New unitary and multicomponent gaseous dielectrics

Conference · Tue Jan 01 04:00:00 EST 1980

OSTI ID:5506466

James, D R; Christophorou, L G; Mathis, R A

Studies were continued on unitary gases and gas mixtures in order to determine the effects of basic physical properties - such as electron attachment, electron scattering, and electron-impact ionization - on the breakdown strength of gaseous dielectrics. The uniform field dc breakdown strengths (relative to SF/sub 6/ of 1) of some of the new unitary gases investigated are: 0.80, 1.32, 2.5, 2.5, 0.94, 0.41, 1.16, and 0.94 for C/sub 2/F/sub 6/, n-C/sub 4/F/sub 10/, 1,1,1-CC1/sub 3/CF/sub 3/, 1,1,2-CC1/sub 2/FCC1F/sub 2/, OCS, 1,1,1-CH/sub 3/CF/sub 3/, C/sub 2/C1F/sub 5/, and 1-C/sub 3/F/sub 6/, respectively. Mixtures of electron attaching and electron thermalizing gases have been studied with emphasis on optimizing the contribution of the electron thermalizer to the dielectric strength of a multicomponent gas mixture. Results are presented on mixtures containing electron attaching gases, such as SF/sub 6/, 2-C/sub 4/F/sub 6/, and c-C/sub 4/F/sub 8/, and dipolar electron slowing-down components, such as CHF/sub 3/, CH/sub 2/F/sub 2/, and 1,1,1-CH/sub 3/CF/sub 3/, which exhibited synergistic behavior. Similar behavior was exhibited by the binary mixtures SF/sub 6//1-C/sub 3/F/sub 6/, c-C/sub 4/F/sub 8//1-C/sub 3/F/sub 6/, and SF/sub 6//OCS. These and earlier studies demonstrate the important role of electron scattering processes at subexcitation energies in effecting synergistic behavior in dielectric mixtures and in tailoring gaseous dielectrics for industrial application.

• Research Organization: Oak Ridge National Lab., TN (USA)
• DOE Contract Number: W-7405-ENG-26
• OSTI ID: 5506466
• Report Number(s): CONF-800301-2
• Country of Publication: United States
• Language: English

Related Subjects

200302* -- Power Transmission & Distribution-- DC Systems-- (1989-)
24 POWER TRANSMISSION AND DISTRIBUTION
BREAKDOWN
CARBON COMPOUNDS
CARBON FLUORIDES
CHEMICAL PROPERTIES
DATA
DATA FORMS
DC SYSTEMS
DIELECTRIC MATERIALS
DISPERSIONS
ECONOMICS
ELECTRICAL EQUIPMENT
ELECTRICAL INSULATORS
ELECTRON ATTACHMENT
EQUIPMENT
EXPERIMENTAL DATA
FLUIDS
FLUORIDES
FLUORINE COMPOUNDS
FREONS
GASES
GRAPHS
HALIDES
HALOGEN COMPOUNDS
HALOGENATED ALIPHATIC HYDROCARBONS
INFORMATION
MATERIALS
MIXTURES
NUMERICAL DATA
ORGANIC COMPOUNDS
ORGANIC HALOGEN COMPOUNDS
PHYSICAL PROPERTIES
POWER SYSTEMS
POWER TRANSMISSION
REFRIGERANTS
RESEARCH PROGRAMS
SULFUR COMPOUNDS
SULFUR FLUORIDES
TABLES
WORKING FLUIDS