| SiO_2包覆羰基铁的微波吸收性能研究 |
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| 引用本文： | 朱云斌,卿玉长,贾舒,周万城,罗发,朱冬梅.SiO_2包覆羰基铁的微波吸收性能研究[J].材料导报,2010,24(2). |
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| 作者姓名： | 朱云斌 卿玉长 贾舒 周万城 罗发 朱冬梅 |
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| 作者单位： | 东南大学交通学院,南京,210096;西北工业大学凝固技术国家重点实验室,西安,710072 |
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| 基金项目： | 凝固技术国家重点实验室(西北工业大学)自主研究课题 |
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| 摘 要： | 以硅溶胶为前驱体,快速制备出SiO2包覆羰基铁吸收剂,研究了SiO2包覆对其热性能、电磁和吸波性能的影响。热分析结果表明,SiO2包覆羰基铁的抗氧化性能显著提高。与未包覆羰基铁相比,SiO2包覆羰基铁的介电常数和磁导率都有所下降。反射率结果表明,包覆后羰基铁在X波段内具有较好的吸波效果,当包覆后羰基铁质量分数为70%、涂层厚度为1.8mm时,涂层在8.2～12.4GHz频率范围内的反射率均小于-10dB。
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| 关 键 词： | 羰基铁 SiO_2 电磁性能 吸波性能 |
Microwave Absorbing Properties of SiO_2 Coated Carbonyl Iron Particles |
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| ZHU Yunbin,QING Yuchang,JIA Shu,ZHOU Wancheng,LUO Fa,ZHU Dongmei.Microwave Absorbing Properties of SiO_2 Coated Carbonyl Iron Particles[J].Materials Review,2010,24(2). |
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| Authors: | ZHU Yunbin QING Yuchang JIA Shu ZHOU Wancheng LUO Fa ZHU Dongmei |
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| Abstract: | The surface of carbonyl iron particles is coated by SiO_2,and the effects of SiO_2 coating on the thermal,electromagnetic and microwave absorbing properties of carbonyl iron panicles are investigated.The thermal analysis result shows that the SiO_2 coating can obviously improve the anti-oxidation property of the carbonyl iron particles.Both the complex permittivity and permeability of the carbonyl iron particles decrease after being coated with SiO_2.The microwave absorbing properties of the coatings show that the good microwave absorption ability (blow-10dB) can obtain in the frequency range of 8.2～12.4GHz when the mass content of SiO2 coated carbonyl iron particles is 70% and the coating thickness is 1.8mm. |
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| Keywords: | SiO_2 carbonyl iron particles SiO_2 electromagnetic property microwave absorbing property |
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