Abstract: Nanoparticle bismuth oxide is prepared by a solution method, and then Al/Bi₂O₃ is self-assembled using P4VP. The samples are characterized by XRD, SEM, DSC, and P-t curve. The reaction time of self-assembled Al/Bi₂O₃ is 0.036 s, the maximum pressure is 4 729 kPa, and the time corresponding to the pressure peak is 0.162 s. The results show that Al/Bi₂O₃ has the advantage of rapid reaction over Al/Fe₂O₃ and Al/CuO. After accelerated aging test, aluminium powder and bismuth oxide powder contact with each other more closely without obvious agglomeration. After aging, it is equivalent to store for 15 years at room temperature, the oxide layer thickness of aluminium powder is increased from 3.2 nm to 4.6 nm, Al/Bi₂O₃ heat release is gradually reduced from 1 112 J/g to 606 J/g, the ignition time of semiconductor bridge is increased from 37.20 ms to 50.88 ms, and the ignition energy is increased from 0.64 mJ to 1.17 mJ.

Key words: ordnance science and technology, nano Al/Bi₂O₃, self-assembly, ignition performance, long-term storage