Low-burning-temperature and high-burning-rate solid propellant and preparation method thereof

Abstract

The invention discloses a low-burning-temperature and high-burning-rate solid propellant which comprises the following raw materials in percentage by weight: 31-37 percent of 5-amino tetrazole, 60-66 percent of strontium nitrate, 1-3 percent of a burning rate modifier and 0.5-1 percent of a plasticizer. The invention further discloses a preparation method of the low-burning-temperature and high-burning-rate solid propellant. The preparation method comprises the following steps: performing wet ball-milling by taking the 5-amino tetrazole and the strontium nitrate as raw materials and taking modified nanometer metal oxide as the burning rate modifier, removing a solvent, grinding, forming through mold pressing and then drying till constant weight. The low-burning temperature and high-burning rate solid propellant disclosed by the invention has the benefits that the burning performance of the solid propellant is greatly improved, the preparation process is simple, the operation is easy, the obtained solid propellant is low in burning temperature, high in burning rate, low in burning rate pressure index, low in decomposition temperature and good in thermal stability, a combustion product has good slagability, and the effect of the low-burning temperature and high-burning rate solid propellant is superior to that of a conventional 5-amino tetrazole solid propellant.

Description

technical field [0001] The invention relates to the technical field of solid propellants, in particular to a solid propellant with low burning temperature and high burning rate and a preparation method thereof. Background technique [0002] At present, halon fire extinguishing agent is the most widely used, and has the advantages of high fire extinguishing efficiency, no residue after fire extinguishing, low toxicity, and good diffusion performance. However, the product halon produced by it is more destructive to the ozone layer, which limits the use of halon fire extinguishing agent. The "Montreal Protocol on the Depletion of the Ozone Layer" is a global agreement on the specific control of substances that deplete the ozone layer. According to this convention, my country has expressly stipulated that the production of various halon fire extinguishing agents has been stopped since January 1, 2010. After the signing of the "Montreal Protocol" and other international conventi...

AI Technical Summary

Problems solved by technology

Too fast a burning rate may lead to uncontrolled combustion of the solid propellant in the reactor of the fire extinguishing device, even reaching deflagration, which brings danger to the use of personnel and equipment in the protected space; too low a burning rate will make the solid propellant The gas production rate is greatly reduced, which slows down the injection of fire extinguishing agent and weakens the fire extinguishing efficiency

At present, although there are some reports on improving the combustion performance of solid propellants, they have not been able to effectively increase the burning rate and enhance combustion stability while reducing the combustion temperature, and the process is relatively complicated, which does not greatly improve the combustion performance of solid propellants.

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