Enhanced heat-resistance property of aluminum-coated carbonyl iron particles as microwave absorption materials

Zhou, Yingying; Ma, Liya; Li, Rong; Chen, Dan; Lu, Yuanyuan; Cheng, Yayi; Luo, Xiaohu; Xie, Honglan; Zhou, Wancheng

doi:10.1016/j.jmmm.2020.167681

Cited by 16 publications

(7 citation statements)

References 40 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…For example, Yingying Zhou et al, prepared nano aluminum (Al)-coated carbonyl iron particles (CIPs) by the ball milling method to prepare Al@CIPs absorbers with oxidation resistance, high absorption, and heat resistance. The results demonstrated that the absorbing specimens were made by mixing 70 wt% content of the powder with paraffin wax, and the RL min value of −27.2 dB was obtained at 10.5 GHz when the thickness was 1.6 mm [81]. Metallic Ag has good electrical conductivity and stability, and Ag nanoparticles enhance interfacial polarization, dipole polarization, and conductivity loss, thus improving microwave absorption performance [82].…”

Section: Metal-coated Fementioning

confidence: 94%

“…mixing 70 wt% content of the powder with paraffin wax, and the RLmin value of −27.2 dB was obtained at 10.5 GHz when the thickness was 1.6 mm [81]. Metallic Ag has good electrical conductivity and stability, and Ag nanoparticles enhance interfacial polarization, dipole polarization, and conductivity loss, thus improving microwave absorption performance [82].…”

Section: Metal-coated Fementioning

confidence: 97%

See 1 more Smart Citation

Recent Progress in Iron-Based Microwave Absorbing Composites: A Review and Prospective

et al. 2022

View full text Add to dashboard Cite

With the rapid development of communication technology in civil and military fields, the problem of electromagnetic radiation pollution caused by the electromagnetic wave becomes particularly prominent and brings great harm. It is urgent to explore efficient electromagnetic wave absorption materials to solve the problem of electromagnetic radiation pollution. Therefore, various absorbing materials have developed rapidly. Among them, iron (Fe) magnetic absorbent particle material with superior magnetic properties, high Snoek’s cut-off frequency, saturation magnetization and Curie temperature, which shows excellent electromagnetic wave loss ability, are kinds of promising absorbing material. However, ferromagnetic particles have the disadvantages of poor impedance matching, easy oxidation, high density, and strong skin effect. In general, the two strategies of morphological structure design and multi-component material composite are utilized to improve the microwave absorption performance of Fe-based magnetic absorbent. Therefore, Fe-based microwave absorbing materials have been widely studied in microwave absorption. In this review, through the summary of the reports on Fe-based electromagnetic absorbing materials in recent years, the research progress of Fe-based absorbing materials is reviewed, and the preparation methods, absorbing properties and absorbing mechanisms of iron-based absorbing materials are discussed in detail from the aspects of different morphologies of Fe and Fe-based composite absorbers. Meanwhile, the future development direction of Fe-based absorbing materials is also prospected, providing a reference for the research and development of efficient electromagnetic wave absorbing materials with strong absorption performance, frequency bandwidth, light weight and thin thickness.

show abstract

Section: Metal-coated Fementioning

confidence: 94%

Section: Metal-coated Fementioning

confidence: 97%

Recent Progress in Iron-Based Microwave Absorbing Composites: A Review and Prospective

et al. 2022

View full text Add to dashboard Cite

show abstract

“…Among the microwave absorbing materials, carbonyl iron (CIP) has excellent absorbing performance stem from the high saturation magnetization and large magnetic permeability. [11][12][13] However, the high permittivity of CIP will affect the impedance matching, resulting in a limited absorption performance. [14,15] Shen et al prepared cementitious composites containing CIP powder and fly ash that can obtain an absorption bandwidth less than −7 dB in the 2-18 GHz.…”

Section: Introductionmentioning

confidence: 99%

Moth‐Eye‐Inspired Gradient Impedance Microwave Absorption Materials with Multiband Compatible Stealth Characteristic

Duan

Huang

et al. 2023

Adv Materials Technologies

View full text Add to dashboard Cite

There is an urgent need to develop microwave absorbing materials with ultra‐broadband absorption and multiband stealth compatibility, but this is difficult to achieve due to the difficulty of perfect electromagnetic impedance matching. Therefore, inspired by the anti‐reflection moth eye model, this article prepares carbonyl iron (CIP)/polyurethane (PU) absorbing materials into three biomimetic structures of cylinder, circular cone, and semi‐ellipsoid structures to optimize the absorption performance, which realizes the effective absorption of 5.13–18 GHz. The simulation models proved that the biomimetic structures can improve the anti‐reflection performance by building gradient impedance inside the materials. Finally, under the synergistic action of multiple reflection and gradient impedance mechanisms, the effective absorption bandwidth (EAB) of the semi‐ellipsoid moth eye biomimetic structure material with a total thickness of 3 mm can reach 6.94 GHz. The material can still achieve the EAB of 6.84 GHz with a low infrared emissivity of 0.242 by constructing the double‐layer structure. This work effectively solves the problem that the EAB of traditional microwave absorbing materials is difficult to be broadened due to impedance mismatch, and puts forward a new idea for optimizing the performance of microwave absorbing materials and compatible stealth.

show abstract

“…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]. Soft magnetic alloys are promising to meet these new requirements [10][11][12][13] since they can benefit from composition design.…”

Section: Introductionmentioning

confidence: 99%

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

Chen

Wang

et al. 2022

Nanomaterials

View full text Add to dashboard Cite

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.

show abstract

Enhanced heat-resistance property of aluminum-coated carbonyl iron particles as microwave absorption materials

Cited by 16 publications

References 40 publications

Recent Progress in Iron-Based Microwave Absorbing Composites: A Review and Prospective

Recent Progress in Iron-Based Microwave Absorbing Composites: A Review and Prospective

Moth‐Eye‐Inspired Gradient Impedance Microwave Absorption Materials with Multiband Compatible Stealth Characteristic

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

Contact Info

Product

Resources

About