Analysis of Electromagnetic Shielding Properties of a Material Developed Based on Silver-Coated Copper Core-Shell Spraying

Jeon, Yu-Jae; Yun, Jong-Hwan; Kang, Min-Soo

doi:10.3390/ma15155448

Cited by 9 publications

(4 citation statements)

References 47 publications

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“…In addition to traditional materials, natural materials have also been explored for creating protective composites with unique properties. For instance, rice husk, bamboo, coconut shells, wood, sugarcane bagasse, and tea leaves can be used to create active carbon-type composite fillers that protect against electromagnetic radiation [14][15][16]. Rice husk ash-based composites have an SE of 20 dB in the 2 to 18 GHz range [17], while bamboo charcoal-based composites mixed with NiO⋅5ZnO⋅5Fe 2 O 4 have an SE of 11 dB in the 2 to 18 GHz range and 35 dB in the 18 to 40 GHz range [18].…”

Section: Introductionmentioning

confidence: 99%

Investigation of electrical conductivity and electromagnetic wave absorption capabilities of water hyacinth biocarbon impregnated with Cu atom

Susilo,

Imanudin,

Rochman

et al. 2024

Eureka: PE

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This paper discusses the impregnation of Cu atoms at carbonization temperature of water hyacinth bio carbon composite. This composite is used as an absorber of electromagnetic waves. Because the inference of electromagnetic waves can cause damage to other electronic equipment. In addition, electromagnetic wave radiation can cause various human health problems. The purpose of the research is to obtain a material that is able to absorb electromagnetic waves and increase electrical conductivity, impregnation of Cu atoms at carbonization temperature of water hyacinth bio carbon composite. The composite material uses a composition ratio of water hyacinth powder and phenol-formaldehyde of 30:70. The carburization temperatures used were 600 °C, 800 °C, and 1000 °C with a heat increase rate of 7 °C/minute. This study used Scanning Electron Micrograph (SEM), X-Ray Diffraction (XRD), LCR Meter, and vector network analyzer. The results show that the impregnation of Cu atoms at carbonization temperature can increase the area of the nanostructure, thereby increasing the formation of micropores in the composite. The higher the carbonization temperature, the percentage of Cu and carbon compounds can increase, while the percentage of crystal structure decreases. Impregnation of Cu atoms further strengthens the composite's absorption of electromagnetic wave radiation. Impregnation of Cu atoms in water hyacinth bio carbon composites at carbonization temperature can increase the electrical conductivity of the composite. The results of this research have potential applications in the electronics industry, batteries, and electrical devices, and can be used to protect devices from electromagnetic interference, especially in telecommunications and the medical field

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Section: Introductionmentioning

confidence: 99%

Investigation of electrical conductivity and electromagnetic wave absorption capabilities of water hyacinth biocarbon impregnated with Cu atom

Susilo,

Imanudin,

Rochman

et al. 2024

Eureka: PE

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“…or magnetic materials (metal oxides, ferrites, alloys, etc.) have been successfully used for mitigation or elimination of EMI mostly via magnetic or dielectric loss [ 8 , 9 , 10 , 11 , 12 , 13 , 14 , 15 , 16 ]. Metals and metallic composites belong to the oldest materials used for EMI shielding, but their utilization is limited by their high density, rigidity, poor mechanical flexibility, susceptibility to corrosion, difficult processability and high production costs [ 17 , 18 ].…”

Section: Introductionmentioning

confidence: 99%

Curing, Properties and EMI Absorption Shielding of Rubber Composites Based on Ferrites and Carbon Fibres

et al. 2023

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In this work, magnetic soft ferrites, namely manganese–zinc ferrite, nickel–zinc ferrite and combinations of both fillers, were incorporated into acrylonitrile-butadiene rubber to fabricate composite materials. The total content of ferrites was kept constant—300 phr. The second series of composites was fabricated with a similar composition. Moreover, carbon fibres were incorporated into rubber compounds in constant amount—25 phr. The work was focused on investigation of the fillers on absorption shieling performance of the composites, which was investigated within the frequency range 1–6 GHz. Then, the physical–mechanical properties of the composites were evaluated. The achieved results demonstrated that the absorption shielding efficiency of both composite types increased with increasing proportion of nickel–zinc ferrite, which suggests that nickel–zinc ferrite demonstrated better absorption shielding potential. Higher electrical conductivity and higher permittivity of composites filled with carbon fibres and ferrites resulted in their lower absorption shielding performance. Simultaneously, they absorbed electromagnetic radiation at lower frequencies. On the other hand, carbon fibres reinforced the rubber matrix, and subsequent improvement in physical–mechanical properties was recorded.

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“…The arrival of 5G communication technology and the development of new electronic equipment that are light weight, thin, and flexible have led to the demand for electromagnetic interference shielding materials. − Due to the excellent conductivity, the metal coating on flexible polymer substrates not only has high electromagnetic shielding performance but also has the required characteristics of flexibility, thinness, and conformal shielding. − During applications, high adhesion also needs to be considered. Nowadays, the electroless deposition method is widely adopted to metalize polymer surfaces.…”

Section: Introductionmentioning

confidence: 99%

High-Adhesion Ag Film with Enhanced Electromagnetic Shielding Performance via Post-Treatment of a Polydopamine Adhesive Layer

Zhang

et al. 2023

ACS Appl. Mater. Interfaces

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Low adhesion limits the application of the conformal metal coating based on metal–organic complexing deposition (MOD) ink in electromagnetic interference shielding with an ultrathin thickness and excellent electromagnetic shielding performance. Here, the mussel-inspired polydopamine (PDA) coating with double-sided adhesive characteristic was used to modify the substrate surface, and a high-adhesion silver film was prepared by spin-coating MOD ink on the PDA-modified substrate. The surface chemical bond of the deposited PDA coating was found to change with the exposure time under air in this work, and three post-treatment methods were carried out on the PDA coatings, including exposure to air for 1 min, exposure to air for a day, and oven heat treatment. The influences of such three post-treatment methods of PDA coating on the structure of the substrate surface, the silver film adhesion property, the electrical property, and the electromagnetic shielding property were studied. The adhesion of the silver film was effectively enhanced up to 20.45 MPa by controlling the post-treatment method of the PDA coating. The PDA coating was found to increase the sheet resistance of the silver film and to absorb electromagnetic waves. By optimizing the deposition time and the post-treatment condition of the PDA coating, superior electromagnetic shielding effectiveness up to 51.18 dB was obtained with a thin silver film of 0.42 μm. The introduction of the PDA coating improves the applicability of the MOD silver ink in the field of conformal electromagnetic shielding.

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Analysis of Electromagnetic Shielding Properties of a Material Developed Based on Silver-Coated Copper Core-Shell Spraying

Cited by 9 publications

References 47 publications

Investigation of electrical conductivity and electromagnetic wave absorption capabilities of water hyacinth biocarbon impregnated with Cu atom

Investigation of electrical conductivity and electromagnetic wave absorption capabilities of water hyacinth biocarbon impregnated with Cu atom

Curing, Properties and EMI Absorption Shielding of Rubber Composites Based on Ferrites and Carbon Fibres

High-Adhesion Ag Film with Enhanced Electromagnetic Shielding Performance via Post-Treatment of a Polydopamine Adhesive Layer

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