Honeycomb flat plate wave-absorbing material for P wave band and manufacturing method of honeycomb flat plate wave-absorbing material

Abstract

The invention relates to the technical field of wave-absorbing material preparation, in particular to a honeycomb flat plate wave-absorbing material for a P wave band and a manufacturing method of the honeycomb flat plate wave-absorbing material. The honeycomb flat plate wave-absorbing material for the P wave band comprises a honeycomb flat plate material impregnated with a water-based wave-absorbing impregnating material, wherein the water-based wave-absorbing impregnating material comprises a water-based silicone acrylic emulsion, a dispersing agent, a wave-absorbing agent, a dielectric constant regulator and a defoaming agent; the manufacturing method comprises the following steps: preparing a water-based wave-absorbing impregnated material; soaking the honeycomb flat plate material in the water-based wave-absorbing impregnated material; controlling the feeding weight of the honeycomb flat plate material for the first time and drying; controlling the feeding amount of the secondary honeycomb flat plate material and drying; controlling the feeding amount of the third honeycomb panel material to be the weight of the base material, and drying to obtain the wave-absorbing material for the P-band honeycomb panel; the density of the honeycomb flat plate wave-absorbing material for the P wave band is increased to 96 kg / m < 3 > from 48 kg / m < 3 >, and the reflectivity of the material at 800 MHz is smaller than or equal to-15 dB according to measurement of a coaxial reflectometer.

Description

Technical Field

[0001] The present invention relates to the technical field of preparing absorbing materials, and in particular to a honeycomb flat absorbing material for a P-band and a manufacturing method thereof. Background Art

[0002] Honeycomb absorbing panels are one of the most important materials used in the field of aerospace stealth. Honeycomb sandwich absorbing composite materials have the advantages of strong designability and large-area integral molding, and have become the focus of stealth material development. However, the current P-band honeycomb absorbing panel materials cannot achieve a reflectivity of ≤-15dB at 800MHz. Summary of the invention

[0003] The object of the present invention is to provide a P-band honeycomb flat-plate absorbing material and a manufacturing method thereof, aiming to solve the technical problem that the P-band honeycomb flat-plate absorbing material in the prior art cannot achieve a reflectivity of ≤-15dB at 800MHz.

[0004] To achieve the above-mentioned purpose, the present invention adopts a P-band honeycomb flat-plate absorbing material, comprising a honeycomb flat-plate material impregnated with an aqueous absorbing impregnating material; wherein the aqueous absorbing impregnating material comprises an aqueous silicone acrylic emulsion, a dispersant, an absorbing agent, a dielectric constant regulator, and a defoaming agent.

[0005] Wherein, the water-based silicone acrylic emulsion is GS-30 emulsion.

[0006] Wherein, the dispersant is 750W dispersant.

[0007] Wherein, the absorber is FeCrSi.

[0008] Wherein, the dielectric constant regulator is one or a combination of titanium dioxide and copper oxide.

[0009] Wherein, the defoaming agent is a mixture of mineral oil, silicone resin and acrylates.

[0010] The present invention also provides a method for manufacturing a P-band honeycomb flat-plate absorbing material, comprising the following steps:

[0011] preparing the water-based wave-absorbing impregnating material;

[0012] Soaking the honeycomb flat panel material in the aqueous wave-absorbing impregnating material;

[0013] Controlling the first loading weight of the honeycomb flat plate material to be 2.2 to 2.8 times the weight of the substrate, and drying;

[0014] Controlling the feeding amount of the honeycomb flat plate material for the second time to be 1.7 to 2.1 times the weight of the substrate, and drying;

[0015] The feeding amount of the honeycomb flat plate material is controlled to be 1.1 to 1.4 times of the weight of the substrate for the third time, and the material is dried to obtain the honeycomb flat plate absorbing material for the P band.

[0016] Wherein, in the step of preparing the water-based wave-absorbing impregnating material, the preparation process is:

[0017] Dispersing water, the dispersant, the absorbent and the dielectric constant regulator evenly to form an aqueous slurry;

[0018] Grinding the aqueous slurry to obtain a grinding slurry, wherein the diameter of the grinding slurry is 5 to 10 microns;

[0019] The polishing slurry and the aqueous silicone acrylic emulsion are evenly dispersed, and the defoaming agent is added to form the aqueous wave absorbing impregnation liquid.

[0020] The present invention discloses a P-band honeycomb flat-panel absorbing material and a method for manufacturing the same. The P-band honeycomb flat-panel absorbing material comprises a honeycomb flat-panel material impregnated with an aqueous absorbing impregnating material; wherein the aqueous absorbing impregnating material comprises an aqueous silicone acrylic emulsion, a dispersant, an absorbing agent, a dielectric constant regulator, and a defoaming agent. The P-band honeycomb flat-panel absorbing material is obtained by preparing the aqueous absorbing impregnating material; immersing the honeycomb flat-panel material in the aqueous absorbing impregnating material; controlling the first loading weight of the honeycomb flat-panel material to be 2.2 to 2.8 times the weight of the substrate, and drying; controlling the second loading amount of the honeycomb flat-panel material to be 1.7 to 2.1 times the weight of the substrate, and drying; controlling the third loading amount of the honeycomb flat-panel material to be 1.1 to 1.4 times the weight of the substrate, and drying; and obtaining the P-band honeycomb flat-panel absorbing material with a density of 48kg / m 3 Increased to 96kg / m 3 , the reflectivity of the material at 800MHz is measured by a coaxial reflectometer and is ≤-. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1 It is a flow chart of the steps of the method for manufacturing the P-band honeycomb flat-plate absorbing material of the present invention.

[0023] Figure 2 It is a flow chart of the steps for preparing the water-based wave absorbing impregnating material of the present invention. DETAILED DESCRIPTION

[0024] The invention provides a P-band honeycomb flat-plate absorbing material, comprising a honeycomb flat-plate material impregnated with an aqueous absorbing impregnating material; wherein the aqueous absorbing impregnating material comprises an aqueous silicone-acrylic emulsion, a dispersant, an absorbing agent, a dielectric constant regulator, and a defoaming agent.

[0025] Furthermore, the water-based silicone acrylic emulsion is GS-30 emulsion.

[0026] Furthermore, the dispersant is a 750W dispersant.

[0027] Furthermore, the absorber is FeCrSi.

[0028] Furthermore, the dielectric constant regulator is one or a combination of titanium dioxide and copper oxide.

[0029] Furthermore, the defoaming agent is a mixture of mineral oil, silicone resin and acrylates.

[0030] See also Figure 1 and Figure 2 The present invention also provides a method for manufacturing a P-band honeycomb flat-plate absorbing material, comprising the following steps:

[0031] S100: preparing the water-based microwave absorbing impregnating material;

[0032] S200: soaking the honeycomb flat plate material in the aqueous wave-absorbing impregnating material;

[0033] S300: controlling the first loading weight of the honeycomb flat plate material to be 2.2 to 2.8 times the weight of the substrate, and drying;

[0034] S400: controlling the feeding amount of the honeycomb flat plate material for the second time to be 1.7 to 2.1 times the weight of the substrate, and drying;

[0035] S500: controlling the third feeding amount of the honeycomb flat plate material to be 1.1 to 1.4 times the weight of the substrate, and drying the material to obtain the honeycomb flat plate absorbing material for the P band.

[0036] Furthermore, in the step of preparing the water-based wave-absorbing impregnating material, the preparation process is:

[0037] S101: uniformly dispersing water, the dispersant, the absorbent and the dielectric constant regulator respectively to form an aqueous slurry;

[0038] S102: grinding the aqueous slurry to obtain a grinding slurry, wherein the diameter of the grinding slurry is 5 to 10 microns;

[0039] S103: Evenly dispersing the polishing slurry and the aqueous silicone acrylic emulsion, and adding the defoaming agent to form the aqueous microwave absorbing impregnation liquid.

[0040] In this embodiment, the aqueous absorbing impregnation material is first prepared; wherein the aqueous absorbing impregnation material includes aqueous silicone acrylic emulsion, dispersant, absorbent, dielectric constant regulator, and defoamer; the aqueous silicone acrylic emulsion is GS-30 emulsion; the dispersant is 750W dispersant; the absorbent is FeCrSi; the dielectric constant regulator is one or a combination of titanium dioxide and copper oxide; the defoamer is a mixture of mineral oil, silicone resin, and acrylates; the preparation process is: water, the dispersant, the absorbent, and the dielectric constant regulator are dispersed evenly to form an aqueous slurry. The aqueous slurry is ground to obtain a grinding slurry, and the diameter of the grinding slurry is 5 to 10 microns. The grinding slurry and the aqueous silicone acrylic emulsion are evenly dispersed, and the defoamer is added to form the aqueous absorbing impregnation liquid. Then the honeycomb flat plate material is immersed in the aqueous absorbing impregnation material. The first loading weight of the honeycomb flat panel material is controlled to be 2.2 to 2.8 times the weight of the substrate, and the material is dried. The second loading weight of the honeycomb flat panel material is controlled to be 1.7 to 2.1 times the weight of the substrate, and the material is dried. The third loading weight of the honeycomb flat panel material is controlled to be 1.1 to 1.4 times the weight of the substrate, and the material is dried to obtain the honeycomb flat panel absorbing material for P band. The honeycomb flat panel absorbing material for P band prepared in the above manner has a density of 48kg / m 3 Increased to 96kg / m 3 The reflectivity of the material at 800MHz is ≤-15dB as measured by a coaxial reflectometer.

[0041] The present invention is further described below in conjunction with the examples. It should be understood that the examples are only used to illustrate the present invention, but not to limit the scope of the present invention. Table 1 shows the proportions of the various raw material components in the aqueous absorbing impregnation liquids described in Examples 1 to 5, and the content of each raw material component in Table 1 is in parts by weight.

[0042]

[0043] Table 1

[0044] Example 1

[0045] According to Example 1 in Table 1, 30 parts of water, 3 parts of dispersant, 10 parts of titanium dioxide, and 45 parts of absorbent were weighed; introduced into the dispersion barrel of a high-speed disperser, stirred at a speed of 600RPM, and stirred for 30 minutes to form a uniform aqueous slurry. 88 parts of the aqueous slurry were introduced into a grinder and ground to 10 microns, and then the ground slurry was poured into the stirring barrel of the high-speed disperser, and 30 parts of aqueous silicone propylene emulsion were added in sequence, stirred at a speed of 500RPM, and after high-speed stirring for 15 minutes, 0.05 parts of defoaming agent was added and stirred for 5 minutes to form an aqueous absorbing impregnation liquid.

[0046] A honeycomb flat plate with a thickness of 30 mm and a pore size of 4.8 mm was immersed in the above aqueous impregnation liquid for 10 minutes, and the excess liquid was removed. The weight of the honeycomb flat plate material was controlled to be 2.6 times the weight of the substrate and dried; the second time, the loading amount was controlled to be 2 times the weight of the substrate and dried, and the third time, the loading amount was controlled to be 1.2 times and dried. The honeycomb flat plate absorbing material has a density of 48 kg / m 3 Increased to 96kg / m 3 The measured reflectivity of the flat absorbing material at 800MHz is better than -15dB.

[0047] Embodiments 2 to 5

[0048] Examples 2 to 5: According to the raw material compositions of Examples 2 to 5 in Table 1, samples were prepared in sequence referring to the steps of Example 1 and the reflectivity of the materials at 800 MHz was measured. The reflectivity is shown in Table 2.

[0049] project Example 2 Example 3 Example 4 Example 5 Example 5 800MHz reflectivity(dB) -17 -18 -20 -19 -23

[0050] Table 2

[0051] The honeycomb flat plate absorbing material for P band is prepared by Examples 1 to 5, and the density is 48kg / m 3 Increased to 96kg / m 3 The reflectivity of the material at 800MHz is ≤-15dB as measured by a coaxial reflectometer.

[0052] The above description is only a preferred embodiment of the present invention, and is not any formal or substantial limitation of the invention. It should be pointed out that ordinary technicians in this technical field can make several improvements and supplements without departing from the present invention. These modifications and supplements should also be regarded as the protection scope of the present invention. Any technician familiar with this profession, without departing from the spirit and scope of the present invention, can make some changes and equivalent changes of the technical content disclosed above, which are equivalent embodiments of the present invention; at the same time, any changes, modifications and evolutions of any equivalent changes made to the above embodiments based on the essential technology of the present invention are within the scope of the technical solution of the present invention.

Claims

1. A P-band honeycomb flat-plate absorbing material, characterized in that: The invention comprises a honeycomb flat plate material impregnated with a water-based wave-absorbing impregnating material; wherein the water-based wave-absorbing impregnating material comprises a water-based silicone-acrylic emulsion, a dispersant, a wave-absorbing agent, a dielectric constant adjusting agent and a defoaming agent.

2. The P-band honeycomb flat-plate absorbing material according to claim 1, characterized in that: The water-based silicone acrylic emulsion is GS-30 emulsion.

3. The P-band honeycomb flat-plate absorbing material according to claim 1, characterized in that: The dispersant is 750W dispersant.

4. The P-band honeycomb flat-plate absorbing material according to claim 1, characterized in that: The absorber is FeCrSi.

5. The P-band honeycomb flat-plate absorbing material according to claim 1, characterized in that: The dielectric constant regulator is one of titanium dioxide and copper oxide or a combination of both.

6. The P-band honeycomb flat-plate absorbing material according to claim 1, characterized in that: The defoamer is a mixture of mineral oil, silicone resin and acrylates.

7. A method for manufacturing a P-band honeycomb flat-plate absorbing material, manufacturing the P-band honeycomb flat-plate absorbing material as claimed in claim 1, characterized in that: The steps include: preparing the water-based wave-absorbing impregnating material; Soaking the honeycomb flat panel material in the aqueous wave-absorbing impregnating material; Controlling the first loading weight of the honeycomb flat plate material to be 2.2 to 2.8 times the weight of the substrate, and drying; Controlling the feeding amount of the honeycomb flat plate material for the second time to be 1.7 to 2.1 times the weight of the substrate, and drying; The feeding amount of the honeycomb flat plate material is controlled to be 1.1 to 1.4 times of the weight of the substrate for the third time, and the material is dried to obtain the honeycomb flat plate absorbing material for the P band.

8. The method for manufacturing a P-band honeycomb flat-plate absorbing material according to claim 7, characterized in that: In the step of preparing the water-based wave-absorbing impregnating material, the preparation process is: Dispersing water, the dispersant, the absorbent and the dielectric constant regulator evenly to form an aqueous slurry; Grinding the aqueous slurry to obtain a grinding slurry, wherein the diameter of the grinding slurry is 5 to 10 microns; The polishing slurry and the aqueous silicone acrylic emulsion are evenly dispersed, and the defoaming agent is added to form the aqueous wave absorbing impregnation liquid.

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