absorption performance, Low cost and easy availability of raw materials

Active Publication Date: 2016-02-03
YANGZHOUSRKLE INDAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Carbonyl iron powder is a commonly used traditional magnetic absorbent. Although it has high density, low oxidation resistance and acid and alkali corrosion resistance, its matching thickness is very small.
[0004] Although the electrical conductivity of carbonyl iron powder is lower than other magnetic metals, compared with its own magnetic permeability, the electrical conductivity is still higher. The skin effect caused by the higher electrical conductivity will lead to a decrease in magnetic permeability, so that the wave-absorbing performance decline

Method used

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  • Preparation method of S-waveband wave absorbing material
  • Preparation method of S-waveband wave absorbing material
  • Preparation method of S-waveband wave absorbing material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] A preparation method of an S-band wave-absorbing material, comprising the steps of:

[0049] (a) Take 40g of carbonyl iron powder raw material and preheat at 100°C for 2 hours under the protection of argon;

[0050] (b) Preheated carbonyl iron powder, 0.5ml KH-560 coupling agent, 100ml absolute ethanol, 400g stainless steel balls, the stainless steel balls are composed of three types of spherical balls with diameters of 16mm, 6mm, and 3mm, large, medium, and small, The mass ratio of large, medium and small three kinds of spherical balls is large: medium: small = 10:40:50, put into the ball mill tank and then conduct ball milling, the horizontal planetary ball mill is milled at a speed of 500r / min for 8 hours;

[0051] (c) Take out the ball-milled slurry, heat at 40° C. for 3 hours, and dry to obtain the S-band wave-absorbing material of the present invention.

[0052] The S-band wave-absorbing material and paraffin prepared in this example are in the ratio of 85:15 in ...

Embodiment 2

[0054] A preparation method of an S-band wave-absorbing material, comprising the steps of:

[0055] (a) Take 45g of carbonyl iron powder raw material and preheat at 150°C for 1.5 hours under the protection of argon;

[0056](b) Take the preheated carbonyl iron powder, 0.5ml KH-560 coupling agent, 125ml absolute ethanol, and 405g spherical stainless steel balls. The stainless steel balls are composed of large, medium, and small balls with diameters of 16mm, 6mm, and 3mm. , the mass ratio of large, medium and small spherical balls is large: medium: small = 5:45:50, put into the ball mill jar and seal it and then carry out ball milling. The horizontal planetary ball mill will mill at a speed of 450r / min for 9 hours;

[0057] (c) Take out the ball-milled slurry, heat it at 50°C for 2.5 hours and dry it to obtain the S-band wave-absorbing material of the present invention.

[0058] The S-band wave-absorbing material and paraffin prepared in this example are in the ratio of 85:15 i...

Embodiment 3

[0060] A preparation method of an S-band wave-absorbing material, comprising the steps of:

[0061] (a) Take 50g of carbonyl iron powder raw material and preheat at 200°C for 2 hours under the protection of argon;

[0062] (b) Take the preheated carbonyl iron powder, 0.5ml KH-560 coupling agent, 150ml absolute ethanol, and 400g spherical stainless steel balls. The stainless steel balls are composed of large, medium and small balls with diameters of 16mm, 6mm, and 3mm. , the mass ratio of large, medium and small spherical balls is large: medium: small = 7:43:50, put into the ball mill tank and seal it and then carry out ball milling. The horizontal planetary ball mill mills at a speed of 400r / min for 10 hours;

[0063] (c) Take out the ball-milled slurry, heat it at 60°C for 2 hours and dry it to obtain the S-band wave-absorbing material of the present invention.

[0064] The S-band wave-absorbing material and paraffin prepared in this example are in the ratio of 85:15 in mass...

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Abstract

The invention aims at proving a preparation method of an S-waveband wave absorbing material. The method includes the following steps that carbonyl iron powder is preheated under argon gas protection; the preheated carbonyl iron powder, a coupling agent KH-560, anhydrous ethanol and stainless steel balls are placed in a ball milling tank and are subjected to ball milling in a horizontal planetary ball mill; and sizing agents where ball milling is performed are heated for 2-3 h at the temperature of 40-60 DEG C and then are dried, and then the S-waveband wave absorbing material can be prepared. The S-waveband wave absorbing material has good wave absorbing performance; the S waveband of the S-waveband wave absorbing material at the frequency of 2.2-2.8 GHz is calculated according to measured electromagnetic parameters of the wave absorbing material, and when the thickness is 2.5 mm or lower, reflection loss (RL) is smaller than -15 dB. Raw materials of the wave absorbing material are easy to obtain, the technology is simple, cost is low, and the wave absorbing material is suitable for large-scale production.

Description

technical field [0001] The invention belongs to the field of magnetic wave-absorbing materials, and in particular relates to a preparation method of an S-band wave-absorbing material. Background technique [0002] In recent years, in the military field, absorbing materials have played an important role in improving electromagnetic compatibility and preventing electromagnetic radiation. The radar absorbing material absorbs and attenuates the incident electromagnetic wave, weakens the intensity of the reflected echo, and can reduce the scattering surface of the target radar. Therefore, the application of wave-absorbing materials to absorb electromagnetic waves in a certain frequency range to reduce the radar scattering surface is the most valuable stealth technology. [0003] Magnetic metal micropowder absorbing materials have the advantages of high Curie temperature, good temperature stability, the highest magnetization among magnetic materials, large microwave permeability,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/30
Inventor 谢国治王锰刚陈文俊陈将伟沈杨周倜孙康
Owner YANGZHOUSRKLE INDAL
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