Self-assembly Synthesis And Performance Of Two Thermites

In order to meet the requirement of combustion stability and combustion speed flexibility of igniting powder which can be used in tiny structure ignition and MEMS ignition, preparation of nano-oxidant and self-assembly oxidant and combustible are studied in this paper. The main contents were as follows:Iron oxide nanoring was prepared by hydrothermal method. The outer diameters of iron oxide was200-240nm, inner diameters was90-120nm, and heights was120-150nm. The regulation to control the size and morphology of iron oxide was investigagted. The heat release of aluminum/iron oxide nanoring, aluminum/iron oxide nanosphere, aluminum/micron iron oxide were1448J/g,1090J/g,517J/g, and flame length of the first two system were4.4cm,2.7cm. It was characterized of prominent advantage once iron oxide particles reach to the nano-scale or in the shape of ring structure.Iron oxide nanoring and aluminum were self-assembled and aluminum was filled in the inside and outside of nanorings. The heat release, flame length, combustion wave velocity and pressure of the composite were2039J/g,7.2cm,0.93m/s,2280KPa,respectively. And flame sensitivity, impact sensitivity, friction sensitivity, electrostatic sensitivity were studied. The performance of the composite was assessed. The performance of self-assembled composites was more excellent. These results indicated that self-assembly method was an excellent way for the performance improvement and reducing aggregation.Copper oxide in the shape of nanoflower and nanosphere was prepared by template. Aluminum/copper oxide nanoflower and aluminum/copper oxide nanosphere were self-assembled. The heat release and pressure of self-assembled aluminum-copper oxide nanoflower was1068.6J/g,4389KPa.The performance of the composite was more excellent than that one of others. Ignition capability of the two MIC was evaluated by comparision with red lead/zirconium and3#black power.