Skip to main content
OSTI.GOVU.S. Department of Energy Office of Scientific and Technical Information
U.S. Department of Energy
Office of Scientific and Technical Information
 

Positive ions observed in sparked SF/sub 6/ and SF/sub 6/-containing mixtures at 40 kPa

Conference ·
OSTI ID:6497980
; ; ;

Because of its high dielectric strength, SF/sub 6/ is finding increasing acceptance by industry as an insulator in high voltage equipment. Although SF/sub 6/ itself is inert and nontoxic, some of the products of its decomposition under electrical stress are highly reactive and toxic. A mass spectrometer with a high pressure spark ion source was assembled to study the decomposition of SF/sub 6/ and other dielectric gases. The results are discussed. The mass spectrum of positive ions produced in the spark ion source with dielectric grade SF/sub 6/ (99.6% purity, by volume) at 40 kPa was dominated by ions containing impurities. The most intense ions, N/sub 2/O/sub 2/F/sup +/, S/sub 2/NF/sub 4//sup +/, SO/sub 2/F/sub 5//sup +/, S/sub 2/NOF/sub 4//sup +/, and S/sub 2/NO/sub 2/F/sup +/, have been identified by their isotope ratios. Among the less intense ions are H/sub 2/SOF/sub 2//sup +/, N/sub 2/F/sub 4//sup +/, S/sub 2/F/sub 7//sup +/, S/sub 2/NF/sub 8//sup +/, and S/sub 4/NF/sub 6//sup +/. The addition of 1% O/sub 2/ to SF/sub 6/ greatly intensified the SO/sub 2/F/sub 5//sup +/ peak, while the addition of 1% N/sub 2/ resulted in enhanced intensities for the N/sub 2/O/sub 2/F/sup +/, S/sub 2/NF/sub 4//sup +/, S/sub 2/NOF/sub 4//sup +/, S/sub 2/NO/sub 2/F/sub 4//sup +/, S/sub 2/NF/sub 8//sup +/, and S/sub 4/NF/sub 6//sup +/ ions. The addition of D/sub 2/O to the SF/sub 6/ resulted in new peaks in the mass range 89 through 92 u, confirming the assignment of the 88 u peak to H/sub 2/SOF/sub 2//sup +/. (WHK)

Research Organization:
Oak Ridge National Lab., TN (USA)
DOE Contract Number:
W-7405-ENG-26
OSTI ID:
6497980
Report Number(s):
CONF-810548-4
Country of Publication:
United States
Language:
English

Similar Records

Studies of spark decomposition products of SF/sub 6/ and SF/sub 6//perfluorocarbon mixtures
Conference · Thu Dec 31 23:00:00 EST 1981 · OSTI ID:5404149
Influence of O{sub 2} and H{sub 2}O on the spark decomposition of SF{sub 6} and SF{sub 6} + 50% CF{sub 4} mixtures
Conference · Mon Dec 30 23:00:00 EST 1996 · OSTI ID:529645
Negative ion formation in SF/sub 6/ spark by-products
Conference · Sat Dec 31 23:00:00 EST 1983 · OSTI ID:6970612

Related Subjects

200300 -- Electric Power Engineering-- Power Transmission & Distribution-- (-1989)
24 POWER TRANSMISSION AND DISTRIBUTION
656000* -- Condensed Matter Physics
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
AC SYSTEMS
CATIONS
CHARGED PARTICLES
CHEMICAL REACTIONS
CURRENTS
DECOMPOSITION
DISPERSIONS
ELECTRIC ARCS
ELECTRIC CURRENTS
ELECTRIC DISCHARGES
ELECTRIC POTENTIAL
ELECTRICAL EQUIPMENT
ELECTRICAL INSULATORS
ENERGY SYSTEMS
EQUIPMENT
FLUORIDES
FLUORINE COMPOUNDS
HALIDES
HALOGEN COMPOUNDS
HVAC SYSTEMS
IMPURITIES
IONS
LOW PRESSURE
MASS SPECTROMETERS
MASS SPECTROSCOPY
MEASURING INSTRUMENTS
MIXTURES
POWER SYSTEMS
SPARK MASS SPECTROMETERS
SPECTROMETERS
SPECTROSCOPY
SULFUR COMPOUNDS
SULFUR FLUORIDES