CAJ | 학술논문

基于双膜分散技术与水热法相结合的思想，在较低温度条件下，短时间内合成了还原的氧化石墨烯(rGO)/CoFe2O4纳米复合材料，并研究了rGO/CoFe2O4的吸波性能。通过 XRD、SEM、EDS、TEM、TG/DSC、IR测试手段对rGO/CoFe2O4进行表征，采用矢量网络分析仪测定了复合材料在2～18GHz范围内复介电常数和复磁导率的变化，并利用计算机模拟材料在不同厚度下电磁波的衰减性能。结果表明：在透明绢丝状石墨烯的表面及边缘负载了粒度均匀的纳米 CoFe2O4粒子；单一纳米 CoFe2O4的反射率损耗为?3.59dB。而 mCoFe2O4∶mGO为10∶7的样品的吸波层厚度在2～3mm之间变化时，微波吸收效果显著增强，厚度为3mm时，出现最大微波衰减值?9.2dB，并且微波吸收峰随着吸波层厚度的增加而向低频移动。相比于单一纳米 CoFe2O4粉体， rGO/CoFe2O4纳米复合材料对电磁波的吸收效果有了大幅度的提高。
기우쌍막분산기술여수열법상결합적사상，재교저온도조건하，단시간내합성료환원적양화석묵희(rGO)/CoFe2O4납미복합재료，병연구료rGO/CoFe2O4적흡파성능。통과 XRD、SEM、EDS、TEM、TG/DSC、IR측시수단대rGO/CoFe2O4진행표정，채용시량망락분석의측정료복합재료재2～18GHz범위내복개전상수화복자도솔적변화，병이용계산궤모의재료재불동후도하전자파적쇠감성능。결과표명：재투명견사상석묵희적표면급변연부재료립도균균적납미 CoFe2O4입자；단일납미 CoFe2O4적반사솔손모위?3.59dB。이 mCoFe2O4∶mGO위10∶7적양품적흡파층후도재2～3mm지간변화시，미파흡수효과현저증강，후도위3mm시，출현최대미파쇠감치?9.2dB，병차미파흡수봉수착흡파층후도적증가이향저빈이동。상비우단일납미 CoFe2O4분체， rGO/CoFe2O4납미복합재료대전자파적흡수효과유료대폭도적제고。
rGO/CoFe2O4 nanocomposites were prepared at a lower temperature in a short period of time based on the combination of double-membrane dispersion technology and hydrothermal method in this paper,and its wave absorbing properties were also studied. Characterization was carried out by XRD, SEM,EDS,TEM,TG/DSC,and IR testing methods. Vector network analyzer was used to measure the changes of complex permittivity and complex permeability of the composites in the frequency range from 2GHz to 18GHz,and the microwave attenuation performance were simulated by computer under different thicknesses of materials. The results showed that uniform size of CoFe2O4 nanoparticles were loaded on the surface and the edge of transparent and silk-like graphene sheet; the reflectance loss of single CoFe2O4 was only?3.59dB,while the microwave absorption of the sample,with quality ratio of CoFe2O4/GO being 10∶7,was significantly enhanced when absorber thicknesses between 2mm and 3mm. The maximum microwave frequencies attenuation value of this sample can be obtained at?9.2dB at absorber thickness of 3mm,and the microwave absorption peak moved to the lower frequency region along with the increasing of thickness of absorbing layer. Comparing to single nanometer CoFe2O4 power,the absorption of electromagnetic waves for rGO/CoFe2O4 nanocomposites has been increased significantly.