Journal
JOURNAL OF ALLOYS AND COMPOUNDS
Volume 973, Issue -, Pages -Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2023.172843
Keywords
Microwave absorption; Magnetic absorbents; SmCo5/Sm2Co17; Reflection loss
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In this study, a novel magnetic composite consisting of SmCo5 and Sm2Co17 was developed using a reduction diffusion method. The micromorphology and binary phase ratios of the composite could be easily controlled by adjusting the reactant concentrations. The composite exhibited excellent microwave absorption properties at a thickness of 2.0 mm, attributed to its adjustable magnetic phases and distinctive particle shape.
Magnetic materials with highly efficient microwave absorption properties, crucial for dealing with the advanced wireless communications and radar detections, have been garnering significant attentions. Rare-earth transition -metal compounds were researched as the potential candidates but still suffer from the disadvantages of complex powder metallurgy process and low serving frequencies. In this work, the novel magnetic composites consisting of SmCo5 and Sm2Co17 are developed by a reduction diffusion method. The micromorphology and the binary phase ratios of the SmCo5/Sm2Co17 could be easily modulated by simply altering the reactant concentrations. Consequently, an optimum reflection loss of -50.2 dB and broad absorption bandwidth of 4.95 GHz at a thickness of only 2.0 mm are achieved. The improved microwave absorption properties of the SmCo5/Sm2Co17 binary-phase magnetic absorbents can be attributed to their adjustable magnetic phases and the distinctive flaky particle shape, which greatly enhance microwave absorption capabilities. This work demonstrated a feasible reduction diffusion method and proposed a new strategy of designing binary-phase magnetic materials to achieve high microwave absorption properties.
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