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X-band resistive film-type high-temperature-resistant metamaterial-containing wave absorber

A technology of metamaterials and wave absorbers, applied in electrical components, antennas, etc., can solve the problems of narrow frequency band, insufficient absorption capacity, increase the weight of weapons and equipment, etc., and achieve the effect of strong wave absorption capacity

Inactive Publication Date: 2017-09-08
PEOPLES LIBERATION ARMY ORDNANCE ENG COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the commonly used high-temperature wave-absorbing materials such as silicon carbide SiC have insufficient absorption capacity and narrow frequency band. Especially in the low-frequency band, only by increasing the thickness of the coating can the wave-absorbing effect be achieved, which will inevitably increase the weight of weapons and equipment and affect its mobility and performance. Combat

Method used

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  • X-band resistive film-type high-temperature-resistant metamaterial-containing wave absorber
  • X-band resistive film-type high-temperature-resistant metamaterial-containing wave absorber
  • X-band resistive film-type high-temperature-resistant metamaterial-containing wave absorber

Examples

Experimental program
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Effect test

example 1

[0018] Weigh 346.4g of lanthanum nitrate, 42.326g of strontium nitrate, 357.9g of 50% manganese nitrate solution, 230.57g of citric acid, and 297.936g of ethylene glycol, and set aside. La was obtained by sol-gel method combined with heat treatment x Sr 1-x MnO 3 Black fluffy block. Put the black fluffy block into an agate mortar and grind it thoroughly to obtain strontium lanthanum manganate conductive ceramic powder. Put the black fluffy block into an agate mortar and grind it thoroughly to obtain strontium lanthanum manganate conductive ceramic powder. Take 97g of terpineol and 3g of ethyl cellulose, fully heat and stir at 100°C for 7h, so that the ethyl cellulose is completely dissolved in terpineol. The above-mentioned organic carrier and strontium lanthanum manganate ceramic powder were weighed according to the mass ratio of 7:3, and placed in an agate mortar, fully ground and stirred; put the agate mortar into an ultrasonic disperser, so that the powder and organic ...

example 2

[0020] Weigh lanthanum nitrate 303.1g, strontium nitrate 84.652g, 50% manganese nitrate solution 357.9g, citric acid 230.57g, ethylene glycol 297.936g, set aside. La was obtained by sol-gel method combined with heat treatment x Sr 1-x MnO 3 Black fluffy block. Put the black fluffy block into an agate mortar and grind it thoroughly to obtain strontium lanthanum manganate conductive ceramic powder. Put the black fluffy block into an agate mortar and grind it thoroughly to obtain strontium lanthanum manganate conductive ceramic powder. Take 97g of terpineol and 3g of ethyl cellulose, fully heat and stir at 100°C for 7h, so that the ethyl cellulose is completely dissolved in terpineol. The above-mentioned organic carrier and strontium lanthanum manganate ceramic powder were weighed according to the mass ratio of 7:3, and placed in an agate mortar, fully ground and stirred; put the agate mortar into an ultrasonic disperser, so that the powder and organic The carrier is mixed e...

example 3

[0022] Weigh lanthanum nitrate 259.8g, strontium nitrate 63.489g, 50% manganese nitrate solution 357.9g, citric acid 230.57g, ethylene glycol 297.936g, set aside. La was obtained by sol-gel method combined with heat treatment x Sr 1-x MnO 3 Black fluffy block. Put the black fluffy block into an agate mortar and grind it thoroughly to obtain strontium lanthanum manganate conductive ceramic powder. Put the black fluffy block into an agate mortar and grind it thoroughly to obtain strontium lanthanum manganate conductive ceramic powder. Take 97g of terpineol and 3g of ethyl cellulose, fully heat and stir at 100°C for 7h, so that the ethyl cellulose is completely dissolved in terpineol. The above-mentioned organic carrier and strontium lanthanum manganate ceramic powder were weighed according to the mass ratio of 7:3, and placed in an agate mortar, fully ground and stirred; put the agate mortar into an ultrasonic disperser, so that the powder and organic The carrier is mixed e...

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Abstract

The invention discloses an X-band metamaterial-containing wave absorber. The X-band metamaterial-containing wave absorber is prepared according to the following steps: with nitrate and citric acid as main raw materials, by a sol-gel method and in combination with subsequent heat treatment, preparing strontium lanthanum manganate ceramic powder, and mixing the ceramic powder with an organic solvent consisting of terpineol and ethyl cellulose to obtain a slurry, and printing a ceramic substrate with the slurry by a screen printing method to form periodically-arranged resistive film patterns, so that the metamaterial-containing wave absorber adopting a two-layer structure with an upper layer and a lower layer is obtained, and organic combination of a strontium lanthanum manganite conductive ceramic material and a metamaterial is achieved. A preparation method of the X-band metamaterial-containing wave absorber has the advantages of low cost, simple instrument and high controllability. According to the metamaterial-containing wave absorber prepared by the preparation method provided by the invention, controllability and adjustability of electromagnetic parameters can be achieved through change of components of the ceramic powder and change of structural parameters of the ceramic substrate, and optimization on the wave-absorbing performance can be achieved through design of a resistive film pattern template, so that the wave-absorbing performance of the wave absorber exists in the whole X band of 8-12 GHz, and the maximum wave-absorbing intensity of the wave absorber and the frequency position where the maximum wave-absorbing intensity appears can be further optimized according to application needs.

Description

[0001] Technical field [0002] The invention relates to an X-band high-temperature metamaterial absorber, which belongs to the technical field of electromagnetic functional materials. Background technique [0003] With the continuous use of X-band detection radars with longer detection distances and higher resolutions in recent years, the stealth problem of weapons and equipment is facing severe challenges, and the radar stealth of weapons and equipment components working under high temperature is an urgent problem to be solved For example, certain special parts of weapons and equipment such as fighter jets and cruise missiles, such as nose cones, flanges, engine inlets and tail nozzles, need to withstand the impact of high temperature and high-speed thermal airflow, and their local operating temperatures will reach 700 ° C or even Above 1000°C. At present, the commonly used high-temperature wave-absorbing materials such as silicon carbide SiC have insufficient absorption ca...

Claims

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Application Information

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IPC IPC(8): C04B41/87H01Q17/00
CPCC04B41/009C04B41/5028C04B41/87H01Q17/00C04B35/10
Inventor 许宝才王建江侯永伸李宝峰
Owner PEOPLES LIBERATION ARMY ORDNANCE ENG COLLEGE
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