ZnO-羰基铁复合纳米粒子的吸波特性  

Microwave Absorption Properties of ZnO-carbonyl Iron Nanocomposites

作　　者：周长[1] 方庆清[1] 闫方亮[1] 刘艳美[1] 吕庆荣[1] 吴克跃[1] 张启平[1] 张翰铭[1] 

机构地区：[1]安徽大学物理与材料科学学院,安徽合肥230036

出　　处：《磁性材料及器件》2010年第5期27-30,63,共5页Journal of Magnetic Materials and Devices

基　　金：安徽省自然科学基金资助项目(090414177)

摘　　要：采用高能球磨法制备了氧化锌-羰基铁复合体吸波剂，研究了材料在0-20GHz频率下的吸波特性。实验表明，随着球磨时间的延长，吸波剂颗粒尺寸减小，吸收峰强度增高。通过对比不同样品的吸波特性发现，氧化锌作为介电材料包覆在羰基铁颗粒上，使得吸收谱向低频方向扩展，吸波效果明显增强。所制备的球磨30h的氧化锌-羰基铁3mm厚样品的-5dB带宽达到10．8GHz，-8dB带宽达到5．1GHz，最大吸收峰为-30dB。We fabricated zinc oxide-carbonyl iron composite nanopparticles by high-energy ball milling and studied their electromagnetic parameters at frequency range of 0-20GHz. With prolonging the ball milling time, the particle size of absorber decreases, and the intensity of absorption peak increases. Comparison of absorbing properties, between different samples indicated that ZnO as a kind of dielectric material covering carbonyl iron particles, makes the absorption spectrum extend to the lower frequency, and enhance absorption obviously. The 30h-milled 3mm-thickness sample of ZnO-carbonyl iron has 10.8GHz bandwidth of -5dB, 5.1GHz bandwidth of --8dB, and maximum absorbing peak of --30dB.

关 键 词：羰基铁 氧化锌 吸波材料 磁损耗 电极化损耗 

分 类 号：TB385[一般工业技术—材料科学与工程] TM25[电气工程—电工理论与新技术]