CAJ | 학술논문

为了提高石墨吸收剂的阻抗匹配能力,改善其吸波性能,采用化学镀法对石墨表面进行镀Ni-P改性.研究了镀层的相组成、形貌、成分和样品的电磁吸波性能.结果表明:石墨表面包覆了一层非晶态Ni-P镀层;与原始石墨相比,在2 GHz时,镀Ni-P非晶石墨复合材料的ε′和ε″分别明显降低至6.6和0.4,μ′和μ″分别略微增加至1.08和0.26,其吸收频带得到展宽,在14 GHz的最小反射率为-7.0 dB,反射率小于-5 dB的吸收频带宽达4 GHz.
위료제고석묵흡수제적조항필배능력,개선기흡파성능,채용화학도법대석묵표면진행도Ni-P개성.연구료도층적상조성、형모、성분화양품적전자흡파성능.결과표명:석묵표면포복료일층비정태Ni-P도층;여원시석묵상비,재2 GHz시,도Ni-P비정석묵복합재료적ε′화ε″분별명현강저지6.6화0.4,μ′화μ″분별략미증가지1.08화0.26,기흡수빈대득도전관,재14 GHz적최소반사솔위-7.0 dB,반사솔소우-5 dB적흡수빈대관체4 GHz.
In order to increase the properties of impedance matching and microwave absorption of graphite absorbent, electroless plating was used to modify the surface of graphite by coating Ni-P on them. The phase composition, morphology, composition of the coating and electromagnetic and microwave absorption properties of obtained samples were studied. The results show that a layer of amorphous Ni-P is coated onto the surface of graphite; compared with primitive graphite, at 2 GHz, the real permittivity ε′ and imaginary permittivity ε″ of the Ni-P coated graphite composites are notably reduced to 6.6 and 0.4, respectively. The real permeability μ′ and imaginary permeability μ″ of the Ni-P coated graphite composites are slightly improved to 1.08 and 0.26, respectively. Their absorption bandwidth is widened. The minimum reflectivity is -7.0 dB at 14 GHz, and the absorption bandwidth is 4 GHz under -5 dB of reflectivity.