Preparation and Properties of Superfine ANPyO/HMX Mischcrystal Explosive

To increase the energy output of superfine ANPyO/HMX,the ANPyO/HMX mischcrystal were prepared by solvent/non-solvent recrystallization method and water suspension method.The performance of the mischcrystal were characterized by SEM,XRD,IR.The specific surface area,vacuum stability,impact sensitivity,shock wave sensitivity,detonation velocity and flyer initiating sensitivity were measured.Results show that the shift phenomenon for XRD and IR characteristic peak of superfine mischcrystal explosive indicates that intermolecular hydrogen bonding between amino group of HMX and nitro group of ANPyO is formed.The impact sensitivity of ANPyO/HMX mischcrystal explosive(mass ratio of ANPyO and HMX is 70∶30)is 138 cm and its vacuum stability is 1.72mL/g(200℃)and 4.50mL/g(250℃).When charge density of superfine mischcrystal explosive powder is 1.84g/cm3,the shock sensitivity,detonation velocity and minimum initiation voltage are 7.1mm,8 080m/s and 2.91 kV,respectively,so it is a kind of superfine mischcrystal explosive with moderate sensitivity and high energy output and easy to be initiated by short pulse.