The effect of yttrium on the microwave absorbing properties of Fe78Si13B9 alloy powders

Jia, Zhi; Zhu, Zhenghou; Zeng, Chaochao; Zhao, Hui; Yuan, Zhifen

doi:10.1016/j.cej.2020.124444

Cited by 9 publications

(2 citation statements)

References 13 publications

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“…Rare earth is known as "industrial gold", which can improve the performance of other products. Especially medium and heavy rare earth materials have extremely high strategic and economic value [22]. On the contrary, light rare earth materials are often discarded in large quantities as accessories.…”

Section: Introductionmentioning

confidence: 99%

Multiple Tuned CNTs by Rare Earth Oxides for High Efficiency Electromagnetic Wave Absorption

Gao,

Qin,

Tao

et al. 2024

Preprint

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Optimizing high dielectric constant materials is a promising strategy for manufacturing efficient electromagnetic wave absorbing materials, which aims to fully exploit the performance advantages of micro-nano materials and overcome the adverse effects at low scales. This requires reasonable and meticulous component optimization. The low-cost and environmentally friendly fillers possess significant advantages. In this work, two specifications of carbon nanotubes (CNTs) are selected as the research objects. A simple solvothermal method is used to compound rare earth oxides (REO). Finally, CNTs/REO composites are prepared. The effects of different particle sizes on the electromagnetic wave absorption properties of the system are studied in detail from the microscopic morphology. Improve the interface effect and impedance matching in the system. When the filling amount is 30 wt.%, the minimum reflection loss (RLmin) can reach -69.94 dB, and the effective absorption bandwidth (EAB) is widened from 3.00 GHz to 5.20 GHz. The huge performance span is attributed to the optimization of REO nanoparticles in the regulation of CNTs from morphology structure to electromagnetic parameters. The interfacial polarization, dielectric polarization and dipole relaxation are improved significantly. The excellent electromagnetic wave absorption performance makes CNTs/REO have great application prospects in electronic devices. In addition, radar reflective interface (RCS) simulation provides theoretical support for the practical application of CNTs/REO composites.

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Section: Introductionmentioning

confidence: 99%

Multiple Tuned CNTs by Rare Earth Oxides for High Efficiency Electromagnetic Wave Absorption

Gao,

Qin,

Tao

et al. 2024

Preprint

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show abstract

“…With the development of wireless communication and radar technologies, microwave absorbing materials (MAMs) with strong absorption over different microwave bands and superior stability in harsh environments are more and more important to suppress microwave interference or to reduce the radar cross-section of objects [1]. Emerging MAMs are expected to be flexible in designing working bands [2,3] and have stable performance at elevated temperatures [4,5] or in corrosive environments [6,7]. These requirements are beyond the reach of traditional microwave absorbents with single composition, e.g., carbonyl iron [8,9].…”

Section: Introductionmentioning

confidence: 99%

Deformation-Thermal Co-Induced Ferromagnetism of Austenite Nanocrystalline FeCoCr Powders for Strong Microwave Absorption

Chen

Wang

et al. 2022

Nanomaterials

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Nanocrystalline soft magnetic alloy powders are promising microwave absorbents since they can work at diverse frequencies and are stable in harsh environments. However, when the alloy powders are in austenite phase, they are out of the screen for microwave absorbents due to their paramagnetic nature. In this work, we reported a strategy to enable strong microwave absorption in nanocrystalline austenite FeCoCr powders by deformation-thermal co-induced ferromagnetism via attritor ball milling and subsequent heat treatment. Results showed that significant austenite-to-martensite transformation in the FeCoCr powders was achieved during ball milling, along with the increase in shape anisotropy from spherical to flaky. The saturation magnetization followed parabolic kinetics during ball milling and rose from 1.43 to 109.92 emu/g after milling for 4 h, while it exhibited a rapid increase to 181.58 emu/g after subsequent heat treatment at 500 °C. A considerable increase in complex permeability and hence magnetic loss capability was obtained. With appropriate modulation of complex permittivity, the resultant absorbents showed a reflection loss of below −6 dB over 8~18 GHz at thickness of 1 mm and superior stability at 300 °C. Our strategy can broaden the material selection for microwave absorbents by involving Fe-based austenite alloys and simply recover the ferromagnetism of industrial products made without proper control of the crystalline phase.

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Effect of Fe Content on the Microwave Performance of HoNi2 Alloys

Xia

Cheng

et al. 2021

Journal of Elec Materi

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The effect of yttrium on the microwave absorbing properties of Fe78Si13B9 alloy powders

Cited by 9 publications

References 13 publications

Multiple Tuned CNTs by Rare Earth Oxides for High Efficiency Electromagnetic Wave Absorption

Multiple Tuned CNTs by Rare Earth Oxides for High Efficiency Electromagnetic Wave Absorption

Deformation-Thermal Co-Induced Ferromagnetism of Austenite Nanocrystalline FeCoCr Powders for Strong Microwave Absorption

Effect of Fe Content on the Microwave Performance of HoNi2 Alloys

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