聚硅氮烷包敷纳米铁磁粉PSZFe的合成及其雷达波吸收性能研究  

PREPARATION AND MICROWAVE-ABSORBING PROPERTY OF NANOSIZE PSZFe MAGNETIC PARTICLES

作　　者：刘爱祥[1] 茹淼焱[1] 孟凡君[1] 张维咸[1] 张其震[1] 周其凤[2] 

机构地区：[1]山东大学化学与化工学院,济南250100 [2]北京大学高分子系,北京100871

出　　处：《高分子学报》2003年第5期757-760,共4页Acta Polymerica Sinica

摘　　要：The preparation and micwave-absorbing behavior of nanosize PSZFe magnetic particles were studied.Nanosize PSZFe magnetic particles were prepared as following:nanosize Fe particles generated by themal decomposition of Fe(CO)-5 in organic solvents were encapsulated with synthesized polysilazane(PSZ) precursor and then irradiated under ultraviolet light.PSZFe particles were characterized by using transmission election microscope(TEM),X-Ray powder diffraction(XRD) and vibrating sample magntometer(VSM),and their microwave-adsorbing properties were measured by means of a vector network analyzer.The influence of the polysilazation layer on corrosion and magnetization of PSZFe particles and the relationship between polysilazation layer and micwave-absorbing behavior of PSZFe particles were investigated.Results showed that the average diameter of PSZFe particles was 30 nm,the structure of iron in PSZFe magnetic particles was α-Fe.The formation of a PSZ layer on nanosize Fe particles enchanced the corrosion resistance of PSZFe.In addition,PSZFe particles coated with 3 wt% PSZ demonstrated high corrosion resistance and fine microwave-absorbing ability as well.The reflection loss was less than -10 dB in the range of 9^8～16 GHz,and a reflection loss value of -20 dB was detected at 13 GHz.The preparation and micwave-absorbing behavior of nanosize PSZFe magnetic particles were studied. Nanosize PSZFe magnetic particles were prepared as following: nanosize Fe particles generated by themal decomposition of Fe(CO), in organic solvents were encapsulated with synthesized polysilazane(PSZ) precursor and then irradiated under ultraviolet light. PSZFe particles were characterized by using transmission election microscope (TEM) X-Ray powder diffraction (XRD) and vibrating sample magntometer(VSM), and their microwave-adsorbing properties were measured by means of a vector network analyzer. The influence of the polysilazation layer on corrosion and magnetization of PSZFe particles and the relationship between polysilazation layer and micwave-absorbing behavior of PSZFe particles were investigated. Results showed that the average diameter of PSZFe particles was 30 nm, the structure of iron in PSZFe magnetic particles was alpha-Fe. The formation of a PSZ layer on nanosize Fe particles enchanced the corrosion resistance of PSZFe. In addition, PSZFe particles coated with 3 wt% PSZ demonstrated high corrosion resistance and fine microwave-absorbing ability as well. The reflection loss was less than - 10 dB in the range of 9.8 similar to 16 GHz, and a reflection loss value of - 20 dB was detected at 13 GHz.

关 键 词：聚硅氮烷 纳米铁磁粉 PSZFe 合成 雷达波 吸收性能 吸波材料 结构 性能 金属磁性材料 

分 类 号：TB34[一般工业技术—材料科学与工程]