类花状ZnO-CoFe2 O4 复合纳米管束的制备及其电磁波吸收特性

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60 nm,管的直径大约为350 nm,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40 nm, 壳层厚度随着CoFe₂O₄在ZnO-CoFe₂O_{4关键词：类花状2}O₄')" href="#">ZnO-CoFe₂O₄纳米管束微波吸收剂

Preparation and electromagnetic wave absorption of flower-like ZnO-CoFe2 O4 nanotube bundles composites

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.