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Abstract
In order to solve the reserve stability problem of pyrotechnic explosives containing magnesium powder, a coating method named rapid expansion of supercritical fluid is studied. Continuous coating film of paraffin can be formed on the surface of magnesium powder when paraffin content is about 1.5%. Humidity resistance property of the coated magnesium is promoted obviously. The flame sensitivity of the coated magnesium is 4.8% lower than that of the original magnesium powder after mixed with oxidant. The burning velocity of the coated magnesium is 4.7% lower than that of the contrastive sample. This method may be used to enhance the reserve stability problem of pyrotechnic explosives and the safety of magnesium powder modifying process.
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