Abstract
Abstract The Dy x Pr 1−x Ni 4 Fe (x=0.0, 0.1, 0.2, 0.3, 0.4) alloys were synthesized by arc-smelting and high energy ball milling method. The structure, morphology, particle size and electromagnetic parameters of the powder were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), laser diffraction-based particle size analyzer and vector network analyzer (VNA), respectively. The results reveal that the Dy x Pr 1−x Ni 4 Fe compounds are crystallized in PrNi 4 Fe structure. The minimum absorption peak frequency of Dy x Pr 1−x Ni 4 Fe shifts towards higher frequency region upon the Fe content. The minimum reflection loss of the Dy x Pr 1−x Ni 4 Fe alloys increases first and then decreases with increasing Dy substitution. The Dy 0.3 Pr 0.7 Ni 4 Fe alloy possess the best absorbing properties: the minimum reflection loss is −31.65 dB at 15.28 GHz with the best matching thickness d =1.0 mm and the reflection loss with the thickness ranging of 1.0–4.0 mm could reach −10 dB.
Published Version
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