Preparation of mono-dispersed, high energy release, core/shell structure Al nanopowders and their application in HTPB propellant as combustion enhancers.

ABSTRACT: Mono-dispersed, spherical and core/shell structure aluminum nanopowders (ANPs) were produced massively by high energy ion beam evaporation (HEIBE). And the number weighted average particle size of the ANPs is 98.9 nm, with an alumina shell (3-5 nm). Benefiting from the passivation treatment, the friction, impact and electrostatic spark sensitivity of the ANPs are almost equivalent to those of aluminum micro powders. The result of TG-DSC indicates the active aluminum content of ANPs is 87.14%, the enthalpy release value is 20.37 kJ/g, the specific heat release S ₁/Δm ₁* (392-611 °C) which determined the ability of energy release is 19.95 kJ/g. And the value of S ₁/Δm ₁* is the highest compared with ANPs produced by other physical methods. Besides,

SUBMITTER: Wang F 

PROVIDER: S-EPMC5507889 | biostudies-literature | 2017 Jul

REPOSITORIES: biostudies-literature