Although rare gases are rare and chemically inactive, they have many special abilities and can be used in the high-tech field.
The boiling point of liquid helium is-269℃, which is the most difficult of all gases to liquefy. Using liquid helium, ultra-low temperatures close to absolute zero (-273.15℃) can be achieved. Therefore, liquid helium can be used for the research of various ultra-low temperature technologies, and liquid helium with temperatures below-271℃ will become a superfluid with many abnormal properties such as superconductivity and low viscosity, which is important for research. Cutting-edge science and technology are of great significance.
When neon gas is electrified in the lamp tube, it will emit red light, which is highly mist transparent, so neon lamps are often used as light signs in ports, airports and other places. Neon gas is also used in lasers, insulation detectors, high-frequency electroscopes and other occasions, and is used as a low-temperature coolant, special gas mixtures, etc.
Argon gas produces charged particles under irradiation with high-energy rays. Using this principle, people have developed argon counters for use on spacecraft and satellites. The signals obtained by the counters can determine the position and intensity of the radiation belt in space.
Krypton gas is often filled in arc lamps. Krypton gas absorbs X-rays, so it is also used as a blocking material for X-rays. In medicine, the isotope of krypton can be used as a tracer, and radioactive krypton can also be used for leak detection of closed containers and measurement of material thickness. Even more amazing is that atomic lamps made from the radioactive isotope krypton (Kr-85) do not require electricity.
Xenon has strong ultraviolet radiation and can be used in photodegradation and other photocatalytic research, as well as in the medical field to prepare anesthetics without side effects. In the atomic energy industry, xenon can also be used to detect the existence of high-speed particles.
Lasers with various mixed gases can also be made from rare gases, such as "helium-neon lasers". These lasers can be used in high-tech measurement and communications fields.