Electron Mobility and Effective Ionization Coefficients in SF6-CO2 Mixtures

  • J. de Urquijo
  • E. Basurto
  • J. L. Hernández-Ávila


Because of the potentially serious greenhouse effects that SF6 may cause on the atmosphere, efforts are being made to find gaseous substitutes that would retain many of the outstanding properties of this gas as a high voltage insulator and, at the same time being more environmentally friendly. Thus, intensive research has been carried out on SF6 mixed with other gases1-3 such as SF6-Ar, SF6-N2, SF6-He, SF6-CH4, SF6-CHF3, and SF6-CO2. In particular, the latter mixture has a higher minimum impulse breakdown voltage than pure SF 6 4 , and therefore it could be a good substitute for some insulation applications.


Electron Drift Velocity Electron Avalanche Electron Transit Insulation Application High Voltage Insulator 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.


  1. 1.
    L.G. Christophorou and J.K. Olthoff, NIST Technical Note 1425,(1997).Google Scholar
  2. 2.
    J. de Urquijo, C. Cisneros, I. Alvarez and E. Basurto , Ionization and attachment in mixtures of SF6, with He, Ar, CH4 and CO2, XXIV ICPlG. 67–68, (1999).Google Scholar
  3. 3.
    J. de Urquijo, E. Basurto, C Cisneros and I. Alvarez, Ionization, attachment and electron drift in SF6,-He mixtures. ICAMDATA 2000, 6, (2000).Google Scholar
  4. 4.
    X. Q. Qiu, I. D. Chalmers and P. Coventry, A study of alternative insulating gases to SF6, J. Phys. D, 32, 2918–2922, (1999).CrossRefGoogle Scholar
  5. 5.
    J. de Urquijo, C. Arriaga, I. Alvarez and C. Cisneros, J. Phys. D, 32, 41–45, (1999).CrossRefGoogle Scholar
  6. 6.
    H. Raether, Electron Avalanches and Breakdown in Gases, ButterworthS.London, (1964).Google Scholar
  7. 7.
    Th. Aschwanden, PhD. Diss. ETH Zurich, (1985).Google Scholar
  8. 8.
    J. de Urquijo, E. Basurto and J.L. Hernandez-Avila, Electron drift velocities and effective ionization coefficients in SF6-CHF3 mixtures, to be presented at XXV ICPIG (2001), Nagoya.Google Scholar

Copyright information

© Springer Science+Business Media New York 2001

Authors and Affiliations

  • J. de Urquijo
    • 1
  • E. Basurto
    • 2
  • J. L. Hernández-Ávila
    • 2
  1. 1.Centro de Ciencias FísicasUNAMCuernavacaMéxico
  2. 2.CBIUAM-AMéxico

Personalised recommendations