重庆大学学报2017，Vol.40Issue(10)：53-59,7.DOI:10.11835/j.issn.1000-582X.2017.10.006
羰基铁粉形貌对吸波性能的影响
Effect of carbonyl iron powder morphology on the absorption properties of microwave
摘要
Abstract
Because carbonyl iron powder (CIP) has the advantages of good temperature stability,wide absorption band and strong design ability,it has been widely studied and used.In this paper,the electromagnetic wave absorption properties of two kinds of carbonyl iron powder which have the same basic parameters but different morphologies (spherical and dendritic) have been tested to study the influence of morphology on the absorption properties of carbonyl iron powder.The experimental results show that the morphology of carbonyl iron powder has a great influence on the electromagnetic wave absorption performance.Compared to the spherical CIP,the maximum reflection loss(RL) of the dendritic CIP increases by 94％,reaching-47.14 dB.Moreover,the frequencies corresponding to the minimum RL values of absorption peaks shift form 11.88 GHz (spherical CIP) to 6.44 GHz (dendritic CIP).This is because the dendritic morphology is conducive to form discontinuous network,increase the diffuse scattering of incident electromagnetic wave as well as form more interfacial charge polarization,resulting in enhancing the absorption intensity of electromagnetic wave.In addition,this study shows that the anisotropic structure is an effective way to improve the dielectric constant and dielectric loss,and obtain the absorber with the characteristics of wide absorption bandwidth and light weight.关键词
羰基铁粉/电磁吸波/颗粒形貌Key words
carbonyl iron powder/microwave absorption/particle morphology分类
通用工业技术引用本文复制引用
杨芾藜,侯兴哲,郑可,杨平安,余淼..羰基铁粉形貌对吸波性能的影响[J].重庆大学学报,2017,40(10):53-59,7.基金项目
国家自然科学资助项目基金(No.61203098) （No.61203098）
国网重庆市电力公司电力科学研究院资助项目(SGCQDK-00JS1500117).Supported by the National Natural Science Fund(61203098),the State Grid Electric Power Research Institute of Chongqing Electric Power Company(SGCQDK00JS1500117). （SGCQDK-00JS1500117）
