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Wave-absorbing honeycomb with pyramid-like structures and preparation method of wave-absorbing honeycomb

A pyramid and honeycomb technology, which is applied in chemical instruments and methods, lamination devices, lamination auxiliary operations, etc., can solve the problem that the wave absorbing honeycomb pyramid cannot be used as a structural load-bearing member, etc., and achieves easy process control and stable performance. , the effect of high absorbing performance

Active Publication Date: 2021-03-12
AEROSPACE INST OF ADVANCED MATERIALS & PROCESSING TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The material used is a wave-absorbing honeycomb sheet obtained after impregnation. However, its disadvantage is that four pieces of wave-absorbing honeycomb sheets are bonded to form a single pyramid, and the wave-absorbing pyramid in the final stroke is formed by a square pyramid. array, the absorbing honeycomb pyramid cannot be used as a structural load-bearing member

Method used

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  • Wave-absorbing honeycomb with pyramid-like structures and preparation method of wave-absorbing honeycomb
  • Wave-absorbing honeycomb with pyramid-like structures and preparation method of wave-absorbing honeycomb
  • Wave-absorbing honeycomb with pyramid-like structures and preparation method of wave-absorbing honeycomb

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057] Step 1: Select a density of 48kg / m 3 , a honeycomb block with a cell size of 3.2mm, which is sliced ​​into a honeycomb sheet of 300mm×300mm×5mm by a cutting machine.

[0058] Step 2: Take a certain quality of conductive carbon black, water-soluble honeycomb modified epoxy resin, curing agent and deionized water, wherein the total mass of conductive carbon black and resin (containing curing agent) is 500g, and conductive carbon black and resin The weight ratio (including curing agent) is 1:1, and the plasma water is 5000g. Put the conductive carbon black, resin, curing agent and a small amount of plasma water into the container for high-speed mechanical stirring for 10 minutes, then gradually add the remaining plasma water into the container, and get the absorbent slurry after stirring evenly. After the foam on the surface of the slurry is eliminated, use the Tu-4 cup to monitor the viscosity of the absorbent slurry, and the viscosity value is 12-13s. Pour the configur...

Embodiment 2

[0065] Choose a density of 48kg / m 3 A honeycomb block with a cell size of 4.8 mm is used as the base material. A total of 8 honeycomb pyramids were impregnated and dried, and the rest were the same as in Example 1 to obtain a microwave-absorbing honeycomb with a pyramid-like wave-absorbing structure. The reflectivity test curve of the absorbing honeycomb is as follows Figure 5 shown.

Embodiment 3

[0067] Step 1: Select a density of 80kg / m 3 , a honeycomb block with a cell size of 3.2mm, which is sliced ​​into a honeycomb sheet of 500mm×500mm×10mm by a cutting machine.

[0068] Step 2: Take a certain quality of conductive carbon black, water-soluble honeycomb modified epoxy resin, curing agent and deionized water, wherein the total mass of conductive carbon black and resin (containing curing agent) is 1200g, and conductive carbon black and resin The weight ratio (including curing agent) is 1:3, and the plasma water is 6000g. Put the conductive carbon black, resin, curing agent and a small amount of plasma water into the container for high-speed mechanical stirring for 10 minutes, then gradually add the remaining plasma water into the container, and get the absorbent slurry after stirring evenly. After the foam on the surface of the slurry is eliminated, use the Tu-4 cup to monitor the viscosity of the absorbent slurry, and the viscosity value is 10-11s. Pour the config...

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Abstract

The invention discloses a wave-absorbing honeycomb with pyramid-like structures and a preparation method of the wave-absorbing honeycomb, and belongs to the technical field of microwave absorbing materials. Each pyramid-like wave-absorbing structure is formed by stacking and bonding a plurality of wave-absorbing honeycomb sheets with different sizes and electromagnetic characteristics from large to small in sequence from bottom to top, and the middle area of each pyramid-like wave-absorbing structure is filled with a non-wave-absorbing honeycomb sheet. And the pyramid-like wave-absorbing structures and the non-wave-absorbing honeycomb sheets form a flat-plate-shaped integral appearance together. The wave-absorbing honeycombs have excellent wave-absorbing performance and certain structuralbearing capacity. The preparation method is stable and easy to control, and the wave-absorbing honeycombs with excellent wave-absorbing performance can be prepared.

Description

technical field [0001] The invention relates to a microwave-absorbing honeycomb with a pyramid-like structure and a preparation method thereof, belonging to the technical field of microwave-absorbing materials. Background technique [0002] The absorbing honeycomb is mainly obtained by impregnating the absorbing agent and depositing a layer of absorbing agent in the cell wall of the honeycomb to obtain the absorbing characteristic. The honeycomb is processed into the shape of sheet or pyramid, and then impregnated with absorbent to meet the application requirements of different fields. Among them, the microwave-absorbing honeycomb pyramid has excellent microwave-absorbing performance, and is widely used in microwave anechoic chambers or dark boxes. For the wave-absorbing honeycomb pyramid obtained by a single impregnation method, the absorber can easily form a concentration gradient in the thickness direction of the honeycomb, which is not conducive to the stability control...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05K9/00B32B3/12B32B7/12B32B37/10B32B37/12B32B38/00
CPCH05K9/0081H05K9/0086B32B3/12B32B7/12B32B37/10B32B37/1018B32B37/12B32B38/0036B32B2038/0076B32B2307/212
Inventor 马向雨邢孟达廖昊彦许皓林海燕赵宏杰
Owner AEROSPACE INST OF ADVANCED MATERIALS & PROCESSING TECH
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