Double-layer structure combined with FSS design for the improvement of microwave absorption of BaTiO3 particles and graphene nanoplatelets filled epoxy coating

Qing, Yuchang; Nan, Hanyi; Ma, Liya; Luo, Fa; Zhou, Weihua

doi:10.1016/j.jallcom.2017.12.215

Cited by 39 publications

(5 citation statements)

References 42 publications

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“…In practical applications, the features of broad EAB, stability, and lightweight are the key considerations. Figure gives the comparison of the thickness and the EAB of the BaTiO 3 -based absorbers in recently reported papers. ,,− As can be seen, the BaTiO 3 @C/paraffin composite in this work exhibited a broad EAB of 6 GHz at a thickness of only 1.8 mm, which is the highest among all of the BaTiO 3 -based absorbing materials listed. Generally, the absorption properties of the EM wave of a material depend on both the impedance matching and attenuation characteristics that are closely related to its microstructure and the EM properties. − Figure illustrates the microwave dissipation process of the BaTiO 3 @C/paraffin composites in the present work.…”

Section: Results and Discussionmentioning

confidence: 54%

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BaTiO₃@C Core–Shell Nanoparticle/Paraffin Composites for Wide-Band Microwave Absorption

Zhang

et al. 2021

ACS Appl. Nano Mater.

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BaTiO 3 @C nanoparticles with a core−shell nanostructure were synthesized through a facile hydrothermal and dopamine carbonization process. The microstructure of nanoparticles and microwave absorption performance of the nanoparticle/ paraffin composite were systematically investigated. Dense heterogeneous interfaces and conductive carbon shells are formed on the surfaces of the BaTiO 3 nanoparticles. The enhanced interfacial polarization, dipole polarization, and conductive loss contribute to the improved microwave absorption properties with a minimum reflection loss of −27.1 dB (>99.9% microwave absorption) and a broad bandwidth of 6.0 GHz at a thickness of only 1.8 mm. This work suggests a feasible approach for the efficient production of core−shell-structured nanoparticles with excellent absorption properties.

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Section: Results and Discussionmentioning

confidence: 54%

“…Effective absorption bandwidth (EAB) versus the thicknesses for typical BaTiO 3 -based microwave absorbing materials reported in recent papers. ,,− …”

Section: Results and Discussionmentioning

confidence: 99%

BaTiO₃@C Core–Shell Nanoparticle/Paraffin Composites for Wide-Band Microwave Absorption

Zhang

et al. 2021

ACS Appl. Nano Mater.

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“…Diverse absorbing matrices have been employed to prepare microwave‐absorbing samples including polystyrene, concrete, silicone rubber, polyurethane foam, self‐healing hydrogel, cement, polyvinyl chloride, paraffin, polymethylmethacrylate, polyacrylonitrile, polyester, epoxy, polyurethane, and polyvinylidene fluoride. [ 7,13–50 ] Among them, the media having the capability to be applied as building materials shed new light on the practical applications of this type of materials. Apparently, gypsum plaster was conventionally applied as a coating agent to cover the interior and exterior of building walls, due to its acceptable adhesion, appearance, texture, and also proper mechanical characteristics as a building material.…”

Section: Introductionmentioning

confidence: 99%

Fabrication of ZnS/g‐C₃N₄/Gypsum Plaster Nanocomposite Toward Refining Electromagnetic Pollution and Saving Energy

Peymanfar,

Mousivand,

Mirkhan

2023

Energy Tech

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Global concerns have been excited by burgeoning electromagnetic pollution and climate change. Paying attention to building materials is one of the best ways to refine electromagnetic pollution and save energy. Herein, a practical nanocomposite has been introduced that not only absorbs microwaves, but also plays a significant role in energy‐saving. Interestingly, the approach related to the selection of a simple experimental procedure, cost‐effective substrates, and building matrix develops the practical applications of the eventual product. Initially, graphite‐like carbon nitride (g‐C3N4) nanosheets are tailored using a conventional sintering route, and then the prepared nanosheets are ornamented by zinc sulfide (ZnS) nanoparticles through a facile hydrothermal scenario. Remarkably, the microwave and optical features of the tailored ZnS/g‐C3N4 nanocomposite are modulated by regulating the mass fraction of ZnS into 2D structures. Interestingly, a novel defecting agent is used to boost the dielectric characteristics of g‐C3N4 through an innovative complementary hydrothermal and combustion scenario. Eventually, the architected structures are blended with gypsum plaster to evaluate energy‐saving and microwave‐absorbing performance. The nanocomposites fabricated by ZnS/defected g‐C3N4/gypsum plaster as building materials have significant microwave‐absorbing and infrared reflection capacity. The presented research opens a new vista for simultaneous development of advanced functional materials for energy‐saving and microwave absorption.

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“…[22] The structural design of the material can change the propagation path of the microwave by adjusting the electromagnetic coupling effect, and consume its energy through resonance or the loss mechanism of the material itself, to achieve broadband absorption. [23,24] Yang et al designed a periodic aluminum circular array on the upper layer and a microwave absorbing material on the C/Al 2 O 3 ceramic material on the lower layer, the absorption bandwidth below −5 dB finally reached 9 GHz. [25] In the process of structural design, the researchers get inspiration from natural creatures, which render unique optical properties by these biological microstructures that are engineered through absorption, reflection, scattering, transmission, and emission.…”

Section: Introductionmentioning

confidence: 99%

“…The structural design of the material can change the propagation path of the microwave by adjusting the electromagnetic coupling effect, and consume its energy through resonance or the loss mechanism of the material itself, to achieve broadband absorption. [ 23,24 ] Yang et al. designed a periodic aluminum circular array on the upper layer and a microwave absorbing material on the C/Al 2 O 3 ceramic material on the lower layer, the absorption bandwidth below −5 dB finally reached 9 GHz.…”

Section: Introductionmentioning

confidence: 99%

Moth‐Eye‐Inspired Gradient Impedance Microwave Absorption Materials with Multiband Compatible Stealth Characteristic

Duan

Huang

et al. 2023

Adv Materials Technologies

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There is an urgent need to develop microwave absorbing materials with ultra‐broadband absorption and multiband stealth compatibility, but this is difficult to achieve due to the difficulty of perfect electromagnetic impedance matching. Therefore, inspired by the anti‐reflection moth eye model, this article prepares carbonyl iron (CIP)/polyurethane (PU) absorbing materials into three biomimetic structures of cylinder, circular cone, and semi‐ellipsoid structures to optimize the absorption performance, which realizes the effective absorption of 5.13–18 GHz. The simulation models proved that the biomimetic structures can improve the anti‐reflection performance by building gradient impedance inside the materials. Finally, under the synergistic action of multiple reflection and gradient impedance mechanisms, the effective absorption bandwidth (EAB) of the semi‐ellipsoid moth eye biomimetic structure material with a total thickness of 3 mm can reach 6.94 GHz. The material can still achieve the EAB of 6.84 GHz with a low infrared emissivity of 0.242 by constructing the double‐layer structure. This work effectively solves the problem that the EAB of traditional microwave absorbing materials is difficult to be broadened due to impedance mismatch, and puts forward a new idea for optimizing the performance of microwave absorbing materials and compatible stealth.

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Double-layer structure combined with FSS design for the improvement of microwave absorption of BaTiO3 particles and graphene nanoplatelets filled epoxy coating

Cited by 39 publications

References 42 publications

BaTiO₃@C Core–Shell Nanoparticle/Paraffin Composites for Wide-Band Microwave Absorption

BaTiO₃@C Core–Shell Nanoparticle/Paraffin Composites for Wide-Band Microwave Absorption

Fabrication of ZnS/g‐C₃N₄/Gypsum Plaster Nanocomposite Toward Refining Electromagnetic Pollution and Saving Energy

Moth‐Eye‐Inspired Gradient Impedance Microwave Absorption Materials with Multiband Compatible Stealth Characteristic

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Double-layer structure combined with FSS design for the improvement of microwave absorption of BaTiO3 particles and graphene nanoplatelets filled epoxy coating

Cited by 39 publications

References 42 publications

BaTiO3@C Core–Shell Nanoparticle/Paraffin Composites for Wide-Band Microwave Absorption

BaTiO3@C Core–Shell Nanoparticle/Paraffin Composites for Wide-Band Microwave Absorption

Fabrication of ZnS/g‐C3N4/Gypsum Plaster Nanocomposite Toward Refining Electromagnetic Pollution and Saving Energy

Moth‐Eye‐Inspired Gradient Impedance Microwave Absorption Materials with Multiband Compatible Stealth Characteristic

Contact Info

Product

Resources

About

BaTiO₃@C Core–Shell Nanoparticle/Paraffin Composites for Wide-Band Microwave Absorption

BaTiO₃@C Core–Shell Nanoparticle/Paraffin Composites for Wide-Band Microwave Absorption

Fabrication of ZnS/g‐C₃N₄/Gypsum Plaster Nanocomposite Toward Refining Electromagnetic Pollution and Saving Energy