类花状ZnO-CoFe_2O_4复合纳米管束的制备及其电磁波吸收特性  

Preparation and electromagnetic wave absorption of flower-like ZnO-CoFe_2O_4 nanotube bundles composites

作　　者：付乌有[1] 曹静[1] 李伊荇[1] 杨海滨[1] 

机构地区：[1]吉林大学超硬材料国家重点实验室

出　　处：《物理学报》2011年第6期683-690,共8页Acta Physica Sinica

基　　金：高等学校博士学科点专项科研基金(批准号:200801831006)资助的课题~~

摘　　要：在90℃水溶液中采用两步晶体生长法制备出类花状ZnO-CoFe2O4复合纳米管束.ZnO纳米管束的管壁厚度大约为60nm,管的直径大约为350nm,CoFe2O4纳米颗粒连续包覆在ZnO纳米管束的表面,CoFe2O4纳米颗粒尺寸小于40nm,壳层厚度随着CoFe2O4在ZnO-CoFe2O4复合纳米管束中相对含量的增加而增加.分别以CoFe2O4纳米颗粒、ZnO-CoFe2O4复合纳米管束及类花状ZnO纳米管束作为吸收剂、酚醛树脂为粘接剂研究了它们的微波吸收性能,结果表明ZnO-CoFe2O4纳米复合材料微波吸收性能优于纯相的CoFe2O4纳米颗粒和类花状ZnO,当ZnO含量占总含量60%时微波吸收效果最佳,最大反射损失达到28dB.Flower-like ZnO-CoFe2O4 nanotube bundle composites are prepared via two-step crystal growth process in water solution at 90 ℃,the wall thicknesses of the ZnO nanotubes are all about 60 nm,inner diameters of the tubes are all about 350 nm,ZnO nanotubes have been coated with CoFe2O4 nanoparticles,and the sizes of CoFe2O4 nanoparticles are below 40 nm.The thickness of CoFe2O4 coating layer increases with the increase of the content of CoFe2O4 in ZnO-CoFe2O4 composites.By using Flower-like ZnO,flower-like ZnO-CoFe2O4 nanotube bundles and CoFe2O4 nanoparticles as absorbents,and phenolic resin as the binder,their electromagnetic wave absorption properties are investigated,and the results show that the microwave wave absorbing performance is evidently improved compared with that of ZnO nanotube bundles and CoFe2O4 particles.When the content of ZnO is 60%,the maximum reflection loss is 28.3 dB.

关 键 词：类花状 ZnO-CoFe2O4 纳米管束 微波吸收剂 

分 类 号：TB383.1[一般工业技术—材料科学与工程]