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Journal articles on the topic 'Stealth material'

Author: Grafiati
Published: 1 June 2024
Last updated: 31 July 2025

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1

Luo, Ziyin, Qizheng Zhou, and Peng Guo. "Microstructure Design and Performance Optimization of Constant Modulus Pentamode Materials Acoustic Cloak." Crystals 12, no. 11 (2022): 1572. http://dx.doi.org/10.3390/cryst12111572.

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Underwater acoustic stealth has great scientific research value. According to acoustic coordinate transformation theory, the acoustic stealth cloak based on pentamode materials can realize underwater broadband acoustic stealth. However, due to the correlation between the density and modulus of pentamode materials and the changes in the parameters of each layer of the acoustic stealth cloak, a large amount of structural optimization work is required for the pentamode material to meet the specific parameter requirements, which significantly increases the difficulty of the pentamode acoustic stea
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2

Zhang, Zhixun, Mingyang Yang, Yibo Zhang, and Ming Zhou. "Research and Application of Terahertz Response Mechanism of Few-Layer Borophene." Nanomaterials 12, no. 15 (2022): 2702. http://dx.doi.org/10.3390/nano12152702.

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The terahertz stealth and shielding performance of a new type of two-dimensional material, borophene, has been studied theoretically and experimentally. Studies have shown that borophene materials have good terahertz stealth and shielding properties. First-principles calculations show that compared with single-layer borophene, few-layer borophene has good terahertz stealth and shielding performance in the range of 0.1~2.7 THz. In the range of 2~4 layers, the terahertz stealth and shielding performance of few-layer borophene increases with the increase of the number of layers. The finite elemen
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3

Lu, Xinjian, Ruige Su, Guiyong Chen, Wenxin Li, Misheng Liang, and Rui You. "Stealth Materials Based on Laser-Induced Graphene: Developments and Challenges." Nanomaterials 15, no. 8 (2025): 623. https://doi.org/10.3390/nano15080623.

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Laser-induced graphene (LIG) has become a promising stealth material due to its excellent electromagnetic loss characteristics in the terahertz and microwave bands (2–18 Ghz) and the advantages of low-cost large-scale manufacturing. With the rapid advancement of electromagnetic detection technologies toward multispectral and high-dynamic-range capabilities, there is an increasing demand for LIG-based stealth materials with superior absorption performance. The synergistic design of functional material doping and structural configurations has been identified as a critical approach to achieve hig
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4

Wu, Yacong, Jun Huang, Mingxu Yi, and Chaopu Zhang. "Simulation of active cancellation system based on N-order SSC algorithm." Aircraft Engineering and Aerospace Technology 91, no. 7 (2019): 949–60. http://dx.doi.org/10.1108/aeat-08-2017-0190.

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Purpose The purpose of this paper is to introduce the theoretical basis of N-order spectral spreading-compressing (SSC) frequency shift interference algorithm and expand it to active cancellation. An active cancellation simulation and verification system based on N-order SSC algorithm is established and carried out; simultaneously, the absorbing material coating stealth simulation of two kinds of thickness is carried out to compare the stealth effect with active cancellation system. Design/methodology/approach The active cancellation method based on N-order SSC algorithm is proposed based on t
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5

Irani, Afshad J., and Le (Emily) Xu. "Do stealth restatements convey material information?" Accounting Research Journal 24, no. 1 (2011): 5–22. http://dx.doi.org/10.1108/10309611111148751.

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6

Liu, Hua Wu, Fan Jie Chu, Zong Bin Yang, and Hong Ming Dai. "Igneous Fiber Reinforced Stealthy Armor for Submarine." Advanced Materials Research 332-334 (September 2011): 1955–58. http://dx.doi.org/10.4028/www.scientific.net/amr.332-334.1955.

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Abstract: Igneous gem is a modified mineral glass without devitrification during processing, which is far stronger than traditional basalt materials comprising both glass and crystal phases. Fiber made by igneous gem is an ideal reinforcement for the armor of submarine, with advantages such as infrared stealth (thermal insulation), sonar stealth (anti-vibration), radar stealth (transparent to radar wave), heavy duty anticorrosion, bullet-proof (theoretical tensile strength 15,000MPa), fire resistant (working temperature 910 oC) and ultralow temperature resistant (working temperature up to -269
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7

Zhang, Peng, Shuang Zhao, Guobing Chen, et al. "Preparation of Fibrous Three-Dimensional Porous Materials and Their Research Progress in the Field of Stealth Protection." Nanomaterials 14, no. 12 (2024): 1003. http://dx.doi.org/10.3390/nano14121003.

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Intelligent and diversified development of modern detection technology greatly affects the battlefield survivability of military targets, especially infrared, acoustic wave, and radar detection expose targets by capturing their unavoidable infrared radiation, acoustic wave, and electromagnetic wave information, greatly affecting their battlefield survival and penetration capabilities. Therefore, there is an urgent need to develop stealth-protective materials that can suppress infrared radiation, reduce acoustic characteristics, and weaken electromagnetic signals. Fibrous three-dimensional poro
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8

Xu Wen-Lan, Zhang Shuan-Qin, and Xu Yi. "The design of visible light stealth material." Acta Physica Sinica 53, no. 9 (2004): 3215. http://dx.doi.org/10.7498/aps.53.3215.

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9

S.P.Mishra, G. Nath, and P. Mishra. "Synthesis and analysis of microwave stealth material." Materials Today: Proceedings 24 (2020): 585–90. http://dx.doi.org/10.1016/j.matpr.2020.04.312.

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10

Shi, Tao, Zhiheng Zheng, Huan Liu, Dezhen Wu, and Xiaodong Wang. "Configuration of Multifunctional Polyimide/Graphene/Fe3O4 Hybrid Aerogel-Based Phase-Change Composite Films for Electromagnetic and Infrared Bi-Stealth." Nanomaterials 11, no. 11 (2021): 3038. http://dx.doi.org/10.3390/nano11113038.

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Electromagnetic (EM) and infrared (IR) stealth play an important role in the development of military technology and the defense industry. This study focused on developing a new type of multifunctional composite film based on polyimide (PI)/graphene/Fe3O4 hybrid aerogel and polyethylene glycol (PEG) as a phase change material (PCM) for EM and IR bi-stealth applications. The composite films were successfully fabricated by constructing a series of PI-based hybrid aerogels containing different contents of graphene nanosheets and Fe3O4 nanoparticles through prepolymerizaton, film casting, freeze-dr
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11

Zhang, Kunyuan, Delian Liu, and Shuo Yang. "Design Method of Infrared Stealth Film Based on Deep Reinforcement Learning." Photonics 12, no. 1 (2025): 67. https://doi.org/10.3390/photonics12010067.

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With the rapid advancement of infrared detection technology, the development of infrared stealth materials has become a pressing need. The study of optical micro/nano infrared stealth materials, which possess selective infrared radiation properties and precise structural features, is of significant importance. By integrating deep reinforcement learning with a multilayer perceptron, we have framed the design of radiation-selective films as a reinforcement learning problem. This approach led to the creation of a Ge/Ag/Ge/Ag multilayer micro/nano optical film that exhibits infrared stealth charac
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12

Yayun Cheng, Yayun Cheng, Fei Hu Fei Hu, Feng He Feng He, Liang Wu Liang Wu, and and Xiaoqin He and Xiaoqin He. "Millimeter-wave emission characteristics of bilayer radar-infrared compound stealth material." Chinese Optics Letters 14, no. 6 (2016): 062802–62806. http://dx.doi.org/10.3788/col201614.062802.

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13

Sun, Hui Min, Ming Xue Zhang, and Zhao Zhan Gu. "Study on Radar Absorbing Properties of Impure Sm2O3/Acrylate Coatings." Advanced Materials Research 849 (November 2013): 242–47. http://dx.doi.org/10.4028/www.scientific.net/amr.849.242.

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The development and application of the stealth material technology are one of the key factors to develop the stealth technology. The painting type of stealth material has the properties of simply process, usableness and easy regulate, so it has been extensive concern. In the paper the impure Sm2O3/acrylate coatings were prepared using Sm2O3 and carbon nanotubes powder and their microstructure was studied by SEM. Furthermore it was studied on radar absorption properties in 1-18GHz and mechanics properties of the coatings. It is proved that the absorption effect of the coatings is the best when
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14

Lu, Shaoze, Jun Huang, and Mingxu Yi. "Study on zonal coating design of absorbing material for a stealth helicopter." Aircraft Engineering and Aerospace Technology 92, no. 7 (2020): 1011–17. http://dx.doi.org/10.1108/aeat-01-2020-0004.

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Purpose By reducing the coating thickness of the weak scattering source, the coating weight of the absorbing material can be reduced by 35% with little effect on the RCS. Design/methodology/approach To alleviate the weight-increasing problem caused by a large number of coating of absorbing materials, a method for zonal coating of absorbing materials for a stealth helicopter was proposed. By appropriately reducing the thickness of the coating at the secondary scattering locations, the amount of coating used is significantly reduced. Findings Compared with the full-coated, the zonal coating sche
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15

Wang, Yichen, Xiujuan Reng, Dong Wang, Haifeng Liu, and Yu Wu. "Minimizing Color Difference in AAO-Based Coatings for Urban Camouflage." Nanomaterials 15, no. 12 (2025): 890. https://doi.org/10.3390/nano15120890.

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We explored anodic aluminum oxide (AAO) stealth materials combining low infrared emissivity and visible structural coloration through multi-parameter modulation. Using DC ion gold sputtering and UHV magnetron chromium sputtering, we successfully prepared an AAO stealth material with high-saturation visible structural coloration and low infrared emissivity (ε < 0.17). Quantitative evaluation based on the CIE Lab color difference model indicated that the gold-coated samples had high matching accuracy with PANTONE standard colors (ΔEab* < 1.6). The chromium-coated samples had slightly lower
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16

Lu Ai-Jiang. "SiBN ceramics, a stealth material at high temperature." Acta Physica Sinica 62, no. 21 (2013): 217101. http://dx.doi.org/10.7498/aps.62.217101.

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17

Nisa, Dinda Khoirun, Yayat Ruyat, Mas Ayu Elita Hafizah, and Wahyu Widanarto. "Modification of Rice Husk-based Activated Charcoal as Microwave Absorbing Material." International Journal of Progressive Sciences and Technologies 46, no. 2 (2024): 09. https://doi.org/10.52155/ijpsat.v46.2.6525.

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Stealth technology is one of the technologies being developed to eliminate RADAR traces from the enemy. The spectrum used in this technology is in the microwave range (8-12 GHz). RAM (Radar Absorbing Material) is one of the techniques that can be used in the design of stealth technology. One material that has the potential to be used as RAM is activated charcoal as a dielectric material. In the manufacture of activated charcoal, a chemical activation method is used with an activator in the form of 5 M HCl to obtain good porosity properties in charcoal. Modification of active charcoal was also
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18

Craig Bettenhausen. "H2MOF comes out of stealth with hydrogen storage material." C&EN Global Enterprise 102, no. 24 (2024): 15. http://dx.doi.org/10.1021/cen-10224-buscon3.

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19

Lee, Yongwoo, Injoong Chang, Juyeong Nam, Hyung Mo Bae, and Hyung Hee Cho. "Analysis on Infrared Stealth Performance of Metal Nano-coating on Radome Surface." Journal of the Korea Institute of Military Science and Technology 25, no. 3 (2022): 251–58. http://dx.doi.org/10.9766/kimst.2022.25.3.251.

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Infrared stealth technology used in aircraft is applied to reduce the infrared signal by controlling surface temperature and emissivity using internal heat sink, low emissivity material or metamaterial. However, there is one part of the aircraft where the use of this technology is limited, and that is the radome. Especially, radome should have transmittance for the specific radio frequency, therefore, common stealth technology such as emissivity control surfaces cannot be applied to radome surface. In this study, we developed metal nano-coating for infrared stealth which is applicable to radom
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20

Jang, Jae-Kyeong, Jong-Min Hyun, Dae-Sung Son, and Jung-Ryul Lee. "Nondestructive and electromagnetic evaluations of stealth structures damaged by lightning strike." Journal of Intelligent Material Systems and Structures 30, no. 17 (2019): 2567–74. http://dx.doi.org/10.1177/1045389x19862366.

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Stealth technology is very important for the survival of military aircraft. A stealth aircraft structure has both electromagnetic and mechanical functions. Lightning can cause failure on both the points. In this study, we claim that the stealth structure should be evaluated nondestructively and electromagnetically, and we propose a method for full-field evaluations of both the functions. First, a radar absorbing structure was designed and fabricated with stealth capability in the X-band. The radar absorbing structure consisted of a carbon nanotube layer (glass/epoxy dispersed with multiwalled
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21

Fahri, Mirad, Patricya Inggrid Wilhelmina Bolilanga, Gunaryo Gunaryo, Elva Stiawan, and Tedi Kurniadi. "Exploring the Potential of Carbon-based Radar Absorbing Material Innovations." Indonesian Journal of Chemical Studies 3, no. 2 (2024): 72–81. https://doi.org/10.55749/ijcs.v3i2.56.

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This review explored the potential of carbon-based radar-absorbing materials (RAM), which had gained significant attention due to their superior properties and performance. In response to the growing demand for stealth technology in the military and civilian sectors, traditional radar-absorbing materials encountered limitations: weight, cost, and effectiveness. Carbon-based materials, such as carbon nanotubes, graphene, and various composites, offered lightweight, flexible, and tunable solutions that enhanced electromagnetic wave absorption across a wide frequency range. This paper examined th
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22

Nadiyyah, Khoirotun, Dwi Wahyu Hardiyanto, Dwi Irma Aprilia, Rizky Firmansyah, Nurul Amaliya Triyuliana, and M. Zainuri. "ANALYSIS OF ACTIVATED CARBON (PETUNG BAMBOO)/LATEX COMPOSITE AS X-BAND WAVE-ABSORBING MATERIAL." JOURNAL ONLINE OF PHYSICS 8, no. 2 (2023): 70–76. http://dx.doi.org/10.22437/jop.v8i2.23851.

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In maintaining the sovereignty of a country, especially in border regions was needed defense tools that had the latest technology, such as stealth technology. Stealth technology was applied to military ships or aircraft so that they could not be detected by Radio Detection and Ranging. Stealth technology in this research was realized by coating the ship's or aircraft's body using RAM (Radar Absorbing Material). RAM could be composed of dielectric materials, such as activated carbon. The activated carbon was synthesized from Dendrocalamus Asper. This research aimed to analyze the proper of comp
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23

Mishra, Monika, Avanish Pratap Singh, Bhanu Pratap Singh, and S. K. Dhawan. "Performance of a nanoarchitectured tin oxide@reduced graphene oxide composite as a shield against electromagnetic polluting radiation." RSC Adv. 4, no. 49 (2014): 25904–11. http://dx.doi.org/10.1039/c4ra01860e.

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24

Brandon, Mark A. ""Scientific Work Sanctions Everything": Czech Skull Hunters in Alaska." Ostrava Journal of English Philology 16, no. 2 (2024): 91–107. https://doi.org/10.15452/ojoep.2024.16.0016.

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This article describes how the racial worldview of Aleš Hrdlička (1869-1943) shaped his unethical treatment of Native Americans during his expeditions to Alaska between 1926 and 1937. One of the maim aims of the trips was to dig up and steal Native American skeletons, by stealth if necessary. As a globally lauded anthropologist from one of America’s premier scientific institutions, Hrdlička’s devotion to scientific progress provided the motivation behind his behavior. In his scientific philosophy, humans (and their bones) were nothing more than material, and all individuals were best classifie
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25

Zhang, Yuhui, Huaiyu Dong, Chen Yu, Zhichen Wang, and Yixing Huang. "Metastructure based broadband structural stealth with material-structure-function integration." Composites Science and Technology 253 (July 2024): 110661. http://dx.doi.org/10.1016/j.compscitech.2024.110661.

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26

Wu, Wen Ting, Yi Ren, and Heng Yu Zhao. "Research on Application of Plant Structure Bionics in Building Materials." Key Engineering Materials 480-481 (June 2011): 904–7. http://dx.doi.org/10.4028/www.scientific.net/kem.480-481.904.

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Since ancient times, nature has been the source of various principles of science and technology and major invention. The features of plant structure bionics, history of application of plant structure bionics in building sector and its applications in high intensity composite material bionics, self-cleaning effect bionics, intelligent information and bionic control, stealth materials and biomimetic materials bionics and other building materials were demonstrated in this paper. Issues for further research were also discussed to provide more inspiration and reference for further innovation.
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Luo, Zhong, and Yue Dong Shi. "The Acoustic Character Analysis of the Sandwich Composite Structure with Cavum in Water Backing." Applied Mechanics and Materials 291-294 (February 2013): 2581–85. http://dx.doi.org/10.4028/www.scientific.net/amm.291-294.2581.

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Sandwich composite is a new structure of acoustic stealth structure, implementing both loading and acoustic stealth. The syntony of cavum can improve the absorption effect in low frequency. This paper uses FEM analysis method, which has been proved theoretically with typical cases and experimental results, to analyze the effect of sandwich material parameter and cavum physical in water backing. The reflection and absorption coefficient in different module, poisson ratio, and density of sandwich, and different depth, location, diameter, interval, and shape of cavum are analyzed. It can support
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Jia, Zhen, Yan Ming Liu, Tao Su, and Xiao Wu. "Performance Comparison of the Hexagon and the Overexpanded Honeycomb." Key Engineering Materials 999 (December 16, 2024): 49–53. https://doi.org/10.4028/p-3t3fjp.

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With the development of radar-detecting technology, stealth technology is important for military weapons and equipment. As a typical structural stealth material, wave absorption honeycomb has a wide range of application prospects and research value. The light and high absorption wave absorption honeycomb that uses electromagnetic-modified aramid paper as a raw material has the advantages of light density and good absorption performance, making it suitable for the lightweight requirements of the new equipment. Here, the electromagnetic-modified aramid was the raw material of the honeycomb. The
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29

Zhang, Wen Cheng, Sui Hua Zhou, and An Lin Jiang. "Study on the Application of Viscoelastic Material in Sound Absorption Structure Model." Advanced Materials Research 217-218 (March 2011): 341–46. http://dx.doi.org/10.4028/www.scientific.net/amr.217-218.341.

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Study on new absorption materials is important to the sound stealth of targets underwater. The simpler formulae of calculating multiple-layer absorption model is educed with transferring matrix. By numerical simulating, the relation between model’s acoustic characteristics and material parameters of each layer is provided.The study shows that a better performance is acquired when material Young’s modulus changed dynamically with frequency by a certain rule. On these basises, simulation contrast of the absorbing performances between styrene-butadiene rubber(SBR) and Spray Poiyurea Elastomer(SPU
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30

Rasendriya, Anselmo Bima, Andri Hardiansyah, Gita Resty Amalia, et al. "Fabrication and Characterization of Graphene Nanoplatelets/Zinc Oxide Nanocomposites as a Military Radar Absorbing Material." Indonesian Journal of Chemical Studies 4, no. 1 (2025): 28–34. https://doi.org/10.55749/ijcs.v4i1.69.

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Stealth aircraft have the capability to intercept radar waves. One common technique involves the use of radar-absorbing materials (RAMs). This study focused on the synthesis of advanced lightweight functional materials derived from advanced carbon and semiconductor compounds for microwave absorbing through mechanical homogenization. Graphene nanoplatelets (GNP) and Zinc Oxide (ZnO) possess excellent dielectric and magnetic loss capability due to their thermal conductivity, small particle size, large surface area, disordered structure, and lightweight nature. The GNP and ZnO were developed as a
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31

Dash, Akshay K., Priyanka P. Singh, and Ganeswar Nath. "Estimation of reflection loss in a microwave absorbing material based on the laser speckle method." Laser Physics Letters 20, no. 8 (2023): 086004. http://dx.doi.org/10.1088/1612-202x/ace2b3.

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Abstract Microwave absorption has received much attention due to its prospective implementation in the extenuation of electromagnetic interference (EMI). The effectiveness of any microwave absorbing material (MAM) is demonstrated by its dielectric dependent properties, such as electric permittivity, magnetic permeability and computed parameters like tangent loss, attenuation and reflection loss (RL) etc. RL is one of the special features of MAMs, allowing the quality of a MAM to be identified by its surface condition and the composition of the fabricated material. As a surface phenomenon, RL d
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Tamadate, Yuka, Hideki Maruyama, Katsunori Aoki, Takashi Ozawa, and Haruo Sorimachi. "Novel Backside Grinding and Laser Dicing Process for Cu Pillar Generated Low-k Wafer." International Symposium on Microelectronics 2013, no. 1 (2013): 1–4. http://dx.doi.org/10.4071/isom-2013-wp54_shinko_late.

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One of the challenges in using very thin die, which is needed in thin package, is how to dice it cleanly without chipping, delamination of fragile low-k insulation material and contamination of bonding pads. A narrow scribe line is also highly preferable for high wafer area utilization. The authors developed a novel "grooving and stealth laser process" to satisfy all of these criteria. Grooves are formed on test pads in die sawing area by a grooving laser beam, and then a stealth laser beam is focused into the bulk silicon, causing defect regions in the bulk silicon. Dicing tape is expanded so
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33

Zhang, Han, Zekui Zhang, and Baoyi Li. "Design of Stealth Bulletproof Material Based on Sub-Wavelength Absorbing Structure." IOP Conference Series: Materials Science and Engineering 774 (March 27, 2020): 012097. http://dx.doi.org/10.1088/1757-899x/774/1/012097.

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Liu, Yang, Jianbang Zhou, Qi Chang, Ji Liu, Jinzu Ji, and Li-Hua Shao. "Transparent and electrically tunable electromagnetic wave absorbing metamaterial." Applied Physics Letters 120, no. 9 (2022): 094101. http://dx.doi.org/10.1063/5.0083047.

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Electromagnetic protection materials are widely used in both military and civilian fields. However, the limited wave-absorbing band and low transparency of conventional electromagnetic protection materials are the impediment for extensive applications. Here, a transparent and electrically tunable wave-absorbing metamaterial for stealth technology and electromagnetic protection has been theoretically and experimentally realized. The trend of the absorption feature change in simulation is consistent with that of the experiment results. The main part of this material adopts a sandwich structure c
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35

Jing, Tammy. "Selective Reflection of Cholesteric Liquid Crystals." Science Insights 40, no. 5 (2022): 515–17. http://dx.doi.org/10.15354/si.22.re051.

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Cholesteric liquid crystal materials with selective reflection characteristics are used in a variety of applications due to their unique optical properties, including liquid crystal photovoltaic panels, light enhancement films, liquid crystal dimming glass, liquid crystal dimming films, laser protection, and infrared stealth. At the moment, researchers have offered a variety of effective strategies for extending the range of reflection. The reflection wavelength of the cholesteric phase has been effectively widened through the investigation of each material system, laying the groundwork for th
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Chéron, Élie, Simon Félix, Jean-Philippe Groby, Vincent Pagneux, and Vicente Romero-García. "Wave transport in stealth hyperuniform materials: The diffusive regime and beyond." Applied Physics Letters 121, no. 6 (2022): 061702. http://dx.doi.org/10.1063/5.0097894.

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By varying the degree of correlation in stealthy hyperuniform (SHU) materials, the continuous evolution from uncorrelated disorder to periodic media is possible and allows us, as such, to study the fate of the bimodal distribution, the characteristic of a diffusive transport. Considering the wave transport through a SHU distribution of a given number of scatterers and at a given frequency, the transition from a diffusive to a transparent medium is clearly observed only below the Bragg frequency. This transition is characterized by a threshold value of the stealthiness at the vicinity of which
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Anuradha, Sathyamurthy, and Jyothi Balakrishnan. "RESONANCE BASED DISCRIMINATION OF STEALTH TARGETS COATED WITH RADAR ABSORBING MATERIAL (RAM)." Progress In Electromagnetics Research M 99 (2021): 69–79. http://dx.doi.org/10.2528/pierm20101001.

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38

Gaudiuso, Caterina, Annalisa Volpe, and Antonio Ancona. "One-Step Femtosecond Laser Stealth Dicing of Quartz." Micromachines 11, no. 3 (2020): 327. http://dx.doi.org/10.3390/mi11030327.

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We report on a one-step method for cutting 250-µm-thick quartz plates using highly focused ultrashort laser pulses with a duration of 200 fs and a wavelength of 1030 nm. We show that the repetition rate, the scan speed, the pulse overlap and the pulse energy directly influence the cutting process and quality. Therefore, a suitable choice of these parameters was necessary to get single-pass stealth dicing with neat and flat cut edges. The mechanism behind the stealth dicing process was ascribed to tensile stresses generated by the relaxation of the compressive stresses originated in the laser b
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Elza Ully Tiara Tampubolon, Bagus Kusuma, and Sovian Aritonang. "Studi Komparasi Bahan Barium Ferrite Magnet Dan Pani/Fe₃O₄, Sebagai Radar Absorbing Material (RAM)." Mars : Jurnal Teknik Mesin, Industri, Elektro Dan Ilmu Komputer 3, no. 1 (2025): 250–59. https://doi.org/10.61132/mars.v3i1.717.

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This research examines the effectiveness of Barium Ferrite and PANI/Fe₃O₄ composite as Radar Absorbing Material (RAM) to reduce radar detection. Barium Ferrite has high absorption at high frequencies as well as good thermal stability, making it suitable for applications under extreme and long-term conditions. In contrast, PANI/Fe₃O₄ composites exhibit high flexibility, the ability to absorb waves over a wider frequency range, as well as light weight, ideal for requirements with lightweight materials, such as aircraft. The analysis shows that the selection of RAM depends on the application requ
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Xiang, Huimin, Yongqiang Shi, Qingzhen Yang, Xufei Wang, and Yubo He. "Optimization Design of Honeycomb Absorbing Structure and Its Application in Aircraft Inlet Stealth." Aerospace 11, no. 10 (2024): 796. http://dx.doi.org/10.3390/aerospace11100796.

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The growing demand for stealth technology in military and aerospace applications has driven the development of advanced radar-absorbing structures. In particular, honeycomb absorbing structures (HASs) have shown promise due to their unique properties. In order to enhance the absorption characteristics of HASs and evaluate its application effect on aircraft, firstly, the mechanism of enhancing the electromagnetic (EM) absorption capacity of honeycomb structures by using a gradient design for the impregnation material is studied. Secondly, a multi-layer gradient honeycomb absorbing structure (MG
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41

An, Yi, Han Zou, and Aiguo Zhao. "Broadband Waterborne Multiphase Pentamode Metastructure with Simultaneous Wavefront Manipulation and Energy Absorption Capabilities." Materials 16, no. 14 (2023): 5051. http://dx.doi.org/10.3390/ma16145051.

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Acoustic metastructures are artificial structures which can manipulate the wavefront in sub-wavelength dimensions, and previously proposed acoustic metastructures have been mostly realized with single materials. An acoustic metastructure with composite structure is proposed for underwater acoustic stealth considering both wavefront manipulation and sound absorption. The unit cells of the metastructure are composed of a metallic supporting lattice, interconnecting polymer materials and mass balancing columns. With the gradual modulations of equivalent physical properties along the horizontal di
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Chen, Zhuo, Shengli Zhu, Chenghui Feng, and Changtao Liu. "Multi-objective optimization design and analysis of large deformation composite material." Journal of Physics: Conference Series 2383, no. 1 (2022): 012110. http://dx.doi.org/10.1088/1742-6596/2383/1/012110.

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In the future, advanced aircraft proposes to reduce the gaps on the surface of the body to improve the flight performance and stealth performance of the aircraft. This requires a sealing device between the movable surface of the leading and trailing edges of the wing and the fixed wing surface. Based on the sealing of the wing gap, this paper uses CATIA software combined with HyperWorks and ABAQUS software to design and optimize a large-deformation composite structure that can follow the large-scale movement of the movable surface without affecting the movement of the movable surface of the wi
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43

Deng, Jing Lan, and Bing Feng. "Carbonyl Iron/Graphite Double-Layer Structural Absorbing Composite." Advanced Materials Research 557-559 (July 2012): 390–93. http://dx.doi.org/10.4028/www.scientific.net/amr.557-559.390.

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A study of a new structured composite absorbing material, prepared using carbonyl iron and graphite as absorbers within a resin matrix. The study investigated the effects of varying the concentration of absorbing agent within the layers of the absorbing composite. Results show that the best absorbency was achieved when the impedance-matching layer contained 20% carbonyl iron content and the absorbing layer contained 35% graphite. The peak absorption was -20.19 dB, with a bandwidth of 7.3GHz (R< -10 dB) in the frequency range of 8 to 18 GHz. This work will certainly have significance guiding
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44

El Mohtadi, Farah, Richard d’Arcy, Xiaoye Yang, Zulfiye Yesim Turhan, Aws Alshamsan, and Nicola Tirelli. "Main Chain Polysulfoxides as Active ‘Stealth’ Polymers with Additional Antioxidant and Anti-Inflammatory Behaviour." International Journal of Molecular Sciences 20, no. 18 (2019): 4583. http://dx.doi.org/10.3390/ijms20184583.

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We present the evaluation of a sulfoxide-based polymer (poly(propylene sulfoxide), PPSO) as a potential ‘stealth’ macromolecule, and at the same time as a pharmacologically active (anti-inflammatory/anti-oxidant) material. The combination of these two concepts may at first seem peculiar since the gold standard polymer in biomaterials and drug delivery, poly(ethylene glycol) (PEG), is ‘stealth’ due to its chemical and biological inertness, which makes it hardly biologically active. Polysulfoxides, on the contrary, may couple a substantial inertness towards biomolecules under homeostatic conditi
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Wang, Hai Long, Shan Kui Liu, Yao Yao Qin, and Yun Gang Chen. "Hydroxycamptothecin Stealth Liposomes: Containing TPGS as a Novel PEGylated Long-Circulating Coating Material." Advanced Materials Research 886 (January 2014): 333–36. http://dx.doi.org/10.4028/www.scientific.net/amr.886.333.

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The goal of this study was to develop long-circulating liposomes of hydroxylcamptothecin (HCPT) with TPGS as a new coating material. Liposomes were prepared by a thin-film dispersion method with the lipids comprised phosphatidylcholine, cholesterol and TPGS. By contrast, other common PEGylated derivatives were also involved. HCPT-loaded liposomes with TPGS as coating material showed similar physicochemical characteristics andin vitrorelease profile to liposomes with DSPE-PEG or DPPE-PEG. It is suggested that TPGS can be applied as a novel coating material for long-circulating liposomes.
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46

He, Song, Jun Hu, Jinsong Chen, and Qiushi Xi. "Study on the relationship between reflectivity and thickness of radar-absorbing material." Journal of Physics: Conference Series 2808, no. 1 (2024): 012084. http://dx.doi.org/10.1088/1742-6596/2808/1/012084.

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Abstract Radar-absorbing materials (RAM) have been widely used in civilian areas for electromagnetic interference shielding and in the defense sector for radar wave stealth. The thickness of radar-absorbing materials is one of the important parameters affecting their performance. This paper analyzes the relationship between the absorbing performance of radar-absorbing materials and thickness based on transmission line theory. Through theoretical derivation and simulation verification, the concepts of optimal usage thickness and cutoff thickness of materials are derived. The research results ha
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Sui, Xue Ye, Jie Xu, Mei Ling Wei, Chong Hai Wang, Chang Ling Zhou, and Rui Xiang Liu. "Laser Stealth Properties for SiO2 Hollow Spheres with a Layer of Copper." Advanced Materials Research 624 (December 2012): 38–41. http://dx.doi.org/10.4028/www.scientific.net/amr.624.38.

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A kind of SiO2 hollow spheres with a layer of copper cladding have been prepared using the electroless copper plating metal processing technology on the surface of core material. We Study the effects of the process parameters on the properties of materials, and measure spectral reflectance for the SiO2 hollow spheres with the surface modification. The results show that the reflectance is about 4% for the wavelength of 1.06μm and is about 0.44% for 10.6μm wavelength. This compound hollow sphere structures can be act as laser camouflage materials.
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Bharti Kumari, Abhinav Kumar, Prashant Kumar, and Mintu Singh. "Polarization Independent Ultra-wideband Meta-material Absorber Using Conductive Ink Resonator." Journal of Telecommunications and Information Technology, no. 1 (February 12, 2024): 39–45. http://dx.doi.org/10.26636/jtit.2024.1.1392.

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A wideband meta-material absorber with square and circular split rings that is based on a frequency selective surface of conductive ink is proposed. With over 90% absorptivity, the structure demonstrates broad absorption for the C, X, KU and K bands, as well as polarization independent characteristics for both TE and TM, at angles of up to 45°. Research has been performed to better understand the absorption phenomenon by looking into real and imaginary permittivity, permeability, normalized impedance, and surface current density. The meta-material absorber (MA) discussed in this study finds us
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Yang, Shuang, Feng Ding, Zhiliang Gao, Jianman Guo, Jiwei Cui, and Peiyu Zhang. "Fabrication of Poly(ethylene glycol) Capsules via Emulsion Templating Method for Targeted Drug Delivery." Polymers 12, no. 5 (2020): 1124. http://dx.doi.org/10.3390/polym12051124.

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To reduce nonspecific interactions and circumvent biological barriers, low-fouling material of poly(ethylene glycol) (PEG) is most used for the modification of drug nanocarriers. Herein, we report the fabrication of PEG capsules via the free-radical polymerization of linear PEG or 8-arm-PEG using an emulsion templating method for targeted drug delivery. Doxorubicin (DOX) could be loaded in capsules via electrostatic interactions. The obtained capsules composed of 8-arm-PEG result in a lower cell association (2.2%) compared to those composed of linear PEG (7.3%) and, therefore, demonstrate the
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Zhuang, Shuxian, Wangqiao Chen, Bing Li, Tong Zhang, and Yujie Song. "A leaf-mimic material based on polyurethane microcapsules and Cr2O3 for hyperspectral stealth." Materials & Design 243 (July 2024): 113051. http://dx.doi.org/10.1016/j.matdes.2024.113051.

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