推进剂是一类为火箭发动机提供能源和工质的物质(工质即吸收初始能源释放出采的能量从而使之做功的物质)。按它们的物理状态可分为液体、固体和固液混合三种类别。目前用于军事的推进剂主要为固体推进剂。因为使用固体推进剂的固体火箭发动机具有结构简单、作用可靠、精度高、维护方便、发射准备时间短、使用安全等一系列优点,从 Propellants are a class of substances that provide energy and working fluid to a rocket engine (ie, a substance that absorbs energy from an initial energy source to release it for work). According to their physical state can be divided into liquid, solid and liquid-liquid mixture of three categories. The current military propellant is mainly solid propellant. Because the solid rocket motor using solid propellant has the advantages of simple structure, reliable function, high precision, convenient maintenance, short preparation time for launching, safety in use and the like,