Influence of Cr content on structure and magnetic properties of Fe–Si–Al–Cr powders

Zhou, Tingdong; Tang, Juan; Wang, Z.Y.

doi:10.1016/j.jmmm.2010.03.026

Cited by 34 publications

(7 citation statements)

References 8 publications

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“…The electromagnetic wave absorber filled by flakeshaped metallic magnetic particles with high saturation magnetization, such as Fe, FeNi, and FeSiAl particles, have attracted much attention during recent years besides the dielectric materials with light weight. [1][2][3][4] As the magnetic moments lie in the flake plane, the product of initial susceptibility and natural resonance frequency can exceed Snoek limit and hence the flake-shaped particles can possess high permeability in GHz range. 5 By using this kind of magnetic particles as fillers, a thinner absorber can be achieved.…”

mentioning

confidence: 99%

Reflection loss mechanism of single layer absorber for flake-shaped carbonyl-iron particle composite

Wang¹,

Han²,

Tan³

et al. 2012

Journal of Applied Physics

181

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The reflection loss (RL) properties including the frequency, intensity, and bandwidth of absorption peaks for the flake-shaped carbonyl-iron particle/paraffin composite were investigated in detail. By measuring the reflection coefficient of the composite without (S11-OPEN) and with (S11-SHORT) a backed metal plate, the origin of the RL peak was directly verified. The separated electromagnetic wave energy reflected at the air-absorber interface and the absorber-metal plate interface was achieved from S11-OPEN and S11-SHORT parameters, and they were used to explain the intensity variation of the RL peak. The bandwidth of the RL peak was also deduced from viewpoint of interface reflection waves. The calculated bandwidth from the derived formula agreed well with the experimental data.

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mentioning

confidence: 99%

Reflection loss mechanism of single layer absorber for flake-shaped carbonyl-iron particle composite

Wang¹,

Han²,

Tan³

et al. 2012

Journal of Applied Physics

181

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“…These can be determined as the ( 110) and ( 200) crystal planes of the α-Fe (PDF#06-0696). The crystal system of FeSiAl flakes is a body-centered cubic (BCC) lattice structure, and the phase structure consists solely of α-Fe phase, as the diffraction peaks of Si and Al atoms are not found in this spectrum, indicating that significant amounts of Si and Al have dissolved into the crystal lattice of α-Fe completely after milling for 6 h [35,36].…”

Section: Resultsmentioning

confidence: 99%

Microwave All-Dielectric Metamaterial Design of FeSiAl/MWCNT Composite for Low-Frequency Broadband-Absorbing Properties

Wang,

Guo,

Dai

et al. 2023

Metals

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FeSiAl flakes were fabricated by vibrating ball milling the FeSiAl ribbons. And the microwave absorption properties of FeSiAl flakes were improved by doping the multi-wall carbon nanotubes (MWCNTs) with different mass concentrations. The results show that the FeSiAl/MWCNT composites exhibit significantly improved microwave absorption performance with advantages of strong and broadband absorption in the L-band and S-band. In particular, the reflection loss (RL) of the FeSiAl/MWCNT2 composite reaches −7.4 dB at 1.0 GHz, whereupon, through the electromagnetic simulation software CST Microwave Studio, FeSiAl/MWCNT2 all-dielectric metamaterial absorbers (ADMMAs) were macroscopically designed, achieving an ultra-wideband absorption (RL ≤ −10 dB) of 14.4 GHz (3.6~18.0 GHz). It is recognized that the standing wavelength resonance and diffraction effect are responsible for absorbing electromagnetic waves, and the broadband absorption is improved via dielectric dispersion; their synergistic effect makes the ADMMAs exhibit good microwave absorption performance. This work provides a useful method for designing microwave absorption materials with broadband absorption.

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“…[ 3 , 4 , 5 , 6 , 7 ], dielectric loss type (ferroelectric ceramics, MnO 2 , etc. ), and magnetic loss type (ferrite [ 8 , 9 , 10 , 11 ], carbonyl iron [ 12 , 13 , 14 , 15 , 16 ], magnetic metal alloy powder [ 17 , 18 , 19 , 20 , 21 , 22 , 23 , 24 , 25 ], etc.). Magnetic alloy powders have been widely studied for their high absorption intensity and wide absorption band.…”

Section: Introductionmentioning

confidence: 99%

Preparation and Electromagnetic Absorption Properties of Fe73.2Si16.2B6.6Nb3Cu1 Nanocrystalline Powder

Zhou

et al. 2022

Materials

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In order to decrease and control electromagnetic pollution, absorbing materials with better electromagnetic wave absorption properties should be developed. In this paper, a nanocrystalline alloy ribbon with the composition of Fe73.2Si16.2B6.6Nb3Cu1 was designed and prepared. Nanocrystalline alloy powder was obtained by high-energy ball milling treatment. The effects of ball milling time on the soft magnetic properties, microstructure, morphology, and electromagnetic wave absorption properties of alloy powder were investigated. The results showed that, as time increased, α-(Fe, Si) gradually transformed into the amorphous phase, and the maximum saturation magnetization (Ms) reached 135.25 emu/g. The nanocrystalline alloy powder was flakelike, and the minimum average particle size of the powder reached 6.87 μm. The alloy powder obtained by ball milling for 12 h had the best electromagnetic absorption performance, and the minimum reflection loss RLmin at the frequency of 6.52 GHz reached −46.15 dB (matched thickness was 3.5 mm). As time increased, the best matched frequency moved to the high-frequency direction, and the best matched thickness decreased, while the maximum effective absorption bandwidth ΔfRL<−10 dB was 7.22 GHz (10.78–18 GHz).

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Influence of Cr content on structure and magnetic properties of Fe–Si–Al–Cr powders

Cited by 34 publications

References 8 publications

Reflection loss mechanism of single layer absorber for flake-shaped carbonyl-iron particle composite

Reflection loss mechanism of single layer absorber for flake-shaped carbonyl-iron particle composite

Microwave All-Dielectric Metamaterial Design of FeSiAl/MWCNT Composite for Low-Frequency Broadband-Absorbing Properties

Preparation and Electromagnetic Absorption Properties of Fe73.2Si16.2B6.6Nb3Cu1 Nanocrystalline Powder

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