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Combustion, Explosion and Shock Waves

2013 year, number 1

Experimental Investigations of the Controlled Explosive Synthesis of Ultrafine Al2O3

R. Y. Li, X. J. Li, H. H. Yan, J. Peng
Keywords: ultrafine Al2O3, phase, explosive synthesis, explosive parameter


The relation between the parameters of mixed explosives [combinations of Al(NO3)3 × 9H2O powder, RDX powder, and/or polyethylene foaming particles] and the phase and dimension of ultrafine Al2O3 is studied in this paper. Experimental results indicate that mixed explosives with a high density of 1.8 g/cm3 are adapted to prepare high-temperature α-A2O3. Ultrafine (α + γ)-Al2O3 with α-phase dominance is synthesized by the detonation of charges with a medium-high density of 1.3 g/cm3. Explosives with a medium-low density of 0.8 g/cm3 synthesize low-temperature pure γ-Al2O3.