Study On Energetic Ink Of Nano-thermites Or Inkjet Print Rapid Prototyping Technology

The Al/CuO nano-thermites which prepared were analysed surface morphology and reactiveness by XRD, SEM, TEM and DSC means, and were ignited by semiconductor bridge to choose the optimized pyrotechnics formula. The energetic material ink was prepared by the optimized pyrotechnics formula, which applied to inkjet print equipment This paper researched the inkjet print shaping technique of energetic material ink, and initially explored the thermal properties, combustion properties, electrical properties of the printed shaping film. All of these researches lay the foundation for the miniaturization and intellectualization of initiating explosive decices.The main researches and conclusions are as follows:(1)Ultrasonic method and sol-gel method were used to prepare pure phase Al/CuO nano-thermites. SEM and TEM were applied to respectively test, the result indicates:the materials were simply mixed by ultrasonic method, the diameter of Al is45.8nm, and CuO is29.03nm by Scherrer formula. Al/CuO formed the reunion sphere which has similar core-hell structure by sol-gel method, the diameter of reunion sphere is about25μm, and the particle size of Al and CuO is46.84nm,30.47nm in the sphere by Scherrer formula.(2)The surface of the nano-Al/CuO was modified. The influence for the type of dispersant, the calanination temperature, and surface modifiers on the surface morphology of the nano-Al/CuO was studied, using the orthogonal experiment of three factors and two levels. The result indicates that the influence of dispersing agent is most.(3)In order to study its thermal properties, Al/CuO nano-thermites were prepared by different ways. The DSC analysis indicates:when the component of Al is less, the core-hell structure of Al/CuO limited energy transmission by sol-gel method, its heat release is little. When the chemical ratio of Al and CuO is4:3, the heat release of Al/CuO nano-thermites by sol-gel method is higher than that by ultrasonic method.The pyrotechnics were ignited the semiconductor bridge, the results indicate that Al/CuO which prepared by sol-gel method have a high heat release when the chemical ratio of Al and CuO is4:3.(4)By using inkjet printing to prepare the energetic material ink, printing shaping film on the substrate and have it DSC analysing which can get it’s activation energy is about186.92kJ/mol.(5)The energetic material ink was printted on the composite metallic bridge to make plane structure’s initiating device chips, and the ignition explement was displayed. The energetic material ink can be ignited but can’t be combusted sustainedly.Have the energetic material ink which inkjets on the semiconductor bridge the ignition test under different situations, constrained and unconstrained, repectively. The experiments indicate that:the energetic material ink can be ignited under constrained situation and it can’t be ignited under unconstrained situation.