Application of Helium in Life

Liquid helium has a low boiling point of -268.9℃, which can be used for ultra-low temperature cooling. Helium is indispensable in the application of superconductors, and has been widely concerned in the fields of suspension trains. In addition, helium is usually used as an inflation gas in spacecraft or advertising balloons, because it has low chemical activity and is lighter than air, and this use is also well known. Helium has been widely used in the mixed gas for breathing in the field of marine development and the cooling of superconducting electromagnets of nuclear magnetic resonance imaging equipment in the medical field: military industry, scientific research, petrochemical industry, refrigeration, medical treatment, semiconductors, pipeline leak detection, superconducting experiments, metal manufacturing, deep-sea diving, high-precision welding, photoelectric product production and so on. It can be used in low temperature cold source and superconducting technology. It can also be used as a leak detector for high vacuum devices, atomic nuclear reactors and spacecraft. And shielding gas for welding metals such as magnesium, zirconium, aluminum and titanium. Pressurized gas used to transport liquid propellants such as liquid hydrogen and liquid oxygen in rockets and spaceships. It is also used as cleaning agent for atomic reactors, carrier gas for gas chromatography analysis, shielding gas for balloon inflation, mixed gas for arc welding and diving, and filling gas for gas thermometers. In addition, due to its good permeability and incombustibility, helium is also used in vacuum leak detection industry, such as helium mass spectrometer leak detector.