High voltage research (breakdown strengths of gaseous and liquid insulators). Semiannual report, April 1--September 30, 1978
The work on gas dielectric mixtures continued to focus on carefully chosen combinations of electron attaching and electron slowing-down gases. Experimental evidence relating the electron attachment cross section to the dielectric strength is discussed. Conclusions are reached as to the relation of molecular structure to the electron attaching properties of dielectric gases. A variety of mixtures of SF/sub 6/, Ar, Ne, and N/sub 2/ have been studied to determine the relative importance of electron impact ionization and electron scattering on the breakdown voltage, V/sub s/. Electron scattering (especially in the subexcitation energy range) was found to influence V/sub s/ much more critically than electron impact ionization. Preliminary studies involving mixtures of the polar molecules (1,1,1-CH/sub 3/CF/sub 3/, CHF/sub 3/, and CH/sub 2/F/sub 2/ with SF/sub 6/ and N/sub 2/ showed that electron-dipole scattering does not significantly affect V/sub s/. Field-induced electron detachment from negative ions--which has often been cited as a possible cause of a host of phenomena in gas breakdown studies--has been investigated, and the results of this investigation are reported.
- Research Organization:
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- W-7405-ENG-26
- OSTI ID:
- 6782908
- Report Number(s):
- ORNL/TM-6659; TRN: 79-003010
- Country of Publication:
- United States
- Language:
- English
Similar Records
High voltage research (breakdown strengths of gaseous and liquid insulators) and environmental effects of dielectric gases. Semiannual report, April 1-September 30, 1980
High voltage research (breakdown strengths of gaseous and liquid insulators) and environmental effects of dielectric gases. Semiannual report, April 1-September 30, 1981
Related Subjects
ARGON
BREAKDOWN
CARBON FLUORIDES
DIELECTRIC MATERIALS
NEON
NITROGEN
SULFUR FLUORIDES
ELECTRON ATTACHMENT
ELECTRON COLLISIONS
GASES
IONIZATION
LIQUIDS
MIXTURES
RESEARCH PROGRAMS
CARBON COMPOUNDS
COLLISIONS
CRYOGENIC FLUIDS
DISPERSIONS
ELEMENTS
FLUIDS
FLUORIDES
FLUORINE COMPOUNDS
HALIDES
HALOGEN COMPOUNDS
NONMETALS
RARE GASES
SULFUR COMPOUNDS
360603* - Materials- Properties