| Issue |
Eur. Phys. J. Appl. Phys.
Volume 69, Number 3, March 2015
|
|
|---|---|---|
| Article Number | 30801 | |
| Number of page(s) | 6 | |
| Section | Plasma, Discharges and Processes | |
| DOI | https://doi.org/10.1051/epjap/2015140468 | |
| Published online | 12 March 2015 | |
https://doi.org/10.1051/epjap/2015140468
Preheated ignition and work function studies on alkaline earth metal oxides coated tungsten electrodes of fluorescent lamps
1
Institut für Physik, Lehrstuhl für Experimentalphysik II, Universität Augsburg, Universitätsstr. 1, 86159
Augsburg, Germany
2
OSRAM AG, Berliner Allee 65, 86136
Augsburg, Germany
a e-mail: reinhard.langer@physik.uni-augsburg.de
Received:
27
November
2014
Revised:
15
January
2015
Accepted:
22
January
2015
Published online:
12
March
2015
This paper describes measurements on the alkaline earth (Ba, Sr, Ca) oxide layers utilized as emitting material in fluorescent lamp electrodes. In a first approach we compared the emission capabilities of the different materials (BaO, SrO and CaO coatings on tungsten filaments) by their ability to facilitate the start of a lamp. In a second investigation the work function was measured quantitatively by means of a Kelvin probe. Basically, the results of both measurements coincide. The impact of sample geometry on measurement results of a Kelvin probe applied for work function measurements of lamp electrodes are discussed in detail.
© EDP Sciences, 2015
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