史胜,赵雨航,汪梓迅,刘磊春,陈文旗,孙京丽,陈一,袁勇.羰基铁抗氧化改性对雷达隐身吸波性能的影响[J].表面技术,2025,54(10):266-274.
SHI Sheng,ZHAO Yuhang,WANG Zixun,LIU Leichun,CHEN Wenqi,SUN Jingli,CHEN Yi,YUAN Yong.Effect of Carbonyl Iron Antioxidant Modification on Radar Stealth Wave-absorbing Properties[J].Surface Technology,2025,54(10):266-274 |
| 羰基铁抗氧化改性对雷达隐身吸波性能的影响 |
| Effect of Carbonyl Iron Antioxidant Modification on Radar Stealth Wave-absorbing Properties |
| 投稿时间：2025-02-26 修订日期：2025-04-14 |
| DOI：10.16490/j.cnki.issn.1001-3660.2025.10.022 |
| 中文关键词: 羰基铁 TEOS 抗氧化性 雷达隐身吸波 |
| 英文关键词:carbonyl iron TEOS oxidation resistance radar stealth wave absorption |
| 基金项目: |
| 作者 | 单位 |
| 史胜 | 上海航天精密机械研究所，上海 201600 |
| 赵雨航 | 上海航天精密机械研究所，上海 201600 |
| 汪梓迅 | 上海航天精密机械研究所，上海 201600 |
| 刘磊春 | 上海航天精密机械研究所，上海 201600 |
| 陈文旗 | 上海航天精密机械研究所，上海 201600 |
| 孙京丽 | 上海航天精密机械研究所，上海 201600 |
| 陈一 | 上海航天精密机械研究所，上海 201600 |
| 袁勇 | 上海航天精密机械研究所，上海 201600 |
|
| Author | Institution |
| SHI Sheng | Shanghai Spaceflight Precision Machinery Institute, Shanghai 201600, China |
| ZHAO Yuhang | Shanghai Spaceflight Precision Machinery Institute, Shanghai 201600, China |
| WANG Zixun | Shanghai Spaceflight Precision Machinery Institute, Shanghai 201600, China |
| LIU Leichun | Shanghai Spaceflight Precision Machinery Institute, Shanghai 201600, China |
| CHEN Wenqi | Shanghai Spaceflight Precision Machinery Institute, Shanghai 201600, China |
| SUN Jingli | Shanghai Spaceflight Precision Machinery Institute, Shanghai 201600, China |
| CHEN Yi | Shanghai Spaceflight Precision Machinery Institute, Shanghai 201600, China |
| YUAN Yong | Shanghai Spaceflight Precision Machinery Institute, Shanghai 201600, China |
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| 中文摘要: |
| 目的 改善片状羰基铁(Flaky Carbonyl Iron，FCI)在200 ℃环境下的抗氧化性，保证其电磁性能和对雷达电磁波的吸收性能。方法 采用溶胶-凝胶法，使用正硅酸乙酯(Tetraethyl Orthosilicate，TEOS)对FCI进行SiO2包覆改性。通过矢量网络分析仪对FCI包覆改性前后的复电磁参数进行表征，对比了TEOS添加量对SiO2包覆改性FCI电磁性能的影响，分析了在200 ℃下SiO2包覆层对FCI雷达隐身吸波性能的影响;采用扫描电镜(SEM)、透射电镜(TEM)、傅里叶变换红外光谱仪和X射线荧光光谱仪对FCI包覆改性前后的元素组成和微观结构进行了表征和分析。结果 复电磁参数分析结果表明，当TEOS添加量为10 mL时，SiO2包覆改性FCI的电磁性能最优。由电镜微观结构和红外谱图分析可知，FCI表面成功包覆一层均匀、致密的SiO2，其厚度在40~45 nm。反射损耗模拟结果表明，SiO2包覆层的存在使FCI在200 ℃环境下保持了良好的雷达电磁波吸波效果，在6.3~14.6 GHz频带宽度下反射损耗(Reflective Loss，RL)≤−5 dB。结论 TEOS对FCI的表面改性能够改善其在200 ℃环境下的抗氧化性，保证其雷达隐身吸波性能，在中高温隐身领域具有良好的应用前景。 |
| 英文摘要: |
| This is a surface modification technology that uniformly coats a layer of inorganic oxide on the surface of flaky carbonyl iron (FCI) through the sol-gel method, improving its high-temperature oxidation resistance without reducing its electromagnetic and wave-absorbing properties. Due to its excellent magnetic loss performance, carbonyl iron is often used as a filler in radar stealth wave-absorbing materials. However, at 200 ℃, it easily reacts with oxygen and moisture in the air to form non-magnetic or weakly magnetic oxides, resulting in a significant decline in magnetic loss capacity and wave-absorbing properties. The work aims to study the effect of SiO2-coated modified carbonyl iron on its high-temperature oxidation resistance and wave-absorbing properties. Four clean flasks were taken, and 368 mL of ethanol, 92 mL of deionized water, 5.3 mL of ammonia water and 2 g of flaky carbonyl iron were added to each flask. After ultrasonic dispersion for 15 minutes, different amounts (5, 10, 15 and 20 mL) of tetraethyl orthosilicate (TEOS) were dropped into the flasks respectively. At room temperature, the reaction solution was stirred uniformly for 30 minutes. Then, the carbonyl iron was adsorbed on the inner wall of the flask with a magnet, and the mixed reaction solution was filtered out. The product was washed three times with anhydrous ethanol and dried to obtain SiO2-coated carbonyl iron (denoted as FCI@SiO2). The elemental composition and microstructure of FCI before and after coating modification were characterized and analyzed by scanning electron microscopy (SEM), transmission electron microscopy (TEM), Fourier transform infrared spectrometer and X-ray fluorescence spectrometer. The complex electromagnetic parameters of FCI before and after coating modification were characterized by vector network analyzer. The effect of TEOS addition amount on the electromagnetic properties and wave-absorbing properties of FCI was compared. The effect of SiO2 coating layer on the electromagnetic properties and stealth wave-absorbing properties of FCI at 200 ℃ was also compared. The results of electromagnetic parameter analysis showed that when the addition amount of TEOS was 10 mL, the electromagnetic performance of FCI was optimal. The analysis of electron microscope microstructure and infrared spectrum indicated that a uniform and dense SiO2 layer was successfully coated on the surface of FCI, with a thickness of 40-45 nm. The simulation results of reflection loss showed that the existence of the SiO2 coating layer could significantly improve the oxidation resistance and radar electromagnetic wave-absorbing effect of FCI at 200 ℃. The prepared absorbing material (with a mass fraction of FCI@SiO2 of 40%) had a minimum reflection loss (RL) of −10.4 dB (f = 10.59 GHz), and within the frequency band of 6.3-14.6 GHz, it achieved radar stealth wave-absorbing properties with a reflection loss ≤ −5 dB. This is a technology for surface coating modification of carbonyl iron, which hinders its oxidation reaction with oxygen in the air by generating a SiO2 layer on its surface, avoids the loss of magnetism effect in a high-temperature environment of 200 ℃, and ensures the play of radar stealth wave absorption. |
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