摘要：【中文】本发明公开了一种石墨烯改性FeCo吸收剂的制备方法，包括如下步骤：分别称取质量分数为99.92%~99.88%的未改性FeCo合金粉末和质量分数为0.08%~0.12%的石墨烯粉体混合均匀，得到混合物；将混合物加入到分散剂中，然后进行超声分散；将分散后的混合物置于蒸发仪中蒸发至胶体状态；对胶体状态混合物进行球磨，对球磨后的混合物洗涤，将洗涤后的混合物加入到分散剂中进行分散，之后将混合物中的分散剂蒸发掉；最后对蒸发处理后的混合物进行烘干处理，即得到改性的FeCo吸收剂。本发明通过掺杂石墨烯粉体对FeCo吸收剂进行改性，不仅提高了吸收剂的介电损耗，还能改善其在低频范围内的吸波性能，提高吸收剂的阻抗匹配，有效降低目标物体的低频波段特征信号。 【EN】The invention discloses a preparation method of a graphene modified FeCo absorbent, which comprises the following steps: respectively weighing and uniformly mixing unmodified FeCo alloy powder with the mass fraction of 99.92-99.88% and graphene powder with the mass fraction of 0.08-0.12% to obtain a mixture; adding the mixture into a dispersing agent, and then carrying out ultrasonic dispersion; putting the dispersed mixture into an evaporator to evaporate to a colloid state; ball-milling the mixture in the colloid state, washing the mixture after ball-milling, adding the washed mixture into a dispersing agent for dispersing, and then evaporating the dispersing agent in the mixture; and finally, drying the mixture subjected to the evaporation treatment to obtain the modified FeCo absorbent. According to the invention, the FeCo absorbent is modified by doping the graphene powder, so that the dielectric loss of the absorbent is improved, the wave absorbing performance of the absorbent in a low-frequency range is improved, the impedance matching of the absorbent is improved, and the low-frequency wave band characteristic signal of a target object is effectively reduced.