CN109353100A - The high power combined absorbing material of nonflammable broadband - Google Patents

The high power combined absorbing material of nonflammable broadband Download PDF

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Publication number
CN109353100A
CN109353100A CN201811140856.3A CN201811140856A CN109353100A CN 109353100 A CN109353100 A CN 109353100A CN 201811140856 A CN201811140856 A CN 201811140856A CN 109353100 A CN109353100 A CN 109353100A
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CN
China
Prior art keywords
absorbing material
inner core
nonflammable
broadband
high power
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Granted
Application number
CN201811140856.3A
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Chinese (zh)
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CN109353100B (en
Inventor
胡益民
梁勇明
郭涛
樊迪刚
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Nanjing aerospace Boping Electronic Technology Co.,Ltd.
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Nanjing Boping Electronic Technology Co Ltd
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Publication of CN109353100A publication Critical patent/CN109353100A/en
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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
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/36—Layered products comprising a layer of synthetic resin comprising polyesters
    • 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
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • 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
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/12—Layered products comprising a layer of synthetic resin next to 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
    • B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form
    • B32B3/02—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by features of form at particular places, e.g. in edge regions
    • B32B3/06—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by features of form at particular places, e.g. in edge regions for securing layers together; for attaching the product to another member, e.g. to a support, or to another product, e.g. groove/tongue, interlocking
    • 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
    • B32B33/00—Layered products characterised by particular properties or particular surface features, e.g. particular surface coatings; Layered products designed for particular purposes not covered by another single class
    • 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
    • B32B9/00—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00
    • B32B9/04—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00 comprising such particular substance as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B9/045—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00 comprising such particular substance as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q17/00—Devices for absorbing waves radiated from an antenna; Combinations of such devices with active antenna elements or systems
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q17/00—Devices for absorbing waves radiated from an antenna; Combinations of such devices with active antenna elements or systems
    • H01Q17/008—Devices for absorbing waves radiated from an antenna; Combinations of such devices with active antenna elements or systems with a particular shape
    • 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
    • B32B2250/00—Layers arrangement
    • B32B2250/03—3 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
    • B32B2250/00—Layers arrangement
    • B32B2250/40—Symmetrical or sandwich layers, e.g. ABA, ABCBA, ABCCBA
    • 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
    • B32B2260/00—Layered product comprising an impregnated, embedded, or bonded layer wherein the layer comprises an impregnation, embedding, or binder material
    • B32B2260/02—Composition of the impregnated, bonded or embedded layer
    • B32B2260/021—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
    • B32B2260/00—Layered product comprising an impregnated, embedded, or bonded layer wherein the layer comprises an impregnation, embedding, or binder material
    • B32B2260/04—Impregnation, embedding, or binder material
    • B32B2260/046—Synthetic resin
    • 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
    • B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
    • B32B2262/10—Inorganic fibres
    • B32B2262/101—Glass fibres
    • 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
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/30—Properties of the layers or laminate having particular thermal properties
    • B32B2307/306—Resistant to heat
    • B32B2307/3065—Flame resistant or retardant, fire resistant or retardant

Landscapes

  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Laminated Bodies (AREA)
  • Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)

Abstract

The present invention relates to a kind of high power combined absorbing materials of nonflammable broadband, which includes outer housing and inner core, which is characterized in that the outer housing is to inhale wave ignition resistant substrate by flame-retardant layer/conductive film/flame-retardant layer composite layer to constitute；The inner core is at least one inner core-body, and conductive fire retardant polystyrene small spherical particles are filled in inner core-body；Inner core-body bottom is bonded into one with outer housing bottom inside.Process prepared by absorbing material of the present invention greatly reduces compared with the process of the fire retardant absorbing material of conventional nonwoven fabric base.And absorbing material substrate, inner core, inhales wave filler particles and is able to achieve to automate and produce in enormous quantities shell, thoroughly solves the time-consuming disadvantage of nonwoven fabric base flame resisting wave-absorbing material.

Description

The high power combined absorbing material of nonflammable broadband
Technical field
The present invention relates to a kind of nonflammable broadband absorbing materials, relate generally to a kind of applied to fully anechoic chamber and half electricity The important materials in wave darkroom, overcome that traditional non-woven cloth external coating is fire-retardant, conductive agent, crush-cutting, and the processes production such as adhesion-molded is difficult Combustion type absorbing material production efficiency is relatively low, human cost problem bigger than normal.
Background technique
Absorbing material has in the seventies to be commercially produced, Dalian Eastcom of country's nineties, Nanjing popin, the Dalian land Zhong Shan The continuous absorbing material production industrialization completed with flexible polyurethane foam class substrate.But flexible polyurethane foam class There is also be difficult to the shortcomings that overcoming for absorbing material: although first, polyurethane foam absorbing material by flame retardant treatment, itself Constituent is difficult its oxygen index (OI) more than 40%, and anti-flammability performance only reaches B2 grades, is easy hair in the case where some extreme Raw fire incident.The second, the resistance to power-performance of polyurethanes absorbing material is no more than 1500W/m2Even if expanding polyurethanes substrate Aperture to 5mm, resistance to power-performance also only has 3200W/m2.As power density >=4000W/m2Electromagenetic wave radiation is in polyurethane When on the absorbing material of foamed plastics, fire incident still can occur.Third, polyurethane foam pyramid height locating for it are higher When, due to own wt, in use for some time, the tip of material pyramid can bend, so that darkroom is beautiful Property be deteriorated, the decline of whole darkroom performance.To overcome the above disadvantages, domestic manufacturer Nanjing Lip river is general, Nanjing popin successively develops difficulty Combustion type absorbing material such as CN16649860B, CN100511487C and CN103347379A, it is base that they, which are all made of non-woven fabrics, Material is coated with fire retardant and absorbent in substrate surface, and then crush-cutting, folding, bonding form the fire retardant absorbing material of pyramid non-woven fabrics, Solve the problems, such as that polyurethanes absorbing material elbow, picking, anti-flammability are relatively low, resistance to power is high.But above-mentioned non-woven fabrics inhales wave material Material is difficult to the shortcomings that overcoming there is also some.Due to the brushing of nonwoven fabric base absorbing material, crush-cutting, folding, bonding all can not be real Existing automated production, artificial production nonwoven fabric base absorbing material process is more, and absorbing material is hand-made, quality and shape entirely Consistency often not can guarantee.Cause to exist between cube-corner elements in material and be difficult to complete to avoid gap, production capacity is constantly subjected to give birth to The constraint of production personnel.Therefore the above problem of nonwoven fabric base absorbing material is solved, improving production efficiency is purport of the invention.
Summary of the invention
The technical problems to be solved by the present invention are: in view of the problems of the existing technology, proposing a kind of nonflammable wideband With high-power composite wave-suction material, which has quick industry characteristics and excellent absorbing property and flame retardant property, and It is proposed the absorbing material production method.
The high power combined absorbing material of nonflammable broadband of the present invention, including outer housing 6 and inner core 7, it is described outer Shell 6 is to inhale wave ignition resistant substrate by flame-retardant layer/conductive film/flame-retardant layer composite layer to constitute；The inner core 7 is at least one Core, inner core-body is interior to fill conductive fire retardant polystyrene small spherical particles 8；Inner core bottom and outer housing bottom inside are bonded into one Body.
The number and size of inner core-body, those skilled in the art can be determined by required performance.The preferred pyramid of inner core-body, Preferably four sides pyramid；Four sides pyramid may be designed as self-locking bottom structure.
Heretofore described composite layer inhales wave ignition resistant substrate, is a kind of using fire-retardant at one layer of conductive film surface recombination Layer forms flame-retardant layer/three layers of conductive film/flame-retardant layer structure composite wave-absorbing ignition resistant substrate.Wherein conductive film is polyesters conductive film, Its sheet resistance value is 100 to 300 ohm/side, with a thickness of 0.2mm.Flame-retardant layer and conductive film are formed into " sandwich " structure phase Mutual heat pressure adhesive is at wave absorption base material.Outer housing is preferably pyramidal, is spliced by the substrate of shape by die-cutting, has on the substrate Connect mating groove.Such as: when preparing pyramidal outer housing, substrate can be cut into the bottom base of required shape by cutting Piece and triangle pyramidal plane substrate have the auxiliary section connecting with adjacent substrates, each base in bottom substrate and pyramidal plane substrate Piece is spliced into the shell of flame resisting wave-absorbing material by structure cooperation.It inhales and is bonded between wave outer housing and inner core-body with fireproof gum One.Inner core bottom and shell bottom plate bonding one composition flame resisting wave-absorbing material.
The flame-retardant layer of absorbing material is the one kind such as fire prevention quartz plate, fire prevention highland barley paper, epoxy fiberglass fiber plate in the present invention Material.Material is preferably prevented fires quartz plate, epoxy fiberglass fiber plate, with a thickness of 0.2 between 0.5mm.
In the present invention, the bottom self-locked four sides pyramid inner core is that fire prevention highland barley paper is combined with conductive film with substrate.So Afterwards with the four sides triangle wimble structure for cutting into self-locking bottom structure, it is bonded into and inhales wave resistance combustion pyrometric cone inner core.
In the present invention, the conduction fire retardant polystyrene bead is characterized by diameter 1.5mm to 3mm, and sheet resistance value is 300 ohm/side is between 500 ohm/side.Bead density is 50 to 70kg/m3, it is Nanjing popin Electronic Science and Technology Co., Ltd. Self-control.
Flame resisting wave-absorbing material of the invention is made of pin-connected panel shell, bottom self-locked inner core, conductive flame-retarding wave-absorbing filler material. Its process greatly reduces compared with the process of the fire retardant absorbing material of conventional nonwoven fabric base.And it is absorbing material substrate, shell, interior Core inhales wave filler particles and is able to achieve automation and produces in enormous quantities, thoroughly solves nonwoven fabric base flame resisting wave-absorbing material and takes a lot of work expense When the shortcomings that.
Detailed description of the invention
Fig. 1 composite layer inhales wave resistance and fires matrix structure figure
The pyramidal plane substrate structure figure of Fig. 2 outer housing.
Fig. 3 is the bottom substrate structure chart of outer housing.
Fig. 4 bottom self-locked four sides pyrometric cone inner core expanded view.
Fig. 5 is bottom self-locked four sides pyrometric cone inner core perspective view.
Fig. 6 schematic structural view of the invention.
Specific embodiment
Embodiment 1 manufactures absorbing material substrate and shell set square
First at 2 pieces with a thickness of 0.5mm fire prevention one layer of Chinese spy's HT-8200 glue of quartz plate external coating, by 0.2mm thickness Conductive polyester film is placed between 2 pieces of fire prevention quartz plate coated faces.Then composite material hot pressing in flat-bed press is placed on to consolidate Change.Pressure is 5.0MPa between 8.0MPa, and 80 DEG C of temperature, curing time is 20 minutes, forms flame-retarding wave-absorbing substrate (see figure 1) it, is made of the lamination layer structure of 2/ conductive film of flame-retardant layer, 1/ flame-retardant layer 1, composite base material is transferred in plate cutting machine and is cut Pyramidal plane substrate and rectangular bottom substrate at triangle, pyramidal plane substrate structure such as Fig. 2, two bevel edges of triangle are with assembly Tongue 41, assembled groove 42, there is bottom plate fixing groove 51 on substrate bottom edge；Bottom substrate structure such as Fig. 3, rectangular each side have solid with bottom plate Determine the auxiliary section 52 of the cooperation of slot 51.
Embodiment 2 manufactures absorbing material inner core shell and wave particle is inhaled in filling
First at 2 pieces with a thickness of 0.2mm fire prevention one layer of Chinese spy's HT-8200 glue of highland barley paper external coating, by 0.2mm thickness Conductive polyester film is placed between 2 pieces of fire prevention highland barley paper coated faces.Then composite material hot pressing in flat-bed press is placed on to consolidate Change.Pressure is 5.0MPa between 8.0MPa, and temperature 60 C, curing time is 30 minutes, forms flame-retarding wave-absorbing substrate.It will be compound Substrate, which is transferred in plate cutting machine, is cut into triangle, and bottom edge has self-locking bottom structure, and structure is shown in Fig. 4, Fig. 5.By inner core The synthesis of shell brush coating is assembled into three-dimensional triangular-cone, and conductive fire retardant polystyrene bead filling intermediate cam cone is internal, self-locking bear building-up Structure latching does not allow bead to be run out of except inner core shell.Bead filling weight amount multiplied by pyrometric cone internal volume and is squeezed by bead density Coefficient three is pressed to determine.Extrusion coefficient is preferably between 1.1 to 1.3.
3 flame resisting wave-absorbing material of embodiment composition
Outer housing substrate with tongue and groove is assembled into the outer housing 6 of three-dimensional triangular-cone, inside the outer housing 6 in filling Core 7 uses fireproof gum firm pasting between inner core 7 and outer housing, finally in the self-locking bottom of inner core outer housing bottom plate back cover, prevent Wave filling bead 8 is only inhaled to run out of from material internal.Its structure is shown in Fig. 6.
The nonflammable that the present invention is fabricated to is pyramid absorbing material since its flame-retardant layer is fire prevention quartz plate, highland barley paper of preventing fires High power lithium battery group heat-insulating fire-proofing material is contributed to, Fire retardant grade belongs to A1 grade.Furthermore internal filling punching is conductive fire-retardant Meeting volume expansion when by high-power radiation of styrene bead causes resistance value that great variety occurs, and microwave absorbing property is by wave-absorber Become wave transparent body.Bead can only melt, self-extinguishment is without naturally, outer housing is fire proofing material in addition, therefore it is inhaled wave and bears function Rate is better than nonwoven fabric base absorbing material, without any air cooler, replaces nonwoven fabric base absorbing material.
In addition to the implementation, the present invention can also have other embodiments.It is all to use equivalent substitution or equivalent transformation shape At technical solution, fall within the scope of protection required by the present invention.

Claims (8)

1. a kind of high power combined absorbing material of nonflammable broadband, including outer housing (6) and inner core (7), which is characterized in that institute Stating outer housing (6) is to inhale wave ignition resistant substrate by flame-retardant layer/conductive film/flame-retardant layer composite layer to constitute；The inner core is at least one A inner core-body (7), inner core-body (7) is interior to fill conductive fire retardant polystyrene small spherical particles (8)；Inner core-body bottom and outer housing bottom Inside is bonded into one.
2. the high power combined absorbing material of nonflammable broadband as described in claim 1, which is characterized in that flame-retardant layer material is Fire prevention quartz plate, fire prevention highland barley paper or epoxy fiberglass fiber plate.
3. the high power combined absorbing material of nonflammable broadband as described in claim 1, which is characterized in that flame-retardant layer is by preventing fires Quartz plate or epoxy fiberglass fiber plate are constituted, with a thickness of 0.2 between 0.5mm.
4. the high power combined absorbing material of nonflammable broadband as described in claim 1, which is characterized in that the inner core-body is Pyramid.
5. the high power combined absorbing material of nonflammable broadband as claimed in claim 4, which is characterized in that the pyramid is Four sides pyramid.
6. the high power combined absorbing material of nonflammable broadband as claimed in claim 5, which is characterized in that the four sides pyramid Body has self-locking bottom structure, and the substrate of four sides pyramid is that fire prevention highland barley paper is combined with conductive film.
7. the high power combined absorbing material of nonflammable broadband as described in claim 1, which is characterized in that the conduction is fire-retardant The diameter of polystyrene sphere is 1.5mm to 2mm, and sheet resistance value is 300 ohm/side between 500 ohm/side；Bead is close Degree is 50 to 70kg/m3。
8. the high power combined absorbing material of nonflammable broadband as described in claim 1, which is characterized in that outer housing is pyramid Shape is spliced by the substrate of shape by die-cutting, there is connection mating groove on the substrate.
CN201811140856.3A 2018-09-28 2018-09-28 Flame-retardant broadband high-power composite wave-absorbing material Active CN109353100B (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114929002A (en) * 2022-04-25 2022-08-19 南京航天波平电子科技有限公司 Single-cone light high-power wave-absorbing material and manufacturing method thereof

Citations (7)

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Publication number Priority date Publication date Assignee Title
JP2000059067A (en) * 1998-08-06 2000-02-25 Nitto Boseki Co Ltd Nonflammable radio wave absorbing body
JP2005197307A (en) * 2003-12-26 2005-07-21 Nippon Muki Co Ltd Solid electromagnetic wave absorption material
CN1744807A (en) * 2005-07-30 2006-03-08 大连理工大学 Method for manufacturing wave-absorber of resonant group with hole-closing structure
CN101552044A (en) * 2009-04-17 2009-10-07 南京南大波平电子信息有限公司 Electromagnetic wave absorbing material used for EMC electric wave darkroom and preparation method thereof
CN103163339A (en) * 2011-12-09 2013-06-19 鸿富锦精密工业（深圳）有限公司 Anechoic chamber
CN103408788A (en) * 2013-08-06 2013-11-27 南京洛普电子工程研究所 Flame-retardance wave-absorbing polystyrene foam material and preparation method thereof
CN104369498A (en) * 2014-11-11 2015-02-25 中国人民解放军国防科学技术大学 Composite wave absorbing wedge and preparation method thereof

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000059067A (en) * 1998-08-06 2000-02-25 Nitto Boseki Co Ltd Nonflammable radio wave absorbing body
JP2005197307A (en) * 2003-12-26 2005-07-21 Nippon Muki Co Ltd Solid electromagnetic wave absorption material
CN1744807A (en) * 2005-07-30 2006-03-08 大连理工大学 Method for manufacturing wave-absorber of resonant group with hole-closing structure
CN101552044A (en) * 2009-04-17 2009-10-07 南京南大波平电子信息有限公司 Electromagnetic wave absorbing material used for EMC electric wave darkroom and preparation method thereof
CN103163339A (en) * 2011-12-09 2013-06-19 鸿富锦精密工业（深圳）有限公司 Anechoic chamber
CN103408788A (en) * 2013-08-06 2013-11-27 南京洛普电子工程研究所 Flame-retardance wave-absorbing polystyrene foam material and preparation method thereof
CN104369498A (en) * 2014-11-11 2015-02-25 中国人民解放军国防科学技术大学 Composite wave absorbing wedge and preparation method thereof

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114929002A (en) * 2022-04-25 2022-08-19 南京航天波平电子科技有限公司 Single-cone light high-power wave-absorbing material and manufacturing method thereof

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