Effects of the morphology of CIPs on microwave absorption behaviors

Woo, Soobin; Yoo, Chun Sang; Lee, Mijung; Quevedo‐Lopez, Manuel; Choi, Hyunjoo

doi:10.1007/s13391-017-7002-z

Cited by 8 publications

(2 citation statements)

References 13 publications

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“…The tangent value of permittivity loss indicated that NiFe/FCIP has the strongest dielectric loss, owing to the high specific surface area of FCIP, more LDH grows, and more free charges accumulate at the interface under the applied exchange electromagnetic field, which makes the interface polarization stronger. Moreover, FCIP has a large width–thickness ratio compared to SCIP and has more defects and a larger specific surface area that can produce many surface atoms with unsaturated bonds, which can trigger massive dipoles, thus providing higher dipole polarization in the microwave frequency range …”

Section: Resultsmentioning

confidence: 99%

Nickel Iron Layered Double Hydroxide Nanostructures Composited with Carbonyl Iron Powder for Microwave Absorption

Dai

Zhou

Dong

et al. 2023

ACS Appl. Nano Mater.

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The specific nanostructure of the absorber is a key factor in improving the electromagnetic absorption performance. Herein, NiFe layered double hydroxide composited with carbonyl iron powder (LDH/CIP) was fabricated by a one-step hydrothermal synthesis process for the first time. By varying the morphology of the CIP template (spherical or flaky), the nanostructure of in situ grown LDH could be modulated, to optimize the electromagnetic wave absorption performance of LDH. The resultant NiFe/CIP synergistic composite has proved its excellent electromagnetic (EM) wave absorption performance with the minimum reflection loss (RL min ) of −96.5 dB and an effective absorption bandwidth (EAB) up to 7.6 GHz at the thickness of 8 mm. At a smaller thickness of 3 mm, the EAB value remains 7.2 GHz with the RL min of −16.4 dB. Such an outstanding absorption capacity is primarily attributed to the magnetic loss of NiFe LDH, which is more significantly enhanced using CIP as the substrate. Moreover, the formation of nano-flower-like LDHs, which possess rich heterogeneous structural interfaces and specific surface area to induce the polarization relaxation of the absorber. Therefore, the established NiFe/CIP composite brings insights into the design of high-performance EM wave absorbers.

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Section: Resultsmentioning

confidence: 99%

Nickel Iron Layered Double Hydroxide Nanostructures Composited with Carbonyl Iron Powder for Microwave Absorption

Dai

Zhou

Dong

et al. 2023

ACS Appl. Nano Mater.

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“…Furthermore, it was proved that the MW absorption heavily depends on catalyst morphology [36,37,38,39]. Researchers also indicated ake particles offer a better MW absorption than spherical morphology [40,41]. Another study, found that nanoparticle morphology can be controlled by ionic surfactants [42] and nano ake morphology was obtained by using tetramethyl ammonium bromide [43].…”

Section: Introductionmentioning

confidence: 99%

Steam combined dry reforming of methane over CoMo/Al2O3 nanoflake catalyst at low microwave power irradiation

Alawi,

Nguyen,

Al-Mohammedawi

et al. 2024

Braz. J. Chem. Eng.

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This research involved performing steam-assisted dry reformation (SDR) on methane over a CoMo 2 /Al 2 O 3 nano ake catalyst irradiated at microwave frequencies. CoMo 2 nano akes showed great catalytic activity for reforming reactions due to their excellent exposed surface to the incident MW and better ability to absorb MW. Fischer-Tropsch (F-T) synthesis is used to manufacture liquid fuels, and the predicted syngas ratio (H 2 /CO) can be easily modi ed by adjusting the quantity of steam to carbon ratio (S/C) supplied into the reactor. With an intake S/C ratio of less than (0.1) and (200 W) of MW power, it is possible to get an H 2 /CO ratio greater than one. Compared to carbon-based catalysts, the catalytic stability of the CoMo 2 nano akes catalysts was much higher after 16 hours of time-on-stream (TOS) of the SDR process while being exposed to MW irradiation. Steam combination dry reforming, MW assistance, and a CoMo catalyst are some keywords that might be used here.

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Wave-transmitting material to optimize impedance matching and enhance microwave absorption properties of flaky carbonyl iron coating

Zeng

Yang

et al. 2020

J Mater Sci: Mater Electron

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Effects of the morphology of CIPs on microwave absorption behaviors

Cited by 8 publications

References 13 publications

Nickel Iron Layered Double Hydroxide Nanostructures Composited with Carbonyl Iron Powder for Microwave Absorption

Nickel Iron Layered Double Hydroxide Nanostructures Composited with Carbonyl Iron Powder for Microwave Absorption

Steam combined dry reforming of methane over CoMo/Al2O3 nanoflake catalyst at low microwave power irradiation

Wave-transmitting material to optimize impedance matching and enhance microwave absorption properties of flaky carbonyl iron coating

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