电子元件与材料2024，Vol.43Issue(6)：668-677,10.DOI:10.14106/j.cnki.1001-2028.2024.0129
羰基铁粉/石墨烯复合粉体的制备及其电磁性能研究
The preparation and electromagnetic absorption performance of carbonyl iron-graphene composites
梁莹 1李天天 1李菊红 2孙兴阳 1王玉3
作者信息
- 1. 中国航发沈阳黎明航空发动机有限责任公司,辽宁 沈阳 110043
- 2. 北京服装学院,北京 100029
- 3. 中国地质科学院国家地质实验测试中心,北京 100037
- 折叠
摘要
Abstract
The composite of graphene and carbonyl iron powder not only breaks through the snooker limit of iron powder as an absorber,but also improves its electromagnetic impedance matching characteristics to some extent.In this paper,graphene and lamellar carbonyl iron powder were lamellarly composited using aminophosphoric acid as a linker,and carbonyl iron powder/graphene composite wave-absorbing powders with dielectric frequency dispersive properties were obtained by a one-step method.The effects of different synthesis conditions(content of modified graphene,reaction temperature,and content of aminophosphoric acid)on the electromagnetic parameters and reflective losses of carbonyl iron powder/graphene composite wave-absorbing materials were investigated.The results show that due to the introduction of graphene,the electromagnetic impedance matching performance of the composite powders is significantly enhanced,exhibiting good wave absorption performance.When the graphene oxide(GO)content is 1%(mass fraction),the minimum reflection loss value(RLmin)of the composite powders(thickness of 3.7 mm)at 4.23 GHz is-43.90 dB,and the effective absorption bandwidth(RL≤-10dB)is10.4 GHz(3.63-14.03 GHz).When the reaction temperature is 80℃,the composite powder shows good wave absorption efficiency.When the thickness is 4.5 mm,the minimum reflection loss value of the composite powder at 2.3 GHz reaches-42.92 dB,and the effective absorption bandwidth(RL≤-10 dB)is 6.7 GHz(2.0-8.7 GHz).The addition of APSA results in a significant increase in the conductivity of the composite powders,while the dielectric loss is enhanced.When 0.5%(mass fraction)APSA is added,the composite powder has the strongest conductivity,stable dielectric loss performance,and good absorption modification effect.The minimum reflection loss is-42.92 dB,and its corresponding effective absorption bandwidth(RL≤-10 dB)is 6.7 GHz(2.1-8.8 GHz)within 2-18 GHz.关键词
石墨烯/羰基铁/纳米复合材料/吸波性能Key words
graphene/carbonyl iron/nanocomposites/electromagnetic wave absorption performance分类
通用工业技术引用本文复制引用
梁莹,李天天,李菊红,孙兴阳,王玉..羰基铁粉/石墨烯复合粉体的制备及其电磁性能研究[J].电子元件与材料,2024,43(6):668-677,10.
