Greenhouse Gas Sulfur Hexafluoride - China

Sulfur hexafluoride (SF6) is an inorganic, colorless, odorless, and non-

flammable greenhouse gas.

SF6 has an octahedral geometry, consisting of

six fluorine atoms attached to a central sulfur atom.

It is a

hypervalent molecule.

Typical for a nonpolar gas, it is poorly soluble

in water but soluble in nonpolar organic solvents.

It is generally

transported as a liquefied compressed gas.

It has a density of 6.12 g/L

at sea level conditions, which is considerably higher than the density

of air (1.225 g/L).

SF6 is used in the electrical industry as a gaseous

dielectric medium for high-voltage circuit breakers, switchgear, and

other electrical equipment, often replacing oil filled circuit breakers

(OCBs) that can contain harmful PCBs.

SF6 gas under pressure is used as

an insulator in gas insulated switchgear (GIS) because it has a much

higher dielectric strength than air or dry nitrogen.

SF6 is used to

provide a tamponade or plug of a retinal hole in retinal detachment

repair operations in the form of a gas bubble.

It is inert in the

vitreous chamber and initially doubles its volume in 36 hours before

being absorbed in the blood in 10-14 days.

Sulfur hexafluoride was the

tracer gas used in the first roadway air dispersion model calibration;

this research program was sponsored by the U.S. Environmental Protection

Agency and conducted in Sunnyvale, California on U.S. Highway 101 - SF6

plasma is also used in the semiconductor industry as an etchant.

SF6

breaks down in the plasma into sulfur and fluorine, the fluorine plasma

performing the etching.

The magnesium industry uses large amounts of SF6 as inert gas to fill casting forms.

Sulfur hexafluoride is also used to pressurize waveguides in radar systems.

The gas insulates the waveguide preventing internal arcing.

The same use of sulfur hexafluoride is applied in transmission waveguides of medical linear accelerators, which are used for delivery of external beam radiotherapy.

Sulfur hexafluoride has been used in electrostatic loudspeakers because of its high dielectric strength and high molecular weight.

Sulfur hexafluoride has been used to fill tyres of racing cars in professional events due to its non-flammability and high density.

Company Contact:

• Posted By: Central China Special Gas Co., Ltd.

• Phone: 867348755678

• Address: Jiefang Rd, Hengyang , China

• Email:

• Website: http://www.ccsg.cn

• Business Description: Central China Special Gas (CCSG) Co., Ltd is specialized on gas
  
  industry; our main product is industrial gases, specialty gases, gases
  
  equipments.
  
  With Chinese booming economy, CCSG now is one of the most
  
  active player on industrial and specialty gas in China.
  
  CCSG's products
  
  including:
  
  
  
  Fluorogases: SF6, HF, CHF3, CF4, C2F6, C3F8, C4F8
  
  Hydrocarbons: CH4, C2H4, C2H6, C3H6, C3H8
  
  Rare gases: Helium, Neon, Argon, Krypton, Xenon
  
  Calibration Standard Gases, mixtures
  
  Other gases: D2, CO, H2, SO2, Cl2, HCL, N2O, NO, NO2.