固体燃料火箭发动机的构造更简单、分量更轻，而且相对更安全。 在固体燃料火箭发动机里，燃料和氧化剂被预先混合成稳定的液态推进剂，然后被塞满火箭发动机的燃料箱里。
Solid-fuel rockets, in which the fuel and oxidiser are pre-mixed into a stable, solid propellant and then packed inside the case of the rocket, are simpler, lighter and relatively safer.
用水合硝酸盐作氧化剂、以尿素为燃料 ，根据推进化学计算原料的配比 ，进行了复相PSZ超细陶瓷粉的低温燃烧合成 。
Multi phase PSZ micro_powders were prepared by low temperature combustion synthesis (LCS) method, with which nitrates were used as oxidizers while urea as fuels.
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