氟橡胶包覆层对纳米铝粉性能的影响研究.

In order to obtain the influence of coating layers on the properties of nano-aluminum powders, the nano-aluminum powders prepared by the electric explosion method are coated with 5%, 10% and 15% of fluororubber. The surface morphologies, coating thicknesses, specific surface areas, elemental valence states and thermal responses of modified nano-aluminum powders are characterized using scanning electron microscope, transmission electron microscope, physical adsorption analyzer, X-ray photoelectron spectrometer and simultaneous thermal analyzer. And the active aluminum contents and combustion heat of different samples were measured. The results show that the specific surface areas of the modified nano-aluminum powders are slightly large than that of the passivated nano-aluminum powders. Fluororubber coatings chemically adsorb on the surface of nano-aluminum powders, which enhances the thermal stability of nano-aluminum powders, prevents the aluminum powders from further oxidation, and makes one of the contents of active aluminum up to 85.85%. The fluororubber promotes the combustion of modified nano-aluminum powders, so that the combustion heat of the modified nano-aluminum powders is more than that of the passivated nano-aluminum powders. [ABSTRACT FROM AUTHOR]