Eur. Phys. J. Appl. Phys.
Volume 69, Number 3, March 2015
|Number of page(s)||6|
|Section||Plasma, Discharges and Processes|
|Published online||12 March 2015|
Preheated ignition and work function studies on alkaline earth metal oxides coated tungsten electrodes of fluorescent lamps
Institut für Physik, Lehrstuhl für Experimentalphysik II, Universität Augsburg, Universitätsstr. 1, 86159
2 OSRAM AG, Berliner Allee 65, 86136 Augsburg, Germany
a e-mail: email@example.com
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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