2. High purity helium gas can be used as a pressurized gas for conveying liquid propellants such as liquid hydrogen and liquid oxygen in high vacuum devices and nuclear reactors on rockets and spaceships. High purity helium is also used as a cleaner in atomic reactors

3. High purity helium gas has been widely used in superconducting technology, maglev train in transportation industry and nuclear magnetic resonance imaging equipment in medical field. Liquid helium can be used for ultra-low temperature cooling by using its low boiling point of -268.9 ° C. Ultra-low temperature cooling technology has a wide range of applications in the field of superconducting technology, superconducting materials need to be at a low temperature (about 100K) to show superconducting properties, in most cases only liquid helium can be relatively simple to achieve such a very low temperature.

helium cylinders and hydrogen gas cylinders

4. High-purity helium is often used as carrier gas in gas chromatography analysis. Due to the characteristics of good permeability and non-combustibility of helium, high-purity helium is also used in vacuum leak detection, such as helium mass spectrometer leak detector.

5. Industrial helium is widely used in balloon inflating. Because the density of helium is much lower than that of air (the density of air is 1.29kg/m3, and the density of helium is 0.1786kg/m3), and its chemical properties and inactivity, helium is safer than hydrogen (hydrogen can be reburned in the air, which may cause an explosion), helium is often used in spaceships or advertising balloons to fill the gas.

6, in the Marine development field of respiratory gas mixture, gas thermometer filling gas, etc.