TW469283B - Method for manufacturing dielectric material for absorbing electromagnetic waves - Google Patents

Method for manufacturing dielectric material for absorbing electromagnetic waves Download PDF

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Publication number
TW469283B
TW469283B TW88119596A TW88119596A TW469283B TW 469283 B TW469283 B TW 469283B TW 88119596 A TW88119596 A TW 88119596A TW 88119596 A TW88119596 A TW 88119596A TW 469283 B TW469283 B TW 469283B
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Taiwan
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manufacturing
electromagnetic wave
wave absorbing
patent application
absorbing material
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TW88119596A
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Chinese (zh)
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Guo-Liang Chen
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Guo-Liang Chen
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Abstract

A method for manufacturing dielectric material comprising the steps of mixing polyurethane resin with carbon black, grinding the above mixed adhesive material by a grinding means, adding a suitable amount of carbon power, conductive fibers, and inorganic micro-balloon into the above ground material, stirring the above mixed material in a stirring means for a predetermined time for forming a thick unfinished product, coating or laminating the thick unfinished product over a mold or an object based on the requirement, and ventilating the above mole or object for forming a dried dielectric material. This dielectric material can absorb emitted electromagnetic waves for converting into heat dissipated. Thus, a possible harm to user or interference to other electric devices may be avoided. Further, the dielectric material may be coated on a military target or weapon for being invisible to enemy.

Description

SS_8BJ_19596 46 928 3SS_8BJ_19596 46 928 3

五、發明說明(1) 發明背景: 本發明係一種介番w雨 尤 指-種電磁波吸收Π:波吸收材料之製造方法, (―)收可村;其特殊之吸收機關 能 ,而無習用利用導電材=之能量90%〜99%轉變成熱 行等現象β 導電材枓阻隔所造成之反射、繞射及爬 先前技藝: 按’市面日常電器用品,如 電話手機、馬達及變壓哭箄 产站"‘,,、線電打動 出有害人體之電磁波,該電 ;. Πρ·Μ、曲紐π立 疋裡田電%〔electric _ 直交互作用之一種物理現象。 ,士自^為防止該電磁波對一電子電路所造成之干擾 或對人體之傷害,係使用一導電材料阻隔(shielding干擾 1,惟,由於該電磁波對導電體會造成一反射、繞射及爬 行(creeping )等現象,因此,習用利用該導電材料阻隔 之作法’並非有效地令該電磁波消失無蹤,且該電磁波依 然間接或直接地干擾該敏感 < 電子電路,甚至傷害人體, 故,若能發明一種電磁波吸收材料,以其特殊之吸收機關 (mechanism ),可將電磁波之能量90%〜99%轉變成熱 能,而無習用利用導電材料阻隔所造成之反射、繞射及爬 行等現象,如此,將是根本解決該電磁波所造成各種傷害 之方法。 發明綱要: 469283 案號 881195% 五、發明說明(2) 有鑑於上述傳統之 究與實驗,終於開發設 料之製造方法。 本發明之目的,係 之製造方法,透過該方 可將日常生活中一行動 波轉變成熱能,以解決 另,該具電雙極吸收材 回接收器,而達到隱形 料覆蓋於一武器或載倶V. Description of the invention (1) Background of the invention: The present invention is a method for producing electromagnetic waves, especially electromagnetic wave absorption. Π: a method for manufacturing wave absorbing materials, (―) Shuke Village; its special absorption mechanism can be used without practice. Use of conductive material = 90% ~ 99% of the energy to transform into hot travel, etc. β Conductive material 枓 block reflection, diffraction and crawling caused by the previous skills: Press' common daily electrical appliances on the market, such as phones, motors, and transformers.箄 Production station " ',, the electric line impresses electromagnetic waves harmful to the human body, and the electric power .. Πρ · Μ, Qu Niu π Lili Litian electricity% [electric _ a physical phenomenon of direct interaction. In order to prevent the electromagnetic wave from causing interference to an electronic circuit or harming the human body, a self-conducting material is used to shield it (shielding interference 1, but because the electromagnetic wave will cause a reflection, diffraction and crawling of the conductor ( creeping) and other phenomena, therefore, the practice of using the conductive material to block is not effective to make the electromagnetic wave disappear, and the electromagnetic wave still indirectly or directly interferes with the sensitive < electronic circuit, and even harms the human body. Therefore, if you can Invented an electromagnetic wave absorbing material. With its special absorption mechanism, it can convert 90% to 99% of the energy of electromagnetic waves into thermal energy, and it is not customary to use conductive materials to block reflection, diffraction, and crawling caused by such phenomena. , Will be the fundamental solution to the various injuries caused by this electromagnetic wave. Outline of the invention: 469283 Case No. 881195% V. Description of the invention (2) In view of the above-mentioned traditional research and experiments, the manufacturing method of the material is finally developed. Purpose of the invention Is a manufacturing method through which an action wave in daily life can be converted into thermal energy to solve The absorbent material has electrical bipolar back to the receiver, and a covering material to achieve invisible or carrier arms Ju

各種缺點,發明 計出本發明之介 在提供一種介電 法所製造出來之 電洁天線,所玫 電磁波對使用者 料亦可將雷達波 之目的,且軍事 表面,而達到欺 人經過長久努力研 電性電磁波吸收材 性電磁波吸收材料 電磁波吸收材料, 出有害人體之電磁 所造成之傷害, 吸收,令其無法返 單位可用該吸收材 敵僞裝之效果。 為使能對本發明之目的、形狀、構造及裝置特徵及其 功能,有更進一步的認識與瞭解,茲舉實施例配合圖示, 詳細說明如下: 詳細說明:Various shortcomings, the invention calculates that the present invention provides an electric clean antenna manufactured by the dielectric method. The electromagnetic waves can also be used for the purpose of radar waves for users, and the military surface. Electromagnetic wave absorbing materialElectromagnetic wave absorbing materialElectromagnetic wave absorbing material, which can harm the human body caused by electromagnetic damage, absorbs, making it impossible to return to the unit to use the effect of the absorbing material to camouflage. In order to enable a further understanding and understanding of the purpose, shape, structure, and device features and functions of the present invention, the embodiments are illustrated in conjunction with the drawings, and the detailed description is as follows: Detailed description:

.第6頁 請參閱第一、二圖所示,本發明係一種「介電性電磁 波吸收材料之製造方法」,該方涂主要係由至少一重量百 分比1.2~2,5%直徑約3〜5微米(micrometer)之炭粉 (carbon powder)、重量百分比〇.3~0.75%直徑約卜3毫 微米(nanometer)之黑煙(carbon black)、重量百分 比0. 05~0· 7%直徑約1〜3毫微米長約3~6毫弗(millimeter )之導電纖維(conductive fibers)等具電雙極之材料 元件,及重量百分比2 5〜3 5 %直徑約4 0 ~ 8 0微米比重約 0.2〜0.3耐壓大於lOOOpsi之無機微空心球(inorganic 46 928 3 __案號88119596_年月日 修正—--:-- 五、發明說明(3) microballoon)與重量百分比73. 5~62.5% ’free TDI (Tolyene diisocyanate)在0.3ppm以下之聚胺基甲酸§盲 樹月旨(polyurethane resin )戶斤組成0 其中係將前述材料中之聚胺基曱酸酯樹脂先與黑煙混 合攪拌均勻後,透過一研磨裝置10將該聚胺基甲酸酯樹脂 與黑煙所混合之具有黏性之混合液以3 0 0 0 ~ 6 0 0 0rpm高速研 磨均勻(如第一圖所示),本實施例中,該研磨裝置1 0係 分別為三個滚筒呈併排接觸而成,該三滾筒彼此間之滾筒 速度差約為1 : 2 : 3,俾藉由該三滾筒之速度差以研磨貼 附於三滾筒表面上之混合液,且於三滚筒之一側設有一刮 除元件11 ’將經過研磨後之混合液刮離三滾筒,該研磨裝 置1 0亦可由其它相當之研磨元件予以取代。 再者,於該經過研磨後之混合液中加入適量之炭粉、 導電纖維及無機微空心球,經一 30 0〜6 0 0rt>m低速高黏 度10101^〇〇(]〇〇叩5攪拌之攪拌裝置2 〇混鍊適當時間、如 第二圖所示)’即製成所需之漿狀半成品,本實施例中, 該攪拌裝置20為一中空筒21,該中空筒21中心設有一攪拌 =22,沿該中空筒21内壁設有一刮.除元件㈡’以順利進 之作用,俾攪拌時,該中空筒21係與攪拌軸22呈一 向慢速旋轉’以避免破壞其各成份。 以^此’將該半成品依實際需求如:強度或纖維多寡, 塗或積層之方式,覆蓋於一模具或被塗物之表面 曼,置於通風處,可以一自然乾燥或一 進行之,^,所得之乾焊固俨H I ‘, 乾輛方式 成品。β戶斤付之乾私固體片即為-電磁波吸收材料之. Please refer to the first and second figures on page 6. The present invention is a "manufacturing method of dielectric electromagnetic wave absorbing material". The square coating is mainly composed of at least one weight percent 1.2 ~ 2, and a diameter of about 3 ~ 5 米 (micrometer) carbon powder (carbon powder), weight percentage 0.3 ~ 0.75% diameter about 3 nanometer (nanometer) black smoke (carbon black), weight percentage 0.05 ~ 0 · 7% diameter about 1 to 3 nanometers long and about 3 to 6 millimeters of conductive fibers (conductive fibers) and other electric bipolar material elements, and weight percentage of 25 to 35 percent diameter about 40 to 80 micron specific gravity 5 ~ 62.5 Inorganic micro hollow spheres with a pressure resistance greater than 1000psi (inorganic 46 928 3 __Case No. 88119596_) % 'free TDI (Tolyene diisocyanate) is less than 0.3ppm. Polyurethane resin is composed of 0 kg. Among them, the polyurethane resin in the aforementioned material is first mixed with black smoke. After homogenization, the polyurethane resin is mixed with black smoke through a grinding device 10 The viscous mixed liquid is uniformly ground at a high speed of 300 to 600 rpm (as shown in the first figure). In this embodiment, the grinding device 10 is formed by three rollers in side-by-side contact. The speed difference between the three rollers is about 1: 2: 3. The speed difference between the three rollers is used to grind and mix the liquid mixture attached to the surface of the three rollers, and a scrape is provided on one side of the three rollers. Element 11 ′ scrapes the mixed liquid after grinding off the three rollers, and the grinding device 10 may be replaced by other equivalent grinding elements. Furthermore, an appropriate amount of carbon powder, conductive fiber and inorganic micro hollow spheres were added to the mixed solution after grinding, and the mixture was stirred at a low speed and high viscosity of 10101 ^ 〇〇 (] 〇〇 一 5 at a low speed of 300 ~ 600 rt. The stirring device 2 is mixed at the appropriate time in the chain, as shown in the second figure), that is, the required semi-finished product is made. Stirring = 22, a scraper is provided along the inner wall of the hollow cylinder 21 to remove the element ㈡ 'for smooth advancement. When stirring, the hollow cylinder 21 rotates slowly with the stirring shaft 22 to avoid damaging its components. In this way, the semi-finished product is coated or laminated on the surface of a mold or coated object according to actual needs, such as: strength or fiber amount, placed in a ventilated place, and can be naturally dried or carried out, ^ , The obtained dry welding solid 俨 ', the finished product by dry car. The dry solid tablets that β households pay are the ones of electromagnetic wave absorbing materials

469283 修正 案號 88119596 五、發明說明(4) 、 請參閱第三圖所示,#太欲DD 士 /,、本^ 係本發明之製造流程: (1 )首先,將前诚分u 土 &里陆,本旦迷材枓兀件所組成中之聚胺基甲酸酯 樹月日先…、煙初步里配、混合授拌均勾; (2 )透過研磨裝置1 〇將該聚胺基甲酸酯樹脂與黑煙所 混合之具有黏性之混合液高速研磨均勾; (3)再於該混合液中-+ Θ;Ε 甲一'•人I配,加入適量之炭粉、導 電孅維及無機微空心球; (4 )、”1低速ν點度授拌裝置2 G混鍊適當時間,製成漿 狀之半成品; (5)將該半成品依實際需求以刷塗或積層之方式,覆 蓋於模具或被塗物之表面; (6 )呐,以自然或加熱強制之方式進行乾燥,該乾燥 固體片即為一電磁波吸收材料之成品。 如此,係可將該具電雙極吸收材料應用於一行動電話 中之天線(圖中未示)± ’俾使用者耳朵在與天線最接近 處’可H由該電磁波吸收材料將電磁波轉變成&能,以解 決電磁波對使用者所造成之傷害,而該電磁波吸收材料之 吸收原理係‘外加異動電場(alternating electric f ield )作用於介電材料(dielectric)時,其 表面因電雙極之交互震盪(〇Sciluu〇n 〇f the dipoles with field),將有感應交互電流(alternating displacen^nt)產生,跟據高斯定率: V · D = ;〇 其中▽是微分向量算子(nabla) 是電通量密度 (the electric flux density ),單位(c/m2) ; ^〇是469283 Amendment No. 88119596 V. Description of the invention (4) Please refer to the third figure, # 太 欲 DD 士 /, and ^ are the manufacturing process of the present invention: (1) First, divide the former sincerely into the soil and the amp Lilu, Polyurethane tree in the composition of the obscured material of Bendan ...., the initial blending of tobacco, mixing and blending; (2) through the grinding device 10 The viscous mixed liquid mixed with the urethane resin and black smoke is milled at a high speed; (3) Then in the mixed liquid-+ Θ; Ε 甲 一 '• 人 I compound, add an appropriate amount of carbon powder, Conductive concrete and inorganic micro-hollow spheres; (4), "1 low-speed ν point-degree mixing device 2 G mixing chain for appropriate time to make a slurry semi-finished product; (5) the semi-finished product can be brush-coated or laminated according to actual needs In this way, it covers the surface of the mold or the object to be coated; (6) Now, it is dried in a natural or heating-forced manner, and the dried solid sheet is the finished product of an electromagnetic wave absorbing material. Extremely absorbing material applied to an antenna (not shown) in a mobile phone You can use this electromagnetic wave absorbing material to transform the electromagnetic wave into & energy to solve the harm caused to the user by the electromagnetic wave, and the principle of absorption of the electromagnetic wave absorbing material is that an additional electric field (alternating electric field) acts on the medium In the case of electrical materials (dielectrics), the surface will be caused by alternating interaction currents (〇Sciluu〇n 〇f the dipoles with field), according to the Gaussian rate: V · D =; 〇 where ▽ is the differential vector operator (nabla) is the electric flux density (c / m2); ^ 〇 是

46 9 28 3 案號8811阽阽 曰 i 五、發明說明(5) 電荷電密度( (c/m3 ) ° 由高斯定 電磁波轉變.成 (dielectric 象。 另,該吸 收·器,而達到 蓋於一武器或 綜上所述 施例而已,對 行各種等效之 圍。 修正 the electric charge density 單也 率可知,該感應交互電流;之互相抵消, 熱能’此即為介電材料之介電損失 '使 1 oss ),亦是該材料對電磁波之吸收現 收材料亦可將雷達波吸收,令其無 隱形之目的,且軍事單位可用該吸收接 載倶表面,而達到欺敵僞裝之效果。覆 本發明僅用以舉例說明本發明之一可行實 熟心該項技藝之人士,當可對其細部形狀進 變化例,惟其均應包括在本發明之精神及範46 9 28 3 Case No. 8811 阽 阽 阽 阽 i. 5. Description of the invention (5) The electric charge density ((c / m3) ° is transformed from a Gaussian electromagnetic wave into a (dielectric image. In addition, the absorber reaches the cover in A weapon or a combination of the above-mentioned embodiments is just the equivalent range. Correct the electric charge density to see that the inductive interaction current; the mutual cancellation, thermal energy. This is the dielectric loss of the dielectric material. 'Making 1 oss') is also the material's absorption of electromagnetic waves. The received material can also absorb radar waves, making it invisible, and military units can use this absorption to load the surface of puppets to achieve the effect of deceiving the enemy. The present invention is only intended to illustrate one of the people skilled in the art who is skilled in the art, and can change the details of the shape, but they should all be included in the spirit and scope of the present invention.

第9頁 4 6 9 28 3 案號 88119596 _Ά 修正 圖式簡單說明 圖示之簡單說明: 第一圖係為本發明之研磨裝置示意圖。 第二圖係為本發明之攪拌裝置示意圖。 第三圖係為本發明之實現流程方塊示意圖 主要元件圖號說明: 研磨裝置…… ……10 , 剖除元件 ......11 '23 攪拌裝置…… ……20 , 中空筒 ......21 攪拌轴 …… ……22Page 9 4 6 9 28 3 Case No. 88119596 _Ά Amendment Brief description of the diagram Brief description of the diagram: The first diagram is a schematic diagram of the grinding device of the present invention. The second figure is a schematic diagram of a stirring device of the present invention. The third figure is a block diagram of the realization flow chart of the present invention. The main components are illustrated by the drawing numbers: Grinding device ...... 10, cut-away components ...... 11 '23 Stirring device ...... 20, hollow cylinder .. .... 21 Mixing shaft ......... 22

第10頁Page 10

Claims (1)

修正 號 881195^ 1. -種介電性電磁波吸收材料之製造方法,該方法係 --6 2. 5 %與黑煙依重量百分出 0.3-0.75% 、混合傳 > — ~- 視件均勻後,透過一研磨裝置,將其所 混合之具有黏性一之混合液^3QQ0-6Q00rnm高速研磨均甸, 再=該混合液:二次量配,加入一重詈百分比丨.2~2.5% 之厌粉、一 -0,7¾之導電纖維及一重量百 —fc25~35 %之餐埤微空心球,經一 3 0 0〜6 0 0rpm低速高黏 ^ 5 0 00 0 - 1 QQOOQcP'SJU^攪拌裝置,混合適當碡"間,即 製成所需之I狀半成品,再將該半成品依實際需求覆蓋於 一模具或一被塗物之表面,再行乾燥後成為一乾燥固體 片,即為一電磁波吸收材料之成品。 2. 如申請專利範圍第!項所^之介霉性電碟波!收材 料之製造方法’其中該研摩裝置係分別為三個滾筒呈併排 接觸而成’該号舉.筒彼此間之滚筒+度分別具一.速度差, 俾藉由該速度i以研麾貼附於滾筒表面上之滿合液,且於 三滾筒之一側設有一刮除元件,可將經過研磨後之混合液 刮離。 3. 如申請專利範圍第1項所述之介電性電礴疼吸彳欠材 料之製造方法,其中該攪拌裝置為一中空筒,該中空筒中 —..._ 心設有一攪拌轴,沿該中空筒内壁埤.有一刮除元件,以順 .· . 利進行擾拌之作用,且中空筒係與授拌軸呈一反向慢速旋 轉,以避免破壞其各成份。 4 ·如申請專利範圍第1項所述之介電性賓磁波吸收材 料之製造方法,其中該半成品可依需求強度或纖維多募,Amendment No. 881195 ^ 1.-A method of manufacturing a dielectric electromagnetic wave absorbing material, the method is-6. 2.5% and black smoke 0.3-0.75% by weight, mixed transmission > — ~-Visual After homogenization, through a grinding device, the mixed solution with viscous one ^ 3QQ0-6Q00rnm high-speed grinding Jundian, and then = the mixed solution: dosing twice, add a percentage of heavy weight 丨. 2 ~ 2.5% I hate powder, a -0,7¾ conductive fiber and a weight of one hundred-fc25 ~ 35% of the meal 埤 micro hollow ball, after a low speed and high viscosity of 3 0 0 ~ 6 0 0 rpm ^ 5 0 00 0-1 QQOOQcP'SJU ^ Agitating device, mix appropriately, and make the required I-shaped semi-finished product, and then cover the surface of a mold or a coated object with the semi-finished product according to actual requirements, and then dry it into a dry solid piece. It is the finished product of an electromagnetic wave absorbing material. 2. If the scope of patent application is the first! The Institute ^ of the moldy disc wave! The manufacturing method of receiving materials 'where the grinding and rubbing device is formed by three rollers in side-by-side contact.' This is the example. The rollers + degrees between the barrels have a speed difference. The full liquid is attached to the surface of the roller, and a scraping element is provided on one side of the three rollers, which can scrape off the mixed liquid after grinding. 3. The manufacturing method of the dielectric electric pain absorption material described in item 1 of the scope of the patent application, wherein the stirring device is a hollow cylinder, and a stirring shaft is arranged in the hollow cylinder, along The inner wall of the hollow tube is provided with a scraping element for smooth mixing, and the hollow tube and the mixing shaft rotate in a reverse and slow speed to avoid damaging its components. 4 · The manufacturing method of the dielectric guest magnetic wave absorbing material as described in item 1 of the scope of the patent application, wherein the semi-finished product can be recruited according to the required strength or fiber, 469283 ___案號 88119596__车月曰___梦正___:-:_ 六、申請專利範圍 以刷塗或積層之方式覆蓋於模具或被塗物之表面上。 5.如申請專利範圍第1項所述之介電性電磁波吸收材 .料之製造方法,其中該乾燥係可以自然或加熱強制之方式 進行乾燥。 专.如申請專利範圍第1、2、3、4或5項.所述之介電性 電磁波吸收材料之製造方法,其中該樹脂可為,free TDI (Tolyene diisocyanate)在〇.3ppm以下之聚胺基甲酸酯 樹月旨(polyurethane resin )之材料元件° 2.如申請專利範圍第1、2、3、4或5項所述之介電性 電磁波吸收材料之製造方法,其中該無機微空心球可為一 直」f 40〜80微米比重0. 2-0 耐壓大於100〇psi之材料元 件。 如申請專利範圍第1、2、3、4或5項所述之介電性 電磁波吸收材料之製造方法,其中該黑煙可為,直徑卜3 .毫从未之材料元件。 豆.如申請專利範圍第1、2、3、4或5項所述介電性 電磁波吸收材料之製造方法,其中諒炭粉可為〆直徑3〜5 微米之材料元件。 li.如申請專利範圍第1、2、3、4或5項所述之介電性 電磁'波吸唉材料孓擊请方..法,其中該導電纖罐可.為一直徑 3毫微求長3~6毫米之材料元件。 11.如申請專利範圍第§項所述之介電性電磁波吸收材 料之製造方法,其中該材料為一具電雙極之元件。469283 ___ Case No. 88119596__Che Yueyue _ Mengzheng ___:-: _ VI. Application for Patent Cover the mold or the surface of the coating by brushing or laminating. 5. The manufacturing method of the dielectric electromagnetic wave absorbing material according to item 1 of the scope of the patent application, wherein the drying can be performed by natural or heating forcing. The manufacturing method of the dielectric electromagnetic wave absorbing material according to item 1, 2, 3, 4 or 5 of the scope of patent application, wherein the resin may be a polymer having free TDI (Tolyene diisocyanate) of 0.3 ppm or less Material element of urethane resin (polyurethane resin) ° 2. A method for manufacturing a dielectric electromagnetic wave absorbing material as described in the scope of patent application No. 1, 2, 3, 4 or 5, wherein the inorganic micro The hollow sphere may be a material element with a specific gravity of 0.2 to 40 microns and a pressure resistance greater than 100 psi. The manufacturing method of the dielectric electromagnetic wave absorbing material according to item 1, 2, 3, 4 or 5 of the scope of the patent application, wherein the black smoke may be a material element having a diameter of 3.0 mm or less. Bean. The manufacturing method of the dielectric electromagnetic wave absorbing material according to item 1, 2, 3, 4 or 5 of the scope of patent application, wherein the carbon powder can be a material element with a diameter of 3 to 5 microns. li. The dielectric electromagnetic wave absorbing material as described in item 1, 2, 3, 4 or 5 of the scope of the patent application shall be used to strike the request method, wherein the conductive fiber can may be a diameter of 3 nanometers. Find material components with a length of 3 ~ 6mm. 11. The manufacturing method of the dielectric electromagnetic wave absorbing material according to the item § of the patent application scope, wherein the material is an electric bipolar element. 第12頁Page 12
TW88119596A 1999-11-09 1999-11-09 Method for manufacturing dielectric material for absorbing electromagnetic waves TW469283B (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018214681A1 (en) * 2017-05-26 2018-11-29 洛阳尖端技术研究院 Epoxy resin wave-absorbing composite material and preparation method therefor

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018214681A1 (en) * 2017-05-26 2018-11-29 洛阳尖端技术研究院 Epoxy resin wave-absorbing composite material and preparation method therefor
CN108929518A (en) * 2017-05-26 2018-12-04 洛阳尖端技术研究院 A kind of epoxide resin wave-absorbing composite material and preparation method
US11279822B2 (en) 2017-05-26 2022-03-22 Luoyang Institute Of Cutting-Edge Technology Epoxy resin wave-absorbing composite material and preparation method thereof
CN108929518B (en) * 2017-05-26 2022-11-25 洛阳尖端技术研究院 Epoxy resin wave-absorbing composite material and preparation method thereof

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