Effect of Dy, Pr on microwave absorption properties of Ce2Co17 alloy
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The RexCe2−xCo17 (Re = Dy, Pr, x = 0, 0.1, 0.2, 0.4) alloy was prepared by a combination use method of arc melting and high-energy ball milling and the phase structure, morphology and electromagnetic parameters were studied by X-ray diffraction (XRD), scanning electron microscopy (SEM) and vector network analyzer (VNA), respectively. The consequences demonstrate that the particle size has a decreasing tendency and the minimum absorption peak frequency offsets to a low frequency band with increasing Re (Dy, Pr). The reflectivity of DyxCe2−xCo17 (x = 0, 0.1, 0.2, 0.4) alloy increase first and then decrease with the addition of Dy content, and the Dy0.2Ce1.8Co17 alloy can achieve the minimum RL of − 39.16 dB (microwave absorption rate 99.988%) at 8 GHz with the thickness of 1.8 mm. The microwave absorbing properties of PrxCe2−xCo17 (x = 0, 0.1, 0.2, 0.4) alloy can be optimized with the doping of Pr and the minimum RL of Pr0.2Ce1.8Co17 can reach to − 36.8 dB (microwave absorption rate 99.979%) at 7.92 GHz, and the bandwidth of R < − 10 dB is 2.24 GHz with the best matching thickness condition of 1.8 mm.
Project supported by the National Natural Science Foundation of China (51361007), 2017 director fund of Guangxi Key Laboratory of Wireless Wideband Communication and Signal Processing (GXKL06170107), Guangxi Key Laboratory of Information Materials (161010-Z) and Innovation Project of GUET Graduate Education (2018YJCX87).
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