| 胡晶,谢国治,顾家新,谌静,谭鑫,王瑞,邢贝贝.多元助剂改性羰基铁粉雷达波低频吸波性能研究[J].材料导报,2018,32(4):520-524 |
| 多元助剂改性羰基铁粉雷达波低频吸波性能研究 |
| Low Frequency Radar Wave Absorbing Performance of Carbonyl Iron Powder Modified by Compound Auxiliary Agents |
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| DOI：10.11896/j.issn.1005-023X.2018.04.002 |
| 中文关键词: 表面改性 电磁参量 电磁匹配 反射损耗 |
| 英文关键词: surface modification, electromagnetic parameter, electromagnetic matching, reflection loss |
| 基金项目:基金项目:南京邮电大学引进人才科研启动基金(NY213016)；国家自然科学基金(11304159) |
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| 中文摘要: |
| 采用三种处理剂对羰基铁粉样品进行表面复合改性,研究了多元助剂对羰基铁粉样品表面改性后的微观结构及电磁参量的影响。结果表明,多元助剂的使用使羰基铁粉表面形成了一层致密的有机绝缘薄膜,能有效降低羰基铁粉的复介电常数,增加复磁导率虚部,提高吸波材料的电磁匹配性能,改善吸收剂的低频吸收效果。根据传输线理论计算吸波材料的反射损耗(Reflection loss, RL),在厚度为2 mm时,三元助剂改性羰基铁粉的反射损耗峰值在2 GHz附近达到-15 dB,在RL<-10 dB的有效吸收频宽为1 GHz(1.6~2.6 GHz),具有较好的雷达波低频吸波性能。 |
| 英文摘要: |
| Three kinds of treatment agents were used to modify the surface of carbonyl iron powder samples,and the effect of compound auxiliary agents on microstructure and electromagnetic parameters of carbonyl iron powder samples after surface modification were studied. The results showed that a layer dense and uniform organic insulating film was formed on the surface of carbonyl iron powder by applying the compound auxiliary agents, which could reduce the permittivity of carbonyl iron powder effectively,increase the imaginary permeability,enhance the electromagnetic matching performance of absorbing materials and ameliorate the low frequency absorption effect of absorber. According to the transmission line theory,the reflection loss (RL) of absorbing material was calculated.When the thickness was 2 mm,the reflection loss peak reached -15 dB near 2 GHz for carbonyl iron powder modified by three kinds of auxiliary agents, the effective absorption bandwidth was 1 GHz (1.6-2.6 GHz) when the RL<-10 dB.It indicated that the carbonyl iron powder had preferable low frequency absorbing performance for radar wave. |
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