NDLI: 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

Content Provider	IEEE Xplore Digital Library
Author	Pradayrol, C. Casanovas, A. Casanovas, J.
Copyright Year	1996
Description	Author affiliation: Univ. Paul Sabatier, Toulouse, France (Pradayrol, C.)
Abstract	The spark decomposition of SF/sub 6/ and SF/sub 6/+ 50% CF/sub 4/ mixtures was studied at a gas pressure of 200 kPa. The sparks were generated between a point and a plane either under 50 Hz AC voltage (0.09 J per spark) or by discharging a capacitor (3.59 J per spark). The authors' attention was only focused on the gaseous SF/sub 6/ by-products: SOF/sub 2/+SF/sub 4/, SOF/sub 4/, SO/sub 2/F/sub 2/, S/sub 2/F/sub 10/, S/sub 2/OF/sub 10/, S/sub 2/O/sub 2/F/sub 10/ and S/sub 2/O/sub 3/F/sub 6/ which were assayed by gas chromatography. Their yields were studied varying the cell preparation technique, the metal constituting the plane electrode (aluminum, copper, stainless-steel) and the concentrations of two additives, O/sub 2/ (between 0 and 1%) and H/sub 2/O (between 0 and 0.2%). The cell preparation procedure had a strong effect on the formation of all products except SOF/sub 2/+SF/sub 4/. The aluminum led, whatever the procedure used, to the highest levels of products. With SF/sub 6/ as well as with the SF/sub 6/+50% CF/sub 4/ mixtures and whatever the spark energy, an increase of the oxygen content led to a decrease of SOF/sub 2/+SF/sub 4/ and S/sub 2/F/sub 10/ production rates and to an increase of that of SOF/sub 4/+SO/sub 2/F/sub 2/. Moreover, an increase of the H/sub 2/O content induced a lowering of the S/sub 2/F/sub 10/ production rate and an increase of those of SOF/sub 2/+SF/sub 4/ and SOF/sub 4/+SO/sub 2/F/sub 2/. With the SF/sub 6/+50% CF/sub 4/ mixture the by-products production rates were lower (10 to 50% depending on the by-product considered and on the O/sub 2/ or H/sub 2/O concentration) than those measured with pure SF/sub 6/.
Starting Page	823
Ending Page	827
File Size	385765
Page Count	5
File Format	PDF
ISBN	0780335317
ISSN	1089084X
DOI	10.1109/ELINSL.1996.549471
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1996-06-16
Publisher Place	Canada
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Sparks Production Aluminum AC generators Voltage Capacitors Gas chromatography Electrodes Copper Additives
Content Type	Text
Resource Type	Article

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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

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