The Activation And Charactization Of Micro-Boron

This article mainly use the wet ball milling and coat aluminum powder and magnesium powder method to activate the long-term storage micron boron powder. The influence of the different solvents, different ball material ratio, different particle size and different content on the boron combustion performance is researched. The results show that the pure wet ball milling makes the boron powder oxidation weight dropped to40%from43%, but after the ball milling the biggest burning rate increased by29%than that of the new boron powder delay composition. For magnesium coated boron powder, n-hexane as solvent, the ball material ratio of30, the effect is best, the weight gain is7%higher than raw boron, heat release increased by129%, the main reaction temperature is66.8℃in advance. For aluminum coated boron powder, when aluminum powder particle size is200nm, aluminum powder content is15%, the ball material ratio of30, anhydrous ethanol as solvent, the weight gain increased by121%and the heat release increased by444%compared with the raw boron, but the main reaction peak temperature has no obvious change, the burning rate is411%higher than the new boron delay composition. For magnesium aluminum coated boron powder, when magnesium aluminum total content is15%and ethanol as solvent the coating effect is best, main reaction temperature is39.2℃in advance than raw boron, the oxidation weight gain increased by60%, the heat release increased by30%, the largest burning rate is8%higher than that of new boron.In conclusion, the effect of nanometer aluminum coated boron is best, the aluminum content is15%, the ball material ratio of30, solvent of anhydrous ethanol.