Particle size and loading ratio dependent microwave absorption performance of FeSiAl alloy and the mechanism study

TY - JOUR

T1 - Particle size and loading ratio dependent microwave absorption performance of FeSiAl alloy and the mechanism study

AU - Lian, Shuoyu

AU - Li, Xiang

AU - Li, Hongbo

AU - Cheng, Xingwang

N1 - Publisher Copyright: © 2025

PY - 2025/4

Y1 - 2025/4

N2 - This paper investigates the microwave absorption performance of FeSiAl alloy powders with varying particle sizes and loadings. Potential mechanisms underlying the microwave absorption of the studied materials are discussed. The results reveal that FeSiAl material exhibits a relatively weak dielectric loss, while the dominant electromagnetic wave dissipation stems from its magnetic loss. Detailed study indicates that decreasing in average particle size and increasing in loading ratio of FeSiAl absorbent effectively modify the dissipative ability of the samples. As the average particle size increases, the natural resonance frequency of FeSiAl alloy powders shifts to lower frequencies. By optimization, it is found that FeSiAl alloy absorber sample with nominal 500 nm absorbent particle size and 80 wt% loading (500 nm-80wt%) achieved an effective absorption bandwidth (EAB) of 7.0 GHz (10.95–17.95 GHz) at1.83 mm matching thickness, while the 1 μm-75wt% sample at 1.96 mm matching thickness achieved the minimum reflection loss (RLmin) of −58.65 dB with an EAB of 6.1 GHz. Our results demonstrate that FeSiAl alloy powders are a novel, advanced high-performance absorbent with significant potential for a wide range of applications.

AB - This paper investigates the microwave absorption performance of FeSiAl alloy powders with varying particle sizes and loadings. Potential mechanisms underlying the microwave absorption of the studied materials are discussed. The results reveal that FeSiAl material exhibits a relatively weak dielectric loss, while the dominant electromagnetic wave dissipation stems from its magnetic loss. Detailed study indicates that decreasing in average particle size and increasing in loading ratio of FeSiAl absorbent effectively modify the dissipative ability of the samples. As the average particle size increases, the natural resonance frequency of FeSiAl alloy powders shifts to lower frequencies. By optimization, it is found that FeSiAl alloy absorber sample with nominal 500 nm absorbent particle size and 80 wt% loading (500 nm-80wt%) achieved an effective absorption bandwidth (EAB) of 7.0 GHz (10.95–17.95 GHz) at1.83 mm matching thickness, while the 1 μm-75wt% sample at 1.96 mm matching thickness achieved the minimum reflection loss (RLmin) of −58.65 dB with an EAB of 6.1 GHz. Our results demonstrate that FeSiAl alloy powders are a novel, advanced high-performance absorbent with significant potential for a wide range of applications.

KW - FeSiAl

KW - Magnetic loss

KW - Natural resonance

KW - Wave absorption

UR - https://www.scopus.com/pages/publications/105000348368

U2 - 10.1016/j.mtcomm.2025.112230

DO - 10.1016/j.mtcomm.2025.112230

M3 - Article

AN - SCOPUS:105000348368

SN - 2352-4928

VL - 45

JO - Materials Today Communications

JF - Materials Today Communications

M1 - 112230

ER -