Nanomaterials Modified Tungsten Type Delay The Pilot Study Of The Drug

Tungsten type delay composition was prepared by dry-mixing method and acetone mixing method, through the addition of nano-TiO₂, nano-LaCoO₃, nano-Fe₂O₃, nano-CuO, nano-Cr₂O₃, thermal decomposition and combustion capability of tungsten type delay composition were studied.The nature of nanomaterials was tested by XRD and Electron Microscope, thermal decomposition characteristics of tungsten type delay composition were studied by TG and DTA methods. The results show that the initial decomposition temperature of tungsten type delay was reduced by adding nano-Fe₂O₃, nano-TiO₂ and nano-LaCoO₃, exothermie reaction was concentrated and exothermic quantity was increased by adding nano-Fe₂O₃ and nano-TiO₂, exothermic reaction was scattered by adding nano-LaCoO₃ and nano-CuO, the thermal decomposition characteristics of tungsten type delay was not due to accretion content of nanomaterials, but exothermic quantity increased as the granularity of nano-CuO.Conflagrant capability of Tungsten type delay composition were studied by burning rate, calorific value and sensitivity analytical measurements. The results indicated that burning rate of tungsten delay composition was accelerated by nano-TiO₂, nano-Fe₂O₃, and improved adjusting to content of nano-TiO₂, but not nano-Fe₂O₃. The burning rate of tungsten type delay composition was increased by adding nano-size 20.1 nm CuO, while decreased by adding nano-size 20.9nm and 22.5nm CuO. The delay charge has been burnt reliably with the content of nano-Cr₂O₃. The calorific value of tungsten type delay maximum was appeared in adding the cocatalyzer nano-Fe₂O₃ and nono-CuO. Ignition characteristic of tungsten type delay composition was improved by adding nano-Fe₂O₃ and nano-TiO₂.