The Preparation,Charactercterization And Application In Micro-propulsion Array Of The Nano-thermite

With the successive development of micro satellite, the micro propulsion system is under urgent demand, and the MEMS digital solid microthruster has become a research hotspot. This paper aims at developing and studying on the ignition match of solid chemical micro-thruster and the micro-charge of micro-thruster,the principle conclusions are as follows:Four promising nano-thermites,Al/Bi2O3、Al/CuO、Al/Fe2O3 and Al/MoO3, were selected on the basis of fully understanding the preparation, characterization and applications of the nano thermite. And nano thermite Al/CuO was choosen as having the best thermal performance, ignition performance and combustion performance. CuO was synthetized by solid phase at room temperature and Al/CuO was prepared under ultrasonic with nano-Al and nano-CuO. Nano-Al/CuO and nano-CuO were characterized its structure and ignition performance. The results showed that CuO synthetized by solid-phase method was more lively and its diameter was about 100nm and nano-Al/CuO was mixed evenly under ultrasonic. Micro-charge method was optimized through ink-jet printing and wet pressure packing.Charge density was impove effectively in the method. Study on the influence of three energy ink carriers(NC,PVB and GAP) on charge and ignition property and combustion property was acomlished. The results showed that NC was the preferred energetic ink suitable for acting as a carrier. The ink-jet printing charge and wet-pressure charge were combined to optimize micro-charge method.The results show that it effectively improved the charge density.And NC was choosed selected as the best energetic ink carrier. The Φ value of thermite and the content of energetic ink carrier were researched by ignition experiments. The results show that the optimal thermite Φ value was 1.6 and the optimal carrier NC content was 7.5% and the measured average impulse was 145 μN · s in this pharmaceutical formulations.