【作者】 张雪峰； 刘圆圆； 黄昊； 王威娜； 董星龙；

【Author】 ZHANG Xue-feng, Liu Yuan-yuan, HUANG Hao, WANG Wei-na, DONG Xing-long (College of Material Science and Engineering, Center forNano Materials and Science of Technology, Dalian 116023, China)

【机构】 大连理工大学材料科学与工程学院,纳米材料科学研究中心；

【摘要】 利用直流电弧等离子法分别在(H2+Ar)混合气氛和(CH4)气氛下制备了Co、Ni及Co(C)、Ni(C) 复合纳米粒子．利用矢量网络分析仪,利用同轴波导的方法对金属纳米粒子进行了电磁参数的测定。通过计算机模拟研究,在2-8GHz频率范围内,Co(c)、Ni(C) 复合纳米粒子表现出优越的吸波性能。Ni(C)复合纳米粒子吸波效果优异很多,吸收峰在8 GHz频段上出现,在7-10GHz吸收值高于10 dB。更多还原

【Abstract】 The DC arc plasma was used to prepare Carbon-coated Co, Ni nanoparticles and pure Co, Ni nanoparticles, respectively. The distinct characterization was investigated by transmission electron microscopy (TEM). The electromagnetic properties of nanoparticles were further measured by Agilent 8722ES microwave network analyzer in 2-18GHz range. Carbon-coated Co, Ni nanoparticles present more excellent electromagnetic wave absorptive properties. The reflection loss R (dB) of Ni(C) composite materials can reach to 10 dB from7-10 GHz with 2 mm thickness.更多还原