Sulfur hexafluoride gas has a history of 100 years. It is an artificial inert gas synthesized by two French chemists, Moissan and Lebeau, in 1900. Currently, it is mainly used in the electric power industry.

Sulfur hexafluoride gas is used for 4 types of electrical equipment as insulation or arc extinguishing; Here, it refers to sulfur hexafluoride enclosed composite apparatus, which is internationally known as gas insulated switchgear, SF6 load switchgear, insulated transmission lines, transformers and insulated substations.

About half of the 8500 tons of sulfur hexafluoride gas produced annually in the world is used in the power industry. In the power industry, high-voltage switchgear accounts for more than 80% of the gas volume. The gas consumption of medium voltage switch accounts for about 1/10. It is mainly used in 126~252kV high voltage and 330~800kV ultra-high voltage fields, especially in 126kV~252kV~550kV circuit breakers, sulfur hexafluoride enclosed composite appliances, gas filling cabinets, and sulfur hexafluoride insulated pipeline buses.

Sulfur hexafluoride gas is colorless and odorless, and its density is higher than that of air. From the video below, it can be seen that SF6 is deposited at the bottom of the container because its density is higher than that of air.

Have you ever wondered or worried about what would happen if you or others inhaled sulfur hexafluoride? The reality is that when the human body inhales sulfur hexafluoride, sulfur hexafluoride will fill around the vocal cords. When we make a sound and the vocal cords vibrate, it is sulfur hexafluoride that is not the air we usually speak that is driven to vibrate. Because the molecular weight of sulfur hexafluoride is larger than the average molecular weight of air, and the vibration frequency is lower than that of air, there will be a deeper sound than usual.

You may ask: can other gases with higher molecular weight than air achieve this effect? The answer is yes, and different densities of gas will produce different sound changing effects! However, the premise is that sulfur hexafluoride is non-toxic, and many magic gases with large molecular weight are toxic. So, please don't try to use other gases to change your voice!

Special attention should be paid to the fact that people may suffer from hypoxia and asphyxia due to lack of oxygen in an environment full of sulfur hexafluoride gas, which is dangerous.

High purity sulfur hexafluoride gas has excellent insulation and arc extinguishing performance. The arc on the discharger will extinguish rapidly in the high-purity sulfur hexafluoride gas, which is also an intuitive manifestation of SF6's excellent insulation and arc extinguishing performance.

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