▎ 摘　　要

Ni(0.5)Coa(5)Fe(2)O(4)/graphene composites were synthesized successfully via one-step hydrothermal method. The crystal structure, morphology and corresponding elemental distribution, electromagnetic parameters and microwave absorption performances of the as-prepared composites were measured by XRD, SEM, TEM and VNA, respectively. The results indicated that the microwave absorbing performance can be obviously enhanced through the addition of graphene in a suitable range, the magnetic loss plays a dominant contribution for the microwave absorption of composites. The maximum reflection loss of -30.92 dB at 0.84 GHz with a -10 dB bandwidth over the frequency range of 0.58-1.19 GHz is obtained when the composite contains 12 wt% graphene and the thickness of sample is 4 mm. This investigation presents a simple method to prepare Ni(0.5)Co(0.5)Pe(2)O(4)/graphene composites with excellent microwave absorption performance in the low frequency band of 0.1-3 GHz.