SiO_2包覆羰基铁的微波吸收性能研究  

Microwave Absorbing Properties of SiO_2 Coated Carbonyl Iron Particles

作　　者：朱云斌[1] 卿玉长[2] 贾舒[2] 周万城[2] 罗发[2] 朱冬梅[2] 

机构地区：[1]东南大学交通学院,南京210096 [2]西北工业大学凝固技术国家重点实验室,西安710072

出　　处：《材料导报》2010年第2期9-11,共3页Materials Reports

基　　金：凝固技术国家重点实验室(西北工业大学)自主研究课题(KP200901)

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。The surface of carbonyl iron particles is coated by SiO2, and the effects of SiO2 coating on the thermal, electromagnetic and microwave absorbing properties of carbonyl iron particles are investigated. The thermal anal ysis result shows that the SiO2 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 SiO2. 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.

关 键 词：羰基铁SiO2 电磁性能 吸波性能 

分 类 号：TB383[一般工业技术—材料科学与工程] O614.811[理学—无机化学]