Aerospace and Defense

Rocket propellant: Liquid oxygen is the main oxidizer in rocket engines, and it is mixed with fuels (such as liquid hydrogen, kerosene, and methane) to generate huge thrust.

Aviation oxygen supply system: liquid oxygen vaporization provides pilots with oxygen for high-altitude breathing. Some airliners use liquid oxygen systems as emergency oxygen supply schemes.

Missiles and scramjets: liquid oxygen enhances fuel combustion efficiency. Experimental hypersonic vehicles may use liquid oxygen as an oxidizing agent.