Microwave absorption properties of planar-anisotropy Ce 2 Fe 17 N 3 −δ powders/Silicone composite in X-band

Gu, Xisheng; Tan, Guoguo; Chen, Shuwen; Man, Qikui; Chang, Chuntao; Wang, Xinmin; Li, Run-Wei; Che, Shenglei; Jiang, Liqiang

doi:10.1016/j.jmmm.2016.10.025

Cited by 33 publications

(8 citation statements)

References 25 publications

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“…and Fe 2? [1,20], the lattice parameter of a and b decreases when Cr replaced Fe, and the diffraction peak will shift to the high-angle region according to the Bragg equation. The variation of lattice parameter and crystal volume is shown in Table 1.…”

Section: Methodsmentioning

confidence: 99%

Effect of Pr2Fe17 alloy doping Cr on magnetic and microwave absorption properties

Yuan

Yao

Zhou

et al. 2021

J Mater Sci: Mater Electron

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The Pr 2 Fe 17-x Cr x (x = 0.0, 0.1, 0.2, 0.4) powders were successfully prepared by arc melting and high-energy ball milling. The crystal structure, morphology, magnetic properties, and microwave absorption performance of the Pr 2 Fe 17-x Cr x alloys was studied by X-ray diffraction (XRD), scanning electron microscopy (SEM), vibrating sample magnetometer (VSM), and vector network analyzer (VNA), respectively. The results show that the saturation magnetization increases with the increase of Cr doping amount. The average particle sizes of Pr 2 Fe 17-x Cr x particulates are 1.56, 1.47, 1.67, and 1.71 lm, which correspond to x = 0.0, 0.1, 0.2, and 0.4, respectively, and the average particle size decreases first and then increases. The minimum absorption peak frequency of Pr 2 Fe 17-x Cr x shifts towards a lower frequency region with the increase of Cr doping amount. The minimum reflection loss (RL) of the Pr 2 Fe 17-x Cr x composite absorbers decreases first and then increases with the increase of Cr doping amount. The Pr 2 Fe 16.9 Cr 0.1 composite absorber exhibits excellent microwave absorption properties, its minimum reflection loss value can reach up to -33.81 dB at 7.28 GHz, and its effective absorption bandwidth (RL \ -10 dB) is 2.24 GHz with the best matching thickness of 2.2 mm.

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Section: Methodsmentioning

confidence: 99%

Effect of Pr2Fe17 alloy doping Cr on magnetic and microwave absorption properties

Yuan

Yao

Zhou

et al. 2021

J Mater Sci: Mater Electron

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“…According to the transmission line theory, the value of the reflection loss (RL) can be used for characterizing the microwave absorption performance [10,12]. Under normal wave incidence of a monolayer absorber terminated by a perfect conductor, RL can be calculated as followings [10,11,12] …”

Section: Microwave Absorption Performancementioning

confidence: 99%

“…Under normal wave incidence of a monolayer absorber terminated by a perfect conductor, RL can be calculated as followings [10,11,12] …”

Section: Microwave Absorption Performancementioning

confidence: 99%

Absorption properties of iron nitrides particles fabricated by ball milling

Gong¹,

Li²,

Tong³

2018

AIP Conference Proceedings

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Abstract. Iron nitrides particles with about 50% γʹ-Fe4N phase have been fabricated by traditional gas nitriding method and ball milling technique. Diameter of the particles is in a large range, from 5μm to 50μm. The electromagnetic wave absorption properties of the iron nitrides particles were investigated in the frequency range from 12.4GHz to 18GHz. The frequency range of reflection loss exceeding -20dB was 12.4 -18GHz, and the thickness range of absorber for that was 1.41 -2.31mm. An optimal reflection loss of -27.12dB was reached at the frequency of 15.5GHz with the thickness was 1.72mm. As a result, these iron nitrides particles could be applied in practical electromagnetic wave absorbing.

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“…With the rapid development of wireless communications, such as 5G mobile wireless systems, [1,2] and the widespread use of high-frequency information technology in recent years, [3,4] severe electromagnetic pollution has been created, which has a negative impact on performance of high-frequency electric devices. [5,6] Furthermore, the public is becoming increasingly concerned about the effects of electromagnetic pollution on human health and living environment. [7] Consequently, materials having superior electromagnetic wave absorption in the microwave frequency range are in high demands.…”

Section: Introductionmentioning

confidence: 99%

“…H θ is much larger than H φ resulting in the increasing permeability and resonance frequency. [19] These advantages is conducive to satisfy the impedance matching of the absorbing materials. The substantial eddy current loss produced by low resistivity restricts the concentration rise of the planar-anisotropy Re 2 T 17 magnetic powders, degrading the materials' magnetic characteristics.…”

Section: Introductionmentioning

confidence: 99%

Synthesis, magnetic and electromagnetic wave absorption properties of planar anisotrop Y2Co₁₇@SiO₂ rare earth soft magnetic composites

Qiao

et al. 2023

Chinese Phys. B

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The intermetallic complexes of rare-earth and 3d transition metals with core-shell structures are commonly employed as microwave absorbing materials due to their high saturation magnetizations and natural resonance in GHz. Hence, we synthesized Y$_2$Co$_{17}$ alloy via the co-precipitation reduction-diffusion technique, then coated the Y$_2$Co$_{17}$ magnetic powders with SiO$_2$ to create Y$_2$Co$_{17}$@SiO$_2$ core-shell structures.The formation of Y$_2$Co$_{17}$@SiO$_2$/polyurethane (PU) at various volume fractions and their magnetic, electromagnetic properties were investigated using XRD, SEM, EDS, and VNA. The microwave absorption characteristics of Y$_2$Co$_{17}$@SiO$_2$/PU were also investigated at various volume fractions. We not only investigate the zero-reflection conditions of the samples with different volume fractions, but also show that every absorber has a strong reflection loss value (RL$ \le -65.00$ dB) and excellent microwave absorption properties with an average reflection loss (RL) of Y$_2$Co$ _{17}$@SiO$_2$/PU being below $-10$ dB at $8-18$ GHz under different thicknesses, showing the enhancement of microwave absorption performance arises from the balance between permeability and permittivity of absorber.

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Microwave absorption properties of planar-anisotropy Ce 2 Fe 17 N 3 −δ powders/Silicone composite in X-band

Cited by 33 publications

References 25 publications

Effect of Pr2Fe17 alloy doping Cr on magnetic and microwave absorption properties

Effect of Pr2Fe17 alloy doping Cr on magnetic and microwave absorption properties

Absorption properties of iron nitrides particles fabricated by ball milling

Synthesis, magnetic and electromagnetic wave absorption properties of planar anisotrop Y2Co₁₇@SiO₂ rare earth soft magnetic composites

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Microwave absorption properties of planar-anisotropy Ce 2 Fe 17 N 3 −δ powders/Silicone composite in X-band

Cited by 33 publications

References 25 publications

Effect of Pr2Fe17 alloy doping Cr on magnetic and microwave absorption properties

Effect of Pr2Fe17 alloy doping Cr on magnetic and microwave absorption properties

Absorption properties of iron nitrides particles fabricated by ball milling

Synthesis, magnetic and electromagnetic wave absorption properties of planar anisotrop Y2Co17@SiO2 rare earth soft magnetic composites

Contact Info

Product

Resources

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Synthesis, magnetic and electromagnetic wave absorption properties of planar anisotrop Y2Co₁₇@SiO₂ rare earth soft magnetic composites