Effect of Tb Doping Amount on Microwave Absorption Performance of Dy2Co17 Alloys

Due to the frequent use of electronic equipment, electromagnetic radiation pollution has become a prominent problem. The use of microwave-absorbing materials can effectively solve this phenomenon. In this study, flaky Dy2-xCo17Tbx alloy powders were prepared by vacuum smelting, and the microwave absorption performance was investigated by changing the Tb doping amount and matching thickness. The results show that the magnetic loss and dielectric loss are improved to a certain extent with the doping of Tb, and the absorption peak value moves to the low-frequency region. At the same time, the saturation magnetization (Ms) decreases with the increase in Tb doping. When x = 0.2 and the matching thickness is 1.6 mm, the minimum reflection loss (RLmin) value is −40.9 dB at 10.08 GHz, and the effective absorption bandwidth (EAB) is 1.6 GHz (9.28~10.88 GHz). In general, Dy2-xCo17Tbx alloy powders have good microwave absorption performance in the X band.