铁磁性Ni纳米粒子的电磁波吸收性能  

Microwave Absorption Characteristics of the Ferromagnetic Ni Nanoparticles

作　　者：张雪峰[1] 王威娜[1] 李哲男[1] 董星龙[1] 

机构地区：[1]大连理工大学材料系,三束改性国家重点实验室,辽宁大连116023

出　　处：《纳米科技》2005年第5期23-26,34,共5页

基　　金：国家自然科学基金资助项目（50371012）辽宁省自然科学基金（20032125）

摘　　要：文章研究了利用直流电弧等离子法在760Tort（H2＋Ar）混合气氛下制备Ni纳米粒子。通过Phillips EM420型透投射电子显微镜对纳米粒子进行形貌表征，并通过矢量网络分析仪，利用同轴方法对不同成分含量的Ni纳米粒子／固体石蜡复合材料进行了电磁参数的测定。结果证明：在16GHz频率处，60wt．％Ni纳米复合材料的电磁参数出现突变。利用实验所得到的数据模拟了Ni复合材料不同厚度涂层的吸波性能，当Ni纳米粒子成分含量达到60wt．％时，复合材料的吸收峰值R达到-28．0dB，具有较好的吸波效果。The Ni nanoparticles were prepared by DC arc plasma method with a mixture of H2 and Ar gas atmosphere. The distinct characterizations of the Ni particles were investigated using a transmission electron microscopy （TEM） . The electromagnetic characteristics of the Ni nanoparticles were further measured using an Agilent 8722ES microwave network analyzer in 2 - 18 GHz band. The experimental results show that the permittivity and permeability of the Ni nanoparticles present a steep variety at 16 GHz. The reflection loss R （dB） of the composites were simulated with the experimental data. When the content of Ni nanoparticles is 60wt. %, the absorption peak value can reach - 28.0 dB, and this compesites present more excellent properties than others.

关 键 词：直流电弧等离子体法 Ni纳米粒子 吸波材料 

分 类 号：TM25[一般工业技术—材料科学与工程] O451[电气工程—电工理论与新技术]