Journal
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
Volume 426, Issue -, Pages 114-120Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jmmm.2016.11.063
Keywords
Fe3O4/rGO composites; One-pot solvothermal method; Dielectric properties; Excellent microwave absorbing performances; Magnetic hysteresis
Funding
- Beijing Natural Science Foundation [2132039]
- National Natural Science Foundation of China [51101007, 51171007, 51271009]
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The Fe3O4 sub-microspheres have been embedded uniformly into the reduced graphene oxide (rGO) to form a new-type Fe3O4/rGO composites through a one-pot solvothermal method. The dielectric properties for these magnetic Fe3O4/rGO composites can be greatly tuned by their different rGO additions. A good impedance matching from the balanced dielectric and magnetic loss is achieved in the Fe3O4/rGO composites with 4 wt% rGO addition, which dominates their excellent microwave absorbing performances including the minimum reflection loss (RL) value of -45 dB at a frequency of 8.96 GHz with a sample thickness of 3.5 mm and an effective absorption bandwidth of 3.2 GHz (below -10 dB) superior to those of the most magnetic materials and carbon-based composites. The controlled Fe3O4/rGO composite structure also exhibits high chemical stability and low density, which shows great potential application in high-performance electromagnetic microwaveabsorbing materials.
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