MoS2/CoFe/C复合材料的制备和吸波性能

先水热合成MoS₂/CoFe₂O₄纳米复合吸波材料，再通过合理的物料配比并使用无水葡萄糖作为碳源和还原剂，使MoS₂/CoFe₂O₄复合材料在氮气氛中还原为MoS₂/CoFe/C三元纳米复合材料。对这种复合材料的形貌、相结构及电磁参数进行表征、模拟分析其最佳匹配厚度和吸波性能，研究了碳源浓度对复合材料的组成和性能的影响并根据弛豫理论讨论其吸波机制。结果表明，厚度为3 mm的这种复合材料在12.4 GHz处的最低反射损耗可达-42.9 dB；厚度为4 mm时低于-10 dB的频带宽度可达7.1 GHz。

Preparation and Microwave Absorbing Properties of MoS2/CoFe/C Composite

The composite absorbing material of MoS₂/CoFe/C was prepared via a two-step process, namely, the MoS₂/CoFe₂O₄ was hydro-thermally synthesized with anhydrous glucose as carbon source and reducing agent in a reasonable material ratio, which then was reduced to MoS₂/CoFe/C of ternary-nanometer flower structure in nitrogen atmosphere. The morphology, phase structure and electromagnetic parameters of the ternary nanomaterial were characterized, while the relation of the optimum matching thickness and absorbing property of the composite was assessed with computer simulation. The effect of glucose concentrations on the composition and properties of the composites were investigated. The absorption mechanism was discussed based on the Relaxation Polarization theory. When the thickness is 3 mm the lowest reflectivity of MoS₂/CoFe/C composite material at 12.4 GHz can reach -42.9 dB. When the thickness is 4 mm the reflectivity frequency of MoS₂/CoFe/C composite material is lower than -10 dB with bandwidth up to 7.1 GHz.