Pressure-dependent electron attachment and breakdown strengths of unary gases and synergism of binary gas mixtures: A relationship

Journal Article · Wed May 01 04:00:00 EDT 1985 · J. Appl. Phys.; (United States)

DOI:https://doi.org/10.1063/1.334598· OSTI ID:5994939

Hunter, S R; Christophorou, L G

The relationship between the pressure-dependent electron attachment rate constants which have been observed in 1-C/sub 3/F/sub 6/ and in several perfluoroalkanes and the uniform field breakdown strengths (E/N)/sub lim/ in these gases is discussed. Also discussed are the various types of synergistic behavior in (E/N)/sub lim/ which have been observed in binary dielectric gas mixtures. For the latter, a new mechanism is outlined which explains the synergism observed in several gas mixtures where the (E/N)/sub lim/ values of the mixtures are greater than those of the individual gas constituents, which we call positive synergism. Model calculations are presented which support this mechanism and can be used to explain the pressure-dependent synergistic effects which have been reported in 1-C/sub 3/F/sub 6//SF/sub 6/ and other gas mixtures. Experimentally observed ion--molecule reaction processes for several gases are discussed which support the proposed mechanism. Based on this mechanism, we outline several conditions which must be fulfilled in order to observe positive synergistic behavior in dielectric gas mixtures.

• Research Organization: Atomic, Molecular, and High Voltage Physics Group, Health and Safety Research Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831
• DOE Contract Number: AC05-84OR21400
• OSTI ID: 5994939
• Journal Information: J. Appl. Phys.; (United States), Journal Name: J. Appl. Phys.; (United States) Vol. 57:9; ISSN JAPIA
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201 -- Chemical & Physicochemical Properties
400301* -- Organic Chemistry-- Chemical & Physicochemical Properties-- (-1987)
640304 -- Atomic
Molecular & Chemical Physics-- Collision Phenomena
74 ATOMIC AND MOLECULAR PHYSICS
BINARY MIXTURES
BREAKDOWN
CARBON COMPOUNDS
CARBON FLUORIDES
COLLISIONS
DIELECTRIC MATERIALS
DISPERSIONS
ELECTRIC POTENTIAL
ELECTRON ATTACHMENT
FLUORIDES
FLUORINATED ALIPHATIC HYDROCARBONS
FLUORINE COMPOUNDS
HALIDES
HALOGEN COMPOUNDS
HALOGENATED ALIPHATIC HYDROCARBONS
ION COLLISIONS
ION-MOLECULE COLLISIONS
IONIZATION
MATERIALS
MIXTURES
MOLECULE COLLISIONS
ORGANIC COMPOUNDS
ORGANIC FLUORINE COMPOUNDS
ORGANIC HALOGEN COMPOUNDS
PRESSURE DEPENDENCE
SULFUR COMPOUNDS
SULFUR FLUORIDES