Study on Fe–Si–Cr Soft magnetic composite coated with silicon dioxide

Hao, Han; Pan, Donghua; Li, Duxin

doi:10.1088/2053-1591/aaee4c

Cited by 6 publications

(2 citation statements)

References 19 publications

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“…Furthermore, no characteristic diffraction peaks of Si and Cr were observed in the spectra, indicating that Si and Cr atoms were incorporated into the α-Fe lattice to form an α-BCC-Fe (Si and Cr) solid solution [21]. Clearly, the addition of ferrite did not in uence the crystal structure of the FFSC alloy.…”

Section: Microstructure and Micromorphology Analysismentioning

confidence: 96%

The strong broadband microwave absorption properties of FeSiCr@Ni 0.5 Zn 0.5 Fe 2 O 4 composite materials realized by optimizing impedance matching

Hou,

Ma,

Yang

et al. 2024

Preprint

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Flaky FeSiCr@Ni0.5Zn0.5Fe2O4 composites were successfully synthesized using ball milling and the hydrothermal method. The microstructure, morphology, and phase composition of flaky FeSiCr@Ni0.5Zn0.5Fe2O4 composites were analyzed using XRD, EDS and SEM techniques, confirming the successful preparation of the composite materials. The electromagnetic wave absorption characteristics of the composite with varying contents of Ni0.5Zn0.5Fe2O4 were comprehensively investigated. The electromagnetic properties of flaky FeSiCr@Ni0.5Zn0.5Fe2O4 composite materials were analyzed by VSM. The results showed a reduction in the real part of the permittivity, but this led to the optimization of impedance matching. This improvement was attributed to the synergistic effect of magnetic loss and dielectric loss, thereby enhancing the overall electromagnetic performance of the composite. The sample prepared with a composition of 40% (wt %) Ni0.5Zn0.5Fe2O4 composite displayed the most pronounced absorption performance. At a frequency of 4.3 GHz, the minimum reflection loss achieved was − 41.3 dB. The maximum effective absorption bandwidth measured 5.6 GHz. Notably, through adjustment of the composite material thickness, the effective absorption bandwidth could be broadened to 10.5 GHz (2.5–13.0 GHz), encompassing the entire C and X bands.

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Section: Microstructure and Micromorphology Analysismentioning

confidence: 96%

The strong broadband microwave absorption properties of FeSiCr@Ni 0.5 Zn 0.5 Fe 2 O 4 composite materials realized by optimizing impedance matching

Hou,

Ma,

Yang

et al. 2024

Preprint

View full text Add to dashboard Cite

show abstract

“…The Cr-Fe-Si ternary system has been much less studied, although it is of definite industrial and technological importance. Examples include applications in commercial alloy steels, anode materials for rechargeable Li-ion batteries, electromagnetic wave absorbers for mobile phones, and soft magnetic materials and some special applications in high temperature thermoelectric materials [1][2][3][4]. For thermoelectric applications, the two semiconducting silicides CrSi 2 and β-FeSi 2 are known as environmentally friendly and low-cost materials [5][6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Phases and Interfaces in the Cr–Fe–Si Ternary System: X-ray Diffraction and Electron Microscopy Study

et al. 2023

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The ternary Cr-Fe-Si system was investigated with X-ray diffraction, energy dispersive X-ray spectrometry, scanning and transmission electron microscopy, and electron diffraction. Samples melted at 1723 K were examined right after cooling or after annealing at 1073 K for 3 days to determine phases, grain sizes, and interphase interfaces. During annealing, a polymorphic transformation of the tetragonal α-FeSi2 to the orthorhombic β-FeSi2 phase occurs, while CrSi2 retains its hexagonal structure at high-temperature treatment. Thin layers of ε-FeSi with a cubic structure were observed and identified within the CrSi2 grains. Crystallographic orientation relationships are determined at the interphase interfaces. The contributions of lattice mismatch and thermal expansion coefficient misfit to deformation are discussed.

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The Strong Broadband Microwave Absorption Properties of FeSiCr@Ni_0.5Zn_0.5Fe₂O₄ Composites Realized by Optimizing Impedance Matching

Hou,

Ma,

Yang

et al. 2024

Physica Status Solidi (a)

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Flaky FeSiCr@Ni0.5Zn0.5Fe2O4 composites are successfully synthesized via ball milling and hydrothermal method. The microstructure, morphology, and phase composition of flaky FeSiCr@Ni0.5Zn0.5Fe2O4 composites are analyzed using X‐Ray diffractometer, energy dispersive spectroscopy, scanning electron microscope, and transmission electron microscope techniques. The electromagnetic wave absorption characteristics of the composite with varying contents of Ni0.5Zn0.5Fe2O4 are comprehensively investigated. The results show that the introduction of Ni0.5Zn0.5Fe2O4 reduces the permittivity, improves the synergistic effect of magnetic loss and dielectric loss, optimizes the impedance matching, and enhances the overall electromagnetic performance of the composites. The sample prepared with a composition of 40 wt% Ni0.5Zn0.5Fe2O4 displays the most pronounced absorption performance. The RLmin (reflection loss) reached −41.3 dB at 4.3 GHz, and the maximum effective absorption bandwidth (EAB) reaches 5.6 GHz which is 7–8 times that of the original sample. Notably, through adjusting the thickness of composites, the EAB could be broadened to 10.5 GHz (2.5–13.0 GHz), encompassing the entire C and X bands. The flaky FeSiCr@Ni0.5Zn0.5Fe2O4 composites have the advantages of wide source of raw materials, strong microwave absorption ability, and wide absorption frequency range, and are expected to become a potential microwave absorption material in the future.

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Study on Fe–Si–Cr Soft magnetic composite coated with silicon dioxide

Cited by 6 publications

References 19 publications

The strong broadband microwave absorption properties of FeSiCr@Ni 0.5 Zn 0.5 Fe 2 O 4 composite materials realized by optimizing impedance matching

The strong broadband microwave absorption properties of FeSiCr@Ni 0.5 Zn 0.5 Fe 2 O 4 composite materials realized by optimizing impedance matching

Phases and Interfaces in the Cr–Fe–Si Ternary System: X-ray Diffraction and Electron Microscopy Study

The Strong Broadband Microwave Absorption Properties of FeSiCr@Ni_0.5Zn_0.5Fe₂O₄ Composites Realized by Optimizing Impedance Matching

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Study on Fe–Si–Cr Soft magnetic composite coated with silicon dioxide

Cited by 6 publications

References 19 publications

The strong broadband microwave absorption properties of FeSiCr@Ni 0.5 Zn 0.5 Fe 2 O 4 composite materials realized by optimizing impedance matching

The strong broadband microwave absorption properties of FeSiCr@Ni 0.5 Zn 0.5 Fe 2 O 4 composite materials realized by optimizing impedance matching

Phases and Interfaces in the Cr–Fe–Si Ternary System: X-ray Diffraction and Electron Microscopy Study

The Strong Broadband Microwave Absorption Properties of FeSiCr@Ni0.5Zn0.5Fe2O4 Composites Realized by Optimizing Impedance Matching

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The Strong Broadband Microwave Absorption Properties of FeSiCr@Ni_0.5Zn_0.5Fe₂O₄ Composites Realized by Optimizing Impedance Matching