1, helium is widely used in military, scientific research, petrochemical, refrigeration, medical, semiconductor, pipeline leakage detection, superconductivity experiments, metal manufacturing, deep sea diving, high precision welding, optoelectronic products production.
2. Cryogenic cold source: Utilizing liquid helium's low boiling point of -268.9℃, liquid helium can be used for ultra-low temperature cooling. And the ultra-low temperature cooling technology in the field of superconductivity technology and other fields have a wider application, superconducting materials need to be in the low temperature (100K or so) in order to show superconducting properties, most of the time only liquid helium can be relatively easy to realize such extremely low temperature. Superconductivity technology in the transportation industry of the magnetic levitation train, the medical field of nuclear magnetic **** vibration imaging equipment have greater applications.
3, balloon inflation: because helium density is much smaller than air (air density of 1.29kg/m3, helium density of 0.1786kg/m3), and the chemical nature of the extremely inactive, safer than hydrogen (hydrogen can be burned in the air, which may cause an explosion), helium is commonly used in airships or advertising balloons in the filling of the gas.