Enhanced dielectric and electromagnetic interference shielding properties of FeSiAl/Al 2 O 3 ceramics by plasma spraying

Qing, Yuchang; Su, Jinbu; Wen, Qinlong; Luo, Fa; Zhu, Dongmei; Zhou, Wancheng

doi:10.1016/j.jallcom.2015.08.107

Cited by 66 publications

(13 citation statements)

References 32 publications

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“…The average value of shielding effectiveness was 24.2 dB (99.6%) in X‐band (8.2–12.4 GHz) for the MoSi 2 /glass composite coating with 30 wt% MoSi 2 with 1.5 mm thickness. Before this, the same investigation team led by Qing et al (2015) [ 121 ] fabricated about 3 mm‐thick FeSiAl/Al 2 O 3 composite coatings onto graphite substrate with different FeSiAl contents (10%, 20%, 30%, 40%) in the Al 2 O 3 matrix, to investigate the shielding effectiveness. Analysis showed that the total shielding effectiveness of 40 wt% FeSiAl powder‐filled Al 2 O 3 ceramics exceeded 36 dB in whole X‐band with a thickness of 2.0 mm, indicating high EM attenuation properties.…”

Section: Electromagnetic Wave Propagation Characteristics Of Thermal ...mentioning

confidence: 99%

Thermal Spray Coatings for Electromagnetic Wave Absorption and Interference Shielding: A Review and Future Challenges

et al. 2022

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This review aims to consolidate scattered literature on thermally sprayed coatings with nonionizing electromagnetic (EM) wave absorption and shielding over specific wavelengths potentially useful in diverse applications (e.g., microwave to millimeter wave, solar selective, photocatalytic, interference shielding, thermal barrier‐heat/emissivity). Materials EM properties such as electric permittivity, magnetic permeability, electrical conductivity, and dielectric loss are critical due to which a material can respond to absorbed, reflected, transmitted, or may excite surface electromagnetic waves at frequencies typical of electromagnetic radiations. Thermal spraying is a standard industrial practice used for depositing coatings where the sprayed layer is formed by successive impact of fully or partially molten droplets/particles of a material exposed to high or moderate temperatures and velocities. However, as an emerging novel application of an existing thermal spray techniques, some special considerations are warranted for targeted development involving relevant characterization. Key potential research areas of development relating to material selection and coating fabrication strategies and their impact on existing practices in the field are identified. The study shows a research gap in the feedstock materials design and doping, and their complex selection covered by thermally sprayed coatings that can be critical to advancing applications exploiting their electromagnetic properties.

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Section: Electromagnetic Wave Propagation Characteristics Of Thermal ...mentioning

confidence: 99%

Thermal Spray Coatings for Electromagnetic Wave Absorption and Interference Shielding: A Review and Future Challenges

et al. 2022

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“…The high electrical conductivity of FeSiAl material and its high permittivity, as well as their good temperature stability [12,13] allowed its use in the reinforcement of ceramic composites for the improvement of microwave absorption properties [14], and for the design of electromagnetic wave absorbing materials. Recently, the dispersion of FeSiAl particles in the alumina matrix has resulted in the FeSiAl/Al2O3 composite, which has higher dielectric properties and excellent microwave absorption properties [1].…”

Section: Introductionmentioning

confidence: 99%

Complex permittivity of FeSiAl/Al₂O₃ ceramic composite at X-band frequencies

2021

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The objective of this paper is to extract and study the complex permittivity of the FeSiAl/Al2O3 ceramic composite at X-band frequencies. We studied by simulation the complex permittivity of four composites with FeSiAl content varying from 0% to 15% by volume in the alumina matrix. The influence of the FeSiAl content on the complex permittivity of the FeSiAl / Al2O3 composite was also studied. The results obtained show on the one hand that the complex permittivity depends on the frequency. Indeed, the values of the real and imaginary parts of the complex permittivity decrease with the increase in frequency over the entire frequency range in the X band. On the other hand, the high FeSiAl content has a significant impact on the values of the real and imaginary parts of complex permittivity. Higher values were obtained for composites with a high inclusion content. In this work, we obtained a good agreement between the simulation results and the published experimental results. These results indicate that the FeSiAl / Al2O3 composite can be used in applications as an electromagnetic wave absorbing material.

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“…Typically, the graphite-like layered structure of B atoms and the electronic structure of the Zr outer layer leads to the formation of highly conductive ZrB 2 [ 15 ]. The high conductivity implies a large value of ε″ so that the material has a good dielectric loss capability, thus causing the EM energy to be dissipated in the form of Joule heat by inducing a high current [ 16 ]. However, the strong covalent bonds of ZrB 2 imply that hot pressing or spark plasma sintering at temperatures over 2000 °C are usually required to meet the densification of ZrB 2 -based ceramics [ 17 ].…”

Section: Introductionmentioning

confidence: 99%

Effects of Multi-Components on the Microwave Absorption and Dielectric Properties of Plasma-Sprayed Carbon Nanotube/Y2O3/ZrB2 Ceramics

Qing

2021

Nanomaterials

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Carbon nanotube (CNT)-reinforced Y2O3/ZrB2 ceramics were fabricated via planetary ball milling and atmospheric-pressure plasma spraying for the first time. The phase composition, micromorphology, and electromagnetic (EM) wave absorption performance of the Y2O3/ZrB2/CNT hybrid was investigated from 8.2 to 12.4 GHz. Both the real and imaginary parts of the complex permittivity were enhanced as the ZrB2 and CNT content increased. The Y2O3/ZrB2/CNT hybrids corresponded to a ZrB2 content of 15 wt.%, and the CNT content was 2 wt.% and showed an exceptional EM wave absorption capability, with a minimum reflection loss of −25.7 dB at 1.9 mm thickness, and the effective absorption band was in a full X-band. These results indicate that an appropriate CNT or ZrB2 content can tune the complex permittivity and absorption performance of the Y2O3/ZrB2/CNT ceramics.

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Enhanced dielectric and electromagnetic interference shielding properties of FeSiAl/Al 2 O 3 ceramics by plasma spraying

Cited by 66 publications

References 32 publications

Thermal Spray Coatings for Electromagnetic Wave Absorption and Interference Shielding: A Review and Future Challenges

Thermal Spray Coatings for Electromagnetic Wave Absorption and Interference Shielding: A Review and Future Challenges

Complex permittivity of FeSiAl/Al₂O₃ ceramic composite at X-band frequencies

Effects of Multi-Components on the Microwave Absorption and Dielectric Properties of Plasma-Sprayed Carbon Nanotube/Y2O3/ZrB2 Ceramics

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Enhanced dielectric and electromagnetic interference shielding properties of FeSiAl/Al 2 O 3 ceramics by plasma spraying

Cited by 66 publications

References 32 publications

Thermal Spray Coatings for Electromagnetic Wave Absorption and Interference Shielding: A Review and Future Challenges

Thermal Spray Coatings for Electromagnetic Wave Absorption and Interference Shielding: A Review and Future Challenges

Complex permittivity of FeSiAl/Al2O3 ceramic composite at X-band frequencies

Effects of Multi-Components on the Microwave Absorption and Dielectric Properties of Plasma-Sprayed Carbon Nanotube/Y2O3/ZrB2 Ceramics

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Complex permittivity of FeSiAl/Al₂O₃ ceramic composite at X-band frequencies