Study On Granulation Technology Based On Mg/PTFE Infrared Decoy

Aiming at the problems of high radiation temperature of the existing magnesium /polytetrafluoroethylene(Mg/PTFE)infrared bait agent and the difficulty of achieving large area radiation,the method of granulating the Mg/PTFE and then burning was used to study the preparation of Mg/PTFE particles.The effect of the process and the process parameters on the state of the particles,the optimal preparation process was obtained,and then the Mg/PTFE bait modified with various additives was granulated.Finally,the combustion and infrared radiation properties of the bait after pelletization were studied.Based on the basic theory of the properties of Mg/PTFE and interface chemistry,the mechanism of preparing Mg/PTFE particles was analyzed,and the material composition of the granulation process was determined.Mg/PTFE/NC was prepared by volatilization method and leaching method,respectively.Granules,combined with the requirements of bait agents and the properties of the granules,the volatilization method was selected as the granule preparation process.In order to optimize the preparation process of Mg/PTFE/NC particles,the effects of the preparation process on the physical properties of Mg/PTFE/NC particles were studied from the aspects of NC content,solvent ratio,dehydrating agent and other factors.The results show that the particle size of Mg/PTFE/NC particles increases with the increase of NC content,decreases with the increase of the solvent ratio,and satisfies a linear relationship with the solvent ratio of y =-31.7x + 1249.0.The density of Mg/PTFE/NC particles decreases with the increase of NC content,increases with the increase of the concentration of the dehydrating agent,and gradually increases to a stable value and then does not increase.In order to study the applicability of the volatilization process to additive-modified Mg/PTFE bait,the preparation process of Mg/PTFE/NC particles of different types of additives was studied,and the influence of different types of additives on particle properties was obtained..The results show that the effects of inorganic metal and metal compound additives on Mg/PTFE/NC particles are small;the effects of inorganic non-metal and non-metal compound additives on the appearance,particle size,and particle density of particles are significant.The addition of Si makes the The average particle size of the base particles increased from 898.33μm to 1209.77μm.In organic additives,the addition of additive A has almost no effect on the particles,but the addition of urotropine increased the particle size from 898.33μm to 1512.45μm,and the morphology of the particles also changed to a large extent.A large amount of PTFE was added.It will also have a greater impact on the morphology of the particles.Aiming at the combustion radiation performance of the granulated medicament,a far-infrared thermal imager was used to test and study the combustion radiation temperature and radiation area.The results showed that the radiation area of Mg/PTFE/NC particles was 27.1% higher than that of MTV bait agent.The average infrared radiation temperature has decreased.In addition,from the perspectives of particle size,Mg category,Mg/PTFE ratio and additives,the influence of them on the radiation performance of particles in the long-range waveband is analyzed.