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Tapered wave-absorbing material and preparation method thereof

A technology of wave absorbing material and cone, applied in the field of cone wave absorbing material and its preparation, can solve problems such as poor wave absorbing performance, and achieve the effects of good wave absorbing performance, good broadband wave absorbing performance and good wave absorbing effect

Pending Publication Date: 2018-05-29
LUOYANG INST OF CUTTING EDGE TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the problems in the related art, the present invention proposes a method for preparing conical wave-absorbing materials to solve the problem of poor wave-absorbing performance of wave-absorbing materials in the prior art

Method used

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  • Tapered wave-absorbing material and preparation method thereof

Examples

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Effect test

Embodiment 1

[0025] In parts by mass, 100 parts of polyurethane rubber, 2 parts of stearic acid, 1 part of antioxidant N-phenyl-α-aniline, 2 parts of dicumyl peroxide, 3 parts of plasticizer o-phenyl Di-n-octyl diformate and 60 parts of carbonyl iron powder are mixed and banburyed evenly in a banbury mixer at a temperature of 65° C. to obtain a good polyurethane rubber of banbury;

[0026] In the flat vulcanizer, press-molded polyurethane rubber in a pyramid-shaped mold. During the press-forming process, vulcanize at a temperature of 160°C and the vulcanization time is 25 minutes, so as to obtain a conical wave-absorbing material. . Wherein, the pyramid-shaped mold includes a plurality of adjacent and repeatedly arranged quadrangular pyramid-shaped holes, the size of the pyramid-shaped mold is 330mm×330mm, and the height of the pyramid-shaped mold after removing the conical absorbing material is 22mm (including base).

Embodiment 2

[0028] With 100 parts of polyurethane rubber, 0.3 parts of stearic acid, 0.5 parts of antioxidant N-phenyl-β-naphthylamine, 2 parts of dicumyl peroxide, 5 parts of benzene polyester plasticizers and 70 parts of carbonyl iron powder are mixed and banburyed uniformly in an internal mixer at a temperature of 85° C. according to parts by mass to obtain a good polyurethane rubber of banburying;

[0029] In the plate vulcanizer, the polyurethane rubber that has been banburyed is pressed into a pyramid-shaped mold. During the press-forming process, it is vulcanized at a temperature of 170°C and the vulcanization time is 30 minutes, so as to obtain a conical wave-absorbing material. . Wherein, the pyramid-shaped mold includes a plurality of adjacent and repeatedly arranged quadrangular pyramid-shaped holes, the size of the pyramid-shaped mold is 330mm × 330mm, and the height of the pyramid-shaped mold after removing the conical absorbing material is 22mm (including base).

Embodiment 3

[0031] In parts by mass, 100 parts of polyurethane rubber, 3 parts of stearic acid, 1.5 parts of antioxidant N-phenyl-N'-cyclohexyl p-phenylenediamine, 1.5 parts of dicumyl peroxide, 2 parts The plasticizer diisobutyl phthalate and 50 parts of carbonyl iron powder are mixed and banburyed evenly in a banbury mixer at a temperature of 70° C. to obtain a good polyurethane rubber of banbury;

[0032] In the flat vulcanizer, press-molded polyurethane rubber in a pyramid-shaped mold. During the press-forming process, vulcanize at a temperature of 165°C and the vulcanization time is 38 minutes, so as to obtain a conical wave-absorbing material. . Wherein, the pyramid-shaped mold includes a plurality of adjacent and repeatedly arranged quadrangular pyramid-shaped holes, the size of the pyramid-shaped mold is 330mm × 330mm, and the height of the pyramid-shaped mold after removing the conical absorbing material is 22mm (including base).

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Abstract

The invention discloses a tapered wave-absorbing material and a preparation method thereof. The method comprises the following steps: mixing polyurethane rubber, stearic acid, an antioxidant, dicumylperoxide, a plasticizer and carbonyl iron powder in proportion for blending evenly to obtain blended polyurethane rubber; and pressing the blended polyurethane rubber in a pyramidal mold to form the tapered wave-absorbing material. The prepared tapered wave-absorbing material includes a plurality of adjacent and repetitively-arranged square-pyramid pieces and is added with the carbonyl iron powderas a wave absorber, so that the prepared tapered wave-absorbing material has a good wide-band wave absorbing performance and can realize a good wave absorbing performance in a wide-band range from microwave to millimeter wave, and by multiple reflections between wedges of the plurality of square-pyramid pieces and conversion of energy of electromagnetic waves into thermal energy by use of the wave absorber for consumption, the tapered wave-absorbing material has a good absorbing effect at specific wavelength bands. The tapered wave-absorbing material can be applied to many fields such as aerospace, high-speed locomotives, warships, radar antennas, and electronics.

Description

technical field [0001] The invention relates to the field of composite materials, in particular to a tapered wave-absorbing material and a preparation method thereof. Background technique [0002] Absorbing material refers to a class of materials that can absorb electromagnetic wave energy projected onto its surface. In engineering applications, in addition to requiring a high absorption rate of electromagnetic waves in a wide frequency band, the absorbing material is also required to have properties such as light weight, temperature resistance, moisture resistance, and corrosion resistance. [0003] At present, patch materials generally have the disadvantage of high surface density, and the temperature resistance is generally lower than 100°C, which cannot meet the mechanical properties and other requirements of aircraft and other equipment. With the development of microporous wave-absorbing materials with an array structure surface, some materials are treated with micropo...

Claims

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Application Information

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IPC IPC(8): C08L75/04C08K13/02C08K5/09C08K5/14C08K3/18C09K3/00B29C35/02
CPCB29C35/02C08K3/18C08K5/09C08K5/14C08K13/02C08K2201/014C09K3/00C08L75/04
Inventor 不公告发明人
Owner LUOYANG INST OF CUTTING EDGE TECH
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