Under normal temperature and pressure, sulfur hexafluoride at dawn appears as a gas, and is a high-pressure liquid after bottling. It is colorless, odorless, non-toxic, nonflammable, and has good chemical and thermal stability.

In recent years, Liming sulfur hexafluoride has shown its importance in many production technology fields. It is a special gas urgently needed by many departments such as scientific research and production in China. It is used for plasma etching process in semiconductor industrial towel and as spacer dopant in optical fiber manufacturing. It is also an important laser material and has important applications in other fields.

In the microelectronics industry, sulfur hexafluoride (SF6) at Liming is commonly used as a cleaning gas and an etching gas. In the production process of optical fibers, sulfur hexafluoride (SF6) is also commonly used as a dopant for the isolation layer of single film optical fibers. It can significantly improve the high-temperature insulation performance of PTFE. However, poisons are sometimes produced in electrical equipment. Therefore, it is necessary to keep in mind which situations will produce poison. Here we will list some for reference.

1. Dawn sulfur hexafluoride in electrical equipment produces some toxic products when high-temperature arc occurs.

2. Sulfur hexafluoride gas and decomposition products in electrical equipment react with electrodes (Cu-W alloy) and metal materials (AL, Cu) to generate some toxic products.

3. The decomposition products of high-purity sulfur hexafluoride gas in electrical equipment react with the water in them to produce some toxic products.

4. The product is impure and contains highly toxic sulfur fluoride, hydrogen fluoride and other toxic gases.

5. Sulfur hexafluoride gas and decomposition products in electrical equipment react with insulating materials to generate some toxic products. For example, insulating parts such as epoxy phenolic glass fiber cloth board (rod, tube) containing silicon; Or epoxy resin casting parts, molded parts, porcelain bottles, silicone rubber, silicone grease, etc. filled with quartz sand and glass play a chemical role to generate SiF4, Si (CH3) 2F2 and other products.

The content of the article comes from high-purity sulfur hexafluoride: http://www.feiliergas.com