Liquid argon is liquid argon, the chemical formula is Ar, is a colorless, tasteless, non-toxic inert gas, and it is also the most abundant rare gas in the air.
In the preparation of liquid argon, the most commonly used is the air separation method, which is to separate nitrogen, oxygen and other gases in the air to obtain liquid argon.Main downstream applications of liquid argon:
1. Photovoltaic and electronics industries
As an inert gas, liquid argon is mostly used as a protective gas for polysilicon and monocrystalline silicon in the photovoltaic industry to prevent polysilicon and monocrystalline silicon from being oxidized, thereby affecting the quality of polysilicon and monocrystalline silicon. In the semiconductor and electronics industry, a super-clean working environment is often required, and liquid argon can be used as a protective gas to protect components from impurity gas pollution.
2, stainless steel industry
In the process of steelmaking, blowing argon into molten steel can even the chemical composition of molten steel, and can remove impurity gases such as oxygen and nitrogen in molten steel, prevent the oxidation of molten steel, and improve the quality of steelmaking. At the same time, argon blowing can also shorten the smelting time and reduce energy consumption.
3, metal cutting and welding
In aerospace, shipbuilding and other fields need to use stainless steel and magnesium, copper, aluminum alloy, and these special alloys welding and cutting, often use argon arc welding. Argon is used as a protective gas to prevent oxidation or nitriding by air during welding and cutting, thereby improving the quality of cutting and welding.
4. Others
In addition to the above applications, liquid argon can also be used in medical fields, such as the treatment of skin diseases, through low temperature freezing to kill specific tissue cells, so as to achieve therapeutic effects; Food industry, the use of low temperature fast frozen food, food lock fresh; Lighting industry, used for lamp tube gas filling, extend product life.
