| Popis: |
Nd10.2Fe89.8-xCx (x=0, 2.6, 5.2, 7.8) powders were prepared by arc smelting and ball milling. The structure and morphology of the powders were investigated by X-ray diffraction (XRD) and scanning electron microscopy (SEM). The electromagnetic parameters of the powders were measured by vector network analyzer (VNA) at room temperature. It is found that the microwave absorbing properties of Nd10.2Fe89.8-xCx (x = 0, 2.6, 5.2, 7.8) depend sensitively on the compositions. The minimum absorption peak frequency shifts to the higher region upon the C content. The minimum reflectivity value of Nd10.2Fe84.6C5.2 can reach −13.2 dB at 5.2 GHz and the bandwidth of R |
