Uses of helium gas

1. Helium can be used as a pressurizing agent and pressurizing agent for rocket liquid fuel, and is widely used in missiles, spacecrafts and supersonic aircraft.

2. Helium is used as a protective gas during smelting and welding, which is very important in shipbuilding and the manufacturing of aircraft, spacecraft, rockets and weapons.

3. Helium has excellent permeability and is used for cooling of nuclear reactors, leak detection of some pipelines of rockets and nuclear reactors, and electronic and electrical devices.

4. Helium is a gas with ideal gas properties and is an ideal gas for vapor pressure thermometers at extremely low temperatures.

5. Helium has low mass density and weight density and is non-flammable. It can be used to fill light bulbs and neon tubes. It is also an ideal gas for balloons and airships.

6. Liquid helium can achieve low temperatures close to absolute temperature (-273°C) and is used to manufacture superconducting equipment.

7. Helium is an inert gas with lower solubility in blood than nitrogen, so its anesthetic properties are lower than nitrogen. Therefore, helium is often mixed with oxygen and used as a breathing gas for divers.