The invention discloses a nearly spherical core-shell structure composite
energetic material and a preparation method thereof. Recrystallization is carried out by a
solvent-non-
solvent method, and dihydroxylammonium 5,5'-bistetrazole-1,1'-diolate is sheared by a
colloid mill to obtain nearly spherical dihydroxylammonium 5,5'-bistetrazole-1,1'-diolate particles;
ammonium perchlorate is dissolved inwater, the dihydroxylammonium 5,5'-bistetrazole-1,1'-diolate particles are added into an
ethanol /
ethyl acetate mixed
solvent and stirred, an
ammonium perchlorate aqueous solution is dripped into dihydroxylammonium 5,5'-bistetrazole-1,1'-diolate suspension, and the
ammonium perchlorate is saturated and separated out to obtain the core-shell structure composite
energetic material with the ammoniumperchlorate tightly
coating the dihydroxylammonium 5,5'-bistetrazole-1,1'-diolate. The composite
energetic material prepared by the method provided by the invention has the advantages of high
bulk density, low sensitivity and high explosion heat, and can effectively improve the explosion heat of the dihydroxylammonium 5,5'-bistetrazole-1,1'-diolate and improve the
oxygen balance of the dihydroxylammonium 5,5'-bistetrazole-1,1'-diolate.