What is the purity of argon gas?

The purity of argon is usually expressed in the unit "9," where each "9" represents the percentage of pure argon in the gas. Thus, "four nines" means that the purity of the argon is 99.99% (99.99% pure), and "five nines" means that the purity of the argon is 99.999% (99.999% pure). The main difference between these two types of purity is the amount of impurities in the argon, and there are fewer impurities in high-purity argon.

Here are the specific differences:

(1) Argon containing 99.99% purity of four 9s:

It contains only 0.01% impurities. These impurities may include nitrogen, oxygen, moisture, grease, and other impurities. Although not as high purity as argon (e.g. 99.999% or higher), it is still widely used in many applications. Here are some common four 9 argon use scenarios:

In the welding process, 99.99% pure Ar is commonly used for TIG (Ar Arc Welding) and MIG (Metal Gas Welding) welding. This argon gas is used as a shielding gas to effectively prevent oxygen and other impurities from entering the welding area, ensuring that the welded joint is cleaner and stronger.

In the process of metal cutting, argon is widely used, especially in plasma cutting. Its role is mainly as a protective gas for cutting flame to ensure the accuracy and quality of cutting.

Scientific laboratories typically use pure argon containing four nines as a source of laboratory gas. This argon gas can be used as a carrier gas in various laboratory techniques, including gas chromatography (GC), liquid chromatography (LC), gas chromatography mass spectrometry (GC-MS), and other analytical methods to ensure the accuracy of experimental results.

Metal treatment: In the process of metal smelting and treatment, argon with a purity of 99.99% can be used to protect metals from oxidation or as a metal quenching gas.

In semiconductor manufacturing, although it is more common to use higher purity gases, there are still specific steps where four Class 9 argon can be used, such as cleaning and gas shielding applications.

Laboratory atmosphere control: In the laboratory, four 9-purity argon can be used to create a specific atmosphere, such as an inert atmosphere, for laboratory reactions or storage.

Atmosphere control can extend the shelf life of food, and 4 9 argon can be used as an atmosphere control gas in food packaging, preservation and storage.

It should be noted that even if four 9-purity argon is not as good as high-purity argon, it still provides sufficient purity and quality to meet general industrial and laboratory needs. The choice of argon purity should be based on the requirements of the specific application.

2, 5 9 purity of 99.999% argon:

Its impurity content is very low, only 0.001%. This means higher purity, making it ideal for applications where gas purity is critical. It is commonly used in high-precision experiments, semiconductor production, optical applications, and other industrial and research areas where extremely high purity gases are required.

Semiconductor manufacturing: In the semiconductor industry, high-purity argon is one of the most important materials for semiconductor production processes such as gas protection, etching, ceramic cleaning and lithography. The use of high-purity argon can ensure the quality and performance of semiconductor chips.

Applications in lasers and optics: High purity argon is widely used in laser cooling, gas lasers, spectral analysis, and laboratories manufacturing precision optical components.

In metal welding and cutting, high-pure Ar gas is often used for TIG (Ar Welding) welding to obtain high-quality welding joint and reduce the generation of porosities and impurities. In addition, high-purity argon can also be used as a cutting gas during metal cutting.

In some biomedical fields, such as mass spectrometers, nuclear magnetic resonance (NMR) and gas chromatography (GC), it is necessary to use high purity argon as carrier or shielding gas to ensure the accuracy of analysis and detection.

Electron microscope: In transmission electron microscope (TEM) and scanning electron microscope (SEM), we use high purity argon to condense and maintain the cleanliness of the sample environment to prevent the sample from being contaminated.

In the production process of optical fiber, it is necessary to use high-purity argon to protect the material to ensure the quality of optical fiber.

In laboratory research, high-purity argon can be used as a gas shield, cooling gas, carrier gas, and carrier gas for gas analysis.

In the nuclear industry, high-purity argon is used in the cooling, control and protection systems of nuclear reactors to ensure the safety and stability of the nuclear reaction process.

It should be emphasized that the production and supply of high-purity argon must be strictly controlled to ensure its quality. These applications often have very high requirements for gas purity, as even minute impurities can affect the accuracy and reliability of the experimental or manufacturing process.

In general, the higher the purity of the argon, the lower the content of impurities. Therefore, in some applications with very high purity requirements, such as semiconductor manufacturing and precision instrument manufacturing, higher purity argon is used. However, in general laboratory applications or industrial welding, lower purity argon is usually used. The purity of the selected argon should be determined according to the actual application requirements.