![]() However, the dense aluminum oxide (Al 2O 3) shell layer of aluminum powder always hinders its oxidation reaction of aluminum core during the combustion process of solid propellants. ![]() Thus, it is widely used as metal fuel in solid propellants to increase the density and energy of propellants. The mechanism studies show that the pre-reaction of Al and coating layer Cu(PFO) 2 can corrode the alumina shell of Al particles, and promote the internal aluminum to participate in the oxidization reaction.Īluminum powder (Al) has the excellent comprehensive performances in terms of combustion calorific value, density, oxygen consumption, etc. In addition, the good coating effect of Cu(PFO) 2 on the surface of Al particles endows %- Cu(PFO) 2 better electrical ignition properties than that of 15%-PTFE/micro-Al. Combustion results show that the higher the content of Cu(PFO) 2, the faster the combustion rate of aluminum and the higher combustion efficiency of aluminum. The ignition temperature of micro-Al decreases by at least 249 ☌ when the coating layer content exceeds 10 wt%. Compared with pure micron Al powder, the ignition and combustion performances of (PFO) 2 are significantly enhanced due to the intimate contact and the pre-reaction of micro-Al and Cu(PFO) 2. TG-DSC results show that a pre-reaction of aluminum and coating layer Cu(PFO) 2 occurs at about 317 ☌, and the oxidation degree of the Al particle in %- Cu(PFO) 2 composite particles is 2.2 times that of the pure Al particles. The hydrothermal method can obtain Cu(PFO) 2 with a high purity of about 98%, and the prepared (PFO) 2 configurations have a good core-shell structure. ![]() The structure and microscopic morphology of Cu(PFO) 2 and the micron-Al coated with Cu(PFO) 2 (named as core- shell (PFO) 2 configurations) are characterized. In this study, copper perfluorooctanoate (Cu(PFO) 2 ) is firstly synthesized by hydrothermal method, and is used to coat micron-Al by solvent evaporation method. Improvements of the ignition and combustion performance of aluminum powder are very beneficial to enhance the combustion efficiency of aluminum powder. ![]()
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