Statistics – Applications
Scientific paper
Jan 1999
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999aipc..458.1444f&link_type=abstract
Space technology and applications international forum -1999. AIP Conference Proceedings, Volume 458, pp. 1444-1451 (1999).
Statistics
Applications
Thermionic Conversion, Thermionic Emission
Scientific paper
Refractory metal oxides such as NbOx, WOx, MoOx, TaOx, PtOx and Silver oxide (AgOx) have been studied for an oxygenated thermionic converter and a low work function collector. The metal oxide materials were deposited on metal substrates by RF sputtering in the Ar/O2 gas mixture to fabricate collector electrodes. Work function values of the collector electrodes were evaluated by cesium plasma immersion technique. Very low work function values were obtained, for instance 1.25V as φC of AgOX. A research thermionic energy converter with a plane parallel type of a polycrystalline W emitter and the metal oxide collectors (AgOX, NbOX and PtOX), was set up and the power generation experiments were conducted. In the case of the W-AgOX thermionic converter, the barrier index VB was 2.05 V. Similarly VB=2.15 V for the W-NbOX converter, VB=2.25 V for the W-PtOX converter.
Fukuda Ryuzo
Kasuga Yasuhiro
Kato Ken
Shimizu Sadaaki
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