杨平安,黄宇轩,李锐,孙杨,黄鑫,寿梦杰,杨健健.羰基铁粉复合多孔吸波涂层的优化设计[J].表面技术,2021,50(11):155-164.
YANG Ping-an,HUANG Yu-xuan,LI Rui,SUN Yang,HUANG Xin,SHOU Meng-jie,YANG Jian-jian.Optimization Design of Carbonyl Iron Powder Composite Porous Absorbing Coating[J].Surface Technology,2021,50(11):155-164 |
| 羰基铁粉复合多孔吸波涂层的优化设计 |
| Optimization Design of Carbonyl Iron Powder Composite Porous Absorbing Coating |
| 投稿时间：2021-01-25 修订日期：2021-04-23 |
| DOI：10.16490/j.cnki.issn.1001-3660.2021.11.014 |
| 中文关键词: 吸波涂层 羰基铁粉 三维多孔结构 轻质 宽频 |
| 英文关键词:microwave absorbing coating carbonyl iron powder three dimensional porous structure light weight broadband |
| 基金项目:国家自然科学基金项目(61901073，52075063);重庆市技术创新与应用发展专项重点项目(cstc2019jscx-fxydX0085);重庆邮电大学博士科研启动基金项目(A2018-10) |
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| Author | Institution |
| YANG Ping-an | School of Automation, Chongqing University of Posts and Telecommunications, Chongqing 400065, China |
| HUANG Yu-xuan | School of Automation, Chongqing University of Posts and Telecommunications, Chongqing 400065, China |
| LI Rui | School of Automation, Chongqing University of Posts and Telecommunications, Chongqing 400065, China |
| SUN Yang | School of Automation, Chongqing University of Posts and Telecommunications, Chongqing 400065, China |
| HUANG Xin | School of Automation, Chongqing University of Posts and Telecommunications, Chongqing 400065, China |
| SHOU Meng-jie | School of Automation, Chongqing University of Posts and Telecommunications, Chongqing 400065, China |
| YANG Jian-jian | Research Institute of Chemical Defence, Academy of Military Sciences, Wuhan 710018, China |
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| 中文摘要: |
| 目的 解决吸波剂羰基铁粉颗粒(CIP)构成的吸波涂层存在密度较大、涂层厚度过大的问题。方法 利用三维多孔结构降低复合吸波涂层的密度并改善阻抗失配，从而构筑轻质宽频羰基铁粉复合吸波涂层。利用有限元分析软件建立了羰基铁粉/石蜡复合多孔吸波涂层的仿真模型，通过仿真研究了三维多孔结构的孔隙率、孔径和孔隙分布方式对复合吸波涂层性能(最小反射损耗、有效吸收带宽、峰值吸收频率和密度)的影响规律，揭示了羰基铁粉多孔结构的吸波机理，并确定了具有最佳综合性能的羰基铁粉三维多孔复合吸波涂层的结构参数。结果 随着孔隙率的增加，涂层密度减小且峰值吸收频率向高频移动;而随着孔径的减小，涂层除峰值吸收频率向高频移动外，最小反射损耗和有效吸收带宽分别呈减低和增加的趋势，吸波性能得到有效改善。孔隙分布方面，在随机、有序、梯度递减和梯度递增4种分布方式中，梯度递减分布表现出最佳的吸波性能。相较于无孔结构，羰基铁粉质量分数为75%、孔隙率为16%、孔径为0.325 mm、孔隙呈梯度递减分布的三维多孔涂层，其有效吸收带宽(RL<–10 dB)拓展了49.3%(从4.10 GHz增加到6.12 GHz)，密度降低了4%(从2.71 g/cm3降低到2.6 g/cm3)，而最小反射损耗仅仅损失0.7%。结论 多孔结构的引入可以实现羰基铁粉涂层轻质、宽频吸波的目的。 |
| 英文摘要: |
| In view of the defects of high density and heavy coating thickness in the absorbing coating composed of carbonyl iron powder (CIP), one of the most commonly used absorbing agents, a three-dimensional porous structure was proposed to reduce the density of the composite absorbing coating and improve the impedance mismatch, so as to construct a light and broadband carbonyl iron powder composite absorbing coating. The simulation model of carbonyl iron powder/paraffin composite porous microwave absorbing coating was established by using finite element analysis software. The effects of porosity, pore size and pore distribution on the properties (minimum reflection loss, effective absorption bandwidth, peak absorption frequency and density) of three-dimensional porous structure were studied by simulation. The wave absorbing mechanism of carbonyl iron powder porous structure was revealed, and the structural parameters of carbonyl iron powder three-dimensional porous composite microwave absorbing coating with the best comprehensive properties were determined. The results show that with the increase of porosity, the density of the coating decreases and the peak absorption frequency moves to high frequency; with the decrease of pore diameter, except for the peak absorption frequency of coating moving to high frequency, the minimum reflection loss and effective absorption bandwidth decreases and increases respectively, which can effectively improve the microwave absorption performance; in terms of pore distribution, the gradient decreasing distribution shows the best absorbing performance among the four distribution modes of random, ordered, gradient decreasing and gradient increasing. Compared with the non porous structure, the three-dimensional porous coating with 75% carbonyl iron powder, 16 vol.% porosity, 0.325 mm pore size and gradient decreasing, has a 49.3% increase in effective absorption bandwidth (RL<–10 dB), and a 4% decrease in density (from 2.71 g/cm3 to 2.6 GHz), meanwhile, the minimum reflection loss is only 0.7%. The introduction of porous structure can make the carbonyl iron powder coating light and broadband. |
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