CN107323007A - A kind of absorbing material preparation technology of honeycomb sandwich structure - Google Patents

A kind of absorbing material preparation technology of honeycomb sandwich structure Download PDF

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Publication number
CN107323007A
CN107323007A CN201710550323.1A CN201710550323A CN107323007A CN 107323007 A CN107323007 A CN 107323007A CN 201710550323 A CN201710550323 A CN 201710550323A CN 107323007 A CN107323007 A CN 107323007A
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China
Prior art keywords
honeycomb
absorbing
fabric
wave
preparation technology
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CN201710550323.1A
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CN107323007B (en
Inventor
徐英莲
程田田
傅雅琴
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Yangzhou Sparkle Industrial Co ltd
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Zhejiang University of Technology ZJUT
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar form; Layered products having particular features of form
    • B32B3/10—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar form; Layered products having particular features of form characterised by a discontinuous layer, i.e. formed of separate pieces of material
    • B32B3/12—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar form; Layered products having particular features of form characterised by a discontinuous layer, i.e. formed of separate pieces of material characterised by a layer of regularly- arranged cells, e.g. a honeycomb structure
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/06—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the heating method
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/10—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the pressing technique, e.g. using action of vacuum or fluid pressure
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B38/00—Ancillary operations in connection with laminating processes
    • B32B38/08—Impregnating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B38/00—Ancillary operations in connection with laminating processes
    • B32B38/18—Handling of layers or the laminate
    • B32B38/1808—Handling of layers or the laminate characterised by the laying up of the layers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/02—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/02—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer
    • B32B5/12—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer characterised by the relative arrangement of fibres or filaments of different layers, e.g. the fibres or filaments being parallel or perpendicular to each other
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/22—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed
    • B32B5/24—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer
    • B32B5/26—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer another layer next to it also being fibrous or filamentary
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/20—Properties of the layers or laminate having particular electrical or magnetic properties, e.g. piezoelectric
    • B32B2307/212—Electromagnetic interference shielding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2571/00—Protective equipment
    • B32B2571/02—Protective equipment defensive, e.g. armour plates, anti-ballistic clothing

Abstract

The invention discloses a kind of preparation technology of the absorbing material with honeycomb sandwich structure.The present invention has the different fine count fiber of absorbing property from two or more, and the different fiber of absorbing property is designed to the fabric tissue of honeycomb arrangement, layer structure, realizes that fabric absorbs ripple internal intervention to greatest extent.For the Material Strength and wave absorbing efficiency of further increase material, the fabric of above-mentioned honeycomb layer structure is impregnated into some minutes in the plasticizer solution containing finite concentration wave absorbing agent, realize that wave absorbing agent is uniformly distributed in fabric, then thermal finalization processing is carried out, the structural stability of honeycomb sandwich structure material is improved.The honeycomb layer structure of bonded fabric of the present invention and the reasonable layout of a variety of absorbing materials, realize the efficient suction ripple of material, meet the development trend of absorbing material " thin, light, wide, strong ".

Description

A kind of absorbing material preparation technology of honeycomb sandwich structure
Technical field
It is specific open a kind of with honeycomb sandwich structure suction ripple the present invention relates to a kind of preparation technology of efficient absorbing material The preparation method of material, available for preparing electromagnetic protection cover or military stealthy equipment.
Background technology
With the development of information technology, increasing electromagnetic wave exposure in atmosphere, influences communication quality and accurate instrument The normal use of device and health, absorbing material can improve precision, the reduction of equipment in the application of large scale equipment protective cover Electromagnetic pollution.The acquisition of information (can absorb radar electromagnetic wave with the key technology that anti-acquisition is modern military industry equipment, stealth material Material) quality of absorbing property is to weigh one of important indicator of modern military industry equipment.
According to the moulding process of absorbing material and the difference of bearing capacity, coating type absorbing material and structural type can be divided into The major class of absorbing material two.Coating type absorbing material is mainly realized by absorbent inhales ripple, prepared with spraying coating process based on, technique stream Journey is short, and spray layer thickness is thin, the absorbent uniformity is poor, intensity is not high.Structural absorbing mater ials mainly pass through certain structure Form improves the absorbing property of material, to be molded based on manufacture or cut manufacturing process, also gradually starts at present towards increasing material direction Development, but structural form is simple, is related in terms of the internal structure design of structural form few.
Structural absorbing mater ials are divided into layer plate profile structure and the class of sandwiched structure two again.Layer plate profile structure is main by impedance With layer (making electromagnetic wave more incident), low dielectric layer (forming dielectric gradient absorbent structure), lossy layer (loss electromagnetism Ripple) three zones layer composition；Sandwiched structure is by panel (making electromagnetic wave more incident), sandwich (loss electromagnetic wave), bottom Plate (reflection electromagnetic wave) is composited.Honeycomb (hexagon, rectangle, square, rhombus etc. are a variety of) belongs to sandwiched knot Structure.In recent years, researcher prepares from different suction ripple requirements in layer plate profile structure and the absorbing material of sandwiched structure Aspect has some achievements in research.
Patent No. 201610772163.0, the Chinese patent of entitled " a kind of wideband wave absorbing material and preparation method thereof " In disclose a kind of method, using low-frequency wave-absorbing material as bottom, high frequency absorbing material is used as top layer；Wherein low-frequency wave-absorbing material FeSi or FeSiAl are selected as additive, and prepare using rolling depression method；High frequency absorbing material by some various concentrations high frequency Inhale ripple layer to constitute, from Carbonyl iron particles as additive, and high frequency absorbing material top layer is prepared using three-dimensionally shaped technique, most The effect of wideband is reached eventually.
This technique can add different wave absorbing agents, design and inhale ripple layer, prepare sandwich construction suction according to different suction wave frequency rate requirements Wave material.With the Multi-layers distributing of wave absorbing agent, the wave-absorbing effect of design frequency can be realized to a certain extent, but inhale wave-particle Distribution consistency degree is difficult to control to, and prepare the thickness of material, weight is influenceed by rolling technology precision and material.
A kind of suction is disclosed in Patent No. 201510520354.3, the Chinese patent of entitled " a kind of wave-absorber structure " Wave structure, as bottom plate, and on a metal plate, covering electrical loss body (resistor disc is in Multi-layers distributing with honeycomb) makes suction to metal Ripple body thickness is reduced, and inhales wave frequency section wider.
The above method, by the way that, as bottom plate, electromagnetic wave is entered repeatedly by the reflex of metal sheet surface using metallic plate Absorbing material layer, increases the loss of electromagnetic wave.The material that the absorbing material prepared according to this technique inhales ripple layer is single, inhales wave frequency section Selectivity it is strong.
The content of the invention
In view of the deficiencies of the prior art, the present invention provides a kind of absorbing material preparation technology of honeycomb sandwich structure.
The present invention is set the different fiber of absorbing property from the different fine count fiber of two or more absorbing property Honeycomb (such as hexagon, pentagon, corner rhombus) arrangement, the fabric tissue of layer structure are counted into, then by above-mentioned honeycomb stratiform The fabric of structure impregnates some minutes in the plasticizer solution containing finite concentration wave absorbing agent (nanoscale suction wave-particle), finally Thermal finalization processing is carried out, the structural stability of honeycomb sandwich structure material is improved.
Specific embodiment and technological requirement of the present invention are as follows：
1st, material is selected：The fine count fiber for selecting two or more absorbing property different.The ripple containing suction can be selected to receive The fiber or common textile fibers of rice corpuscles, yarn texture is based on long filament.For the absorbing material used in high temperature environments Select high-temperature fibre.
2nd, honeycomb stratiform structure design：
(1) honeycomb shape requirement：Hexagon cellular, positive pentagon and corner rhombus etc..
(2) size of honeycomb pattern：The size of honeycomb pattern is designed according to the phase difference of audio range frequency.
(3) arrangement of honeycomb pattern：The honeycomb pattern of different textile materials can the relative or arrangement that is staggered.
(4) different textile materials are uniformly distributed in honeycomb.
(5) layer structure of honeycomb weave fabric：In layered distribution, the honeycomb pattern rule of fabric positive and negative is same or similar.
3rd, wave-particle sublayer composite-making process is inhaled：
(1) wave-particles are inhaled according to the one or more nanoscales of suction ripple Frequency Band Selection.
(2) selection and preparation of maceration extract：According to the requirement of absorbing material, the species of selective plasticization agent, nano wave-absorption grain The concentration of son；Maceration extract is prepared, makes being dispersed in maceration extract for nano wave-absorption particle.
(3) honeycomb stratiform construction fabric impregnates some minutes (normal temperature) in maceration extract, wave absorbing agent is knitted in honeycomb stratiform It is uniformly distributed in thing.
(4) thermal finalization：It is uniformly distributed to ensure to inhale wave-particle in honeycomb laminate fabric, from thermocompression forming mode.Heat Press temperature according to the plasticizer of selection and the temperature tolerance of fibrous material, highest setting temperature must not exceed the thawing temperature of fibrous material Degree.
Beneficial effects of the present invention：The present invention mutually ties the absorbing property that honeycomb layer structure inhales wave-particle with nanoscale Close, electromagnetic wave repeatedly reflected, absorbed, the loss of electromagnetic wave to greatest extent in fabric.The present invention can inhale structural type Ripple mode is inhaled ripple mode with application type and is combined, and makes the wave-absorbing effect of absorbing material wider, stronger.
Brief description of the drawings
Fig. 1 is a kind of rhombus laminate fabric front view (sample 1)；
Fig. 2 is another rhombus laminate fabric front view (sample 2)；
Fig. 3 is the wave-absorbing effect figure of sample 1；
Fig. 4 is the wave-absorbing effect figure of sample 2；
Fig. 5 is the fabric positive and negative design sketch of sample 3；
Fig. 6 is the wave-absorbing effect figure of sample 3.
Embodiment
With reference to embodiment, the present invention is described further, but the scope of protection of present invention is not limited to The scope of embodiment expression.Unless otherwise indicated.
Embodiment one：
(1) fibrous material：Select the fine-denier carbon black fibre (22.2dtex/4F × 12) and fine-denier of the particle containing nano carbon black Polyester fiber (81dtex/30F × 3) coordinates.
(2) honeycomb stratiform structure design：Design honeycomb shape is corner rhombus, in arranged opposite, the rhombus diagonal chi of sample 1 Very little (2.8cm × 4.9cm), is shown in Fig. 1, and the rhombus Diagonal Dimension (1.5cm × 2.5cm) of sample 2 is shown in Fig. 2.Two kinds of fibers of every kind of sample Corner rhombus it is equal in magnitude, each rhombus is double-deck one side plain weave, and rhombus junction levels fabric interweaves；Knit The positive and negative of thing mirror-image structure each other.
(3) braiding of honeycomb stratiform structure organization fabric：According to thickness of yarn and honeycomb stratiform Structural Design Requirement, in electricity Design textile pattern tissue in brain straight-bar machines Pattern preparation system, knitting.Computer horizontal eedle number is 10 pins/inch, horizontal density 25/5cm, indulges density 46/5cm.Fabric sample.
(4) configuration of maceration extract：It is plasticizer that nano barium phthalate, which is selected, as wave-particle, PVC is inhaled, ATBC, Epoxidized soybean oil is stabilizer, by following Process configuration maceration extract：
PVC 220g；ATBC 260g；Epoxidized soybean oil 20g；Nano barium phthalate 20g.(with 100g fabric weights On the basis of amount).
(5) honeycomb laminate fabric impregnates：At normal temperatures, honeycomb stratiform construction fabric is impregnated 10 minutes in maceration extract, Slightly crumpled with hand, wave absorbing agent is uniformly distributed in honeycomb laminate fabric.
(6) thermal finalization：Thermal finalization is carried out to fabric after dipping using vulcanizing press, setting process condition is：Sizing pressure Power：2.5Mpa, temperature：150 DEG C, time：10min.
(7) test of wave-absorbing effect：Above-mentioned material is tested on Agilent vector network analyzer (Agilent 5230c) The absorbing property of material, the wave-absorbing effect of material is as shown in Figure 3 and Figure 4.
Sample 1 in the wideband of 8.82GHZ~16.47GHZ scopes, the reflectivity dB values of material maintain -8.23~- Fluctuated in 10.97, the wave-absorbing effect of material is good；In the range of 6.62GHZ~6.70GHZ, reflectivity dB values reach as high as- 20.09, wave-absorbing effect is optimal.
Sample 2 is in the wideband of 9.08GHZ~15.98GHZ scopes, and dB values maintain fluctuation, material in -10.37~-11.97 The wave-absorbing effect of material is good；In the range of 6.49GHZ~6.73GHZ, reflectivity dB values reach as high as -21.87, and wave-absorbing effect is most It is good.
Embodiment two：
(1) fibrous material：Selection is added with nano-TiO2The delustring polyester fiber (81dtex/30F × 3) of particle and contain The fine-denier carbon black fibre (22.2dtex/4F × 12) of nano carbon black particle coordinates.
(2) honeycomb stratiform structure design：Design honeycomb be corner rhombus, rhombus Diagonal Dimension (2.7cm × 5.2cm), in the arrangement that is staggered, as shown in Figure 5.Fabric tissue is double-deck one side plain weave, and levels fabric is in two kinds of yarns Junction interweaves；The positive and negative of fabric mirror-image structure each other.
(3) braiding of honeycomb stratiform structure organization fabric：According to thickness of yarn and honeycomb stratiform Structural Design Requirement, in electricity Design textile pattern tissue in brain straight-bar machines Pattern preparation system, knitting.Computer horizontal eedle number is 10 pins/inch, horizontal density 26/5cm, indulges density 48/5cm.Fabric sample is as shown in Figure 5.
(4) configuration of maceration extract：It is plasticizer that nano barium phthalate, which is selected, as wave-particle, PVC is inhaled, ATBC, Epoxidized soybean oil is stabilizer, by following Process configuration maceration extract：
PVC 220g；ATBC 260g；Epoxidized soybean oil 20g；Nano barium phthalate 20g.(with 100g fabric weights On the basis of amount).
(5) honeycomb laminate fabric impregnates：At normal temperatures, honeycomb stratiform construction fabric is impregnated 10 minutes in maceration extract, Slightly crumpled with hand, wave absorbing agent is uniformly distributed in honeycomb laminate fabric.
(6) thermal finalization：Thermal finalization is carried out to fabric after dipping with vulcanizing press, setting process condition is：Sizing pressure Power：2.5Mpa, temperature：150 DEG C, time：10min.
(7) test of wave-absorbing effect：Above-mentioned material is tested on Agilent vector network analyzer (Agilent 5230c) The absorbing property of material, the wave-absorbing effect of material, as a result as shown in Figure 6.
Sample 3 is in the wideband of 8.90GHZ~16.33GHZ scopes, and reflectivity dB values maintain ripple in -8.58~-11.00 Dynamic, the wave-absorbing effect of material is good；In the range of 6.56GHZ~6.71GHZ, reflectivity dB values reach as high as -20.28, inhale ripple Best results.
To sum up, the present invention has been carried out rationally in terms of the selection of absorbing material, the distribution of absorbing material and overall structure Design, wave-particle sublayer composite-making process is inhaled using honeycomb layer structure and the nanoscale of yarn fabric, various materials are disclosure satisfy that Matter is uniformly distributed by design requirement, is inhaled wave frequency section and is met design requirement, and wave absorbing efficiency is high, and the strength of materials is high, realizes and inhales ripple material Expect the requirement of " thin, light, wide, strong ".

Claims (5)

1. a kind of absorbing material preparation technology of honeycomb sandwich structure, it is characterised in that：From two or more wave absorbtion The different fine count fiber of energy, the different fine count fiber of absorbing property is designed to the fabric tissue of honeycomb arrangement, layer structure, so The fabric of above-mentioned honeycomb layer structure is impregnated into some minutes in the plasticizer solution containing finite concentration wave absorbing agent afterwards, makes suction Ripple agent is uniformly distributed in fabric, finally carries out thermal finalization processing, improves the structural stability of honeycomb sandwich structure material.
2. absorbing material preparation technology according to claim 1, it is characterised in that：The honeycomb its be shaped as hexagonal honeybee, Positive pentagon or corner rhombus；The size of honeycomb pattern depends on the phase difference of audio range frequency；The honeybee of different textile materials Nest pattern is relative or the row of being staggered.
3. absorbing material preparation technology according to claim 1, it is characterised in that：The honeycomb figure for knitting its positive and negative Case rule is same or similar.
4. absorbing material preparation technology according to claim 1, it is characterised in that：Nanoscale in the wave absorbing agent inhales ripple Particle has one or more, is selected according to wave frequency section is inhaled.
5. absorbing material preparation technology according to claim 1, it is characterised in that：Thermocompression forming is selected in described thermal finalization Mode, hot pressing temperature is according to the plasticizer of selection and the temperature tolerance of fibrous material, and highest sets temperature no more than fibrous material Melt temperature.
CN201710550323.1A 2017-07-07 2017-07-07 A kind of absorbing material preparation process of honeycomb sandwich structure Active CN107323007B (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110041884A (en) * 2018-01-15 2019-07-23 深圳烯创先进材料研究院有限公司 A kind of leaf shape nanometer Fe3O4The preparation method of the honeycomb sandwich structure Wave suction composite material of filling
CN110970734A (en) * 2019-12-19 2020-04-07 中国航空工业集团公司西安飞机设计研究所 Wave-absorbing honeycomb structure
CN112757713A (en) * 2021-01-28 2021-05-07 北京机电工程研究所 Multifunctional protection and multi-spectrum stealth structure and preparation method thereof

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000013084A (en) * 1998-06-24 2000-01-14 Yokohama Rubber Co Ltd:The Manufacture of electromagnetic wave absorber
CN103898736A (en) * 2014-01-23 2014-07-02 上海嘉乐股份有限公司 Anti-radiation finishing processing method for fabric
CN105015063A (en) * 2014-04-23 2015-11-04 秦曦蕾 Plaid anti-radiation, antibacterial and deodorization fabric

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000013084A (en) * 1998-06-24 2000-01-14 Yokohama Rubber Co Ltd:The Manufacture of electromagnetic wave absorber
CN103898736A (en) * 2014-01-23 2014-07-02 上海嘉乐股份有限公司 Anti-radiation finishing processing method for fabric
CN105015063A (en) * 2014-04-23 2015-11-04 秦曦蕾 Plaid anti-radiation, antibacterial and deodorization fabric

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110041884A (en) * 2018-01-15 2019-07-23 深圳烯创先进材料研究院有限公司 A kind of leaf shape nanometer Fe3O4The preparation method of the honeycomb sandwich structure Wave suction composite material of filling
CN110041884B (en) * 2018-01-15 2022-05-17 深圳烯创先进材料研究院有限公司 Leaf-shaped nano Fe3O4Preparation method of filled wave-absorbing composite material with honeycomb sandwich structure
CN110970734A (en) * 2019-12-19 2020-04-07 中国航空工业集团公司西安飞机设计研究所 Wave-absorbing honeycomb structure
CN110970734B (en) * 2019-12-19 2021-07-16 中国航空工业集团公司西安飞机设计研究所 Wave-absorbing honeycomb structure
CN112757713A (en) * 2021-01-28 2021-05-07 北京机电工程研究所 Multifunctional protection and multi-spectrum stealth structure and preparation method thereof
CN112757713B (en) * 2021-01-28 2023-01-10 北京机电工程研究所 Multifunctional protection and multi-spectrum stealth structure and preparation method thereof

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