Ni(NO_3)_2浓度对Ni/还原氧化石墨微观结构及微波吸收性能的影响  

Effect of Nickel Nitrate Concentration on Microstructure and Microwave Absorbing Property of Ni/RGO Nanocomposite Material

作　　者：祝海[1] 杨丽[1] 刘洪波[1] 陈惠[1] 夏笑虹[1] 

机构地区：[1]湖南大学材料科学与工程学院,长沙410082

出　　处：《无机材料学报》2016年第11期1223-1229,共7页Journal of Inorganic Materials

基　　金：湖南省科技计划(2014GK3153)~~

摘　　要：以Ni(NO_3)_2为Ni源,利用液相浸渍法在氧化石墨层间吸附Ni^(2+),通过H2热还原制备出Ni/还原氧化石墨纳米复合材料。采用扫描电子显微镜(SEM)、X射线衍射仪(XRD)及网络矢量分析仪等对样品的结构及性能进行分析和表征,研究了Ni(NO_3)_2浓度对材料微观形貌及电磁性能的影响。结果表明,所制备材料为纳米级Ni颗粒与RGO的复合体,具有优良的微波吸收性能;当Ni(NO_3)_2浓度为1.5 mol/L时,材料电磁吸收性能最佳,在2~18 GHz频率范围内,材料厚度为2 mm时,反射损耗(RL)小于–5 d B的频率范围可达9 GHz,RLmax可达–40 d B。A technique for obtaining reduced graphite oxide （RGO） with Ni nanoparticle dispersed on the surface via chemical vapor deposition （CVD） method was reported. XRD and SEM observations were carried out to confirm the microstructure of Ni/RGO composite. Magnetic property of Ni/RGO was characterized by vector network analyzer. The influence of Ni（NO3）2 concentration on micromorphology and microwave absorbing property were also discussed. As the concentration of Ni（NO3）2 is 1.5 mol/L, the range of the reflection loss （RL） less than-5 dB is 9 GHz, of which the max value reaches -40 dB.

关 键 词：NI 氧化石墨 纳米复合材料 微波吸收 

分 类 号：TB333[一般工业技术—材料科学与工程]