Explanation

In most cases, it can combustion (self supplying oxygen) in isolation from the outside air, and produce a mechanical mixture of light, heat, smoke, sound or gas and other different pyrotechnic effects. It is usually composed of oxidizer, combustible agent and adhesive, and some have additives. It is used in military to load incendiary bombs, decoy bombs, flares, smoke bombs and signal bombs to achieve special object effects, and it is used in folk to manufacture fireworks, firecrackers, etc. The properties mainly depend on its composition. The linear combustion speed is related to the density, and the linear combustion speed varies greatly with different varieties, such as several tenths of a millimeter per second for smoke composition/smoke agent; The illuminating composition is 210mm per second. Its combustion temperature, combustion heat and composition of combustion products have great influence on the pyrotechnic effect. Most pyrotechnic powders are easily hygroscopic and sensitive to static electricity and mechanical effects, especially friction. Commonly used oxidizer include chlorate, perchlorate, nitrate, chromate, peroxide, oxide, gasification substance, etc. The oxidizer decomposes into oxygen at high temperature, which causes the oxidation reduction reaction of combustibles to form rapid combustion.

Classification