Chemical equilibrium calculations of tungsten–halogen systems
- 1 August 1983
- journal article
- Published by AIP Publishing in Journal of Applied Physics
- Vol. 54 (8) , 4605-4613
- https://doi.org/10.1063/1.332616
Abstract
The performance of the compound bromotrifluoromethane (CBrF3) as a tungsten–halogen bulb fill gas was evaluated theoretically by chemical equilibrium calculations. It was found to be an ideal fill gas in terms of maintaining clear bulb walls and redepositing evaporated tungsten on hot spots in the filament. The calculations were done at different CBrF3 and water concentrations. The compounds most responsible for tungsten transport were identified; fluorine compounds of tungsten dominate over bromine compounds. Finally, CBrF3 is compared to other possible fill gases such as CBr2F2, CBr3F, CBr4, and also HBr, since HBr is presently used commercially.This publication has 14 references indexed in Scilit:
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