THE FORMATION OF A ZIRCONATE PHASE WITHIN THE EMISSION MIX FOR LOW-PRESSURE HG-AR DISCHARGE LAMPS

Citation
J. Shi et al., THE FORMATION OF A ZIRCONATE PHASE WITHIN THE EMISSION MIX FOR LOW-PRESSURE HG-AR DISCHARGE LAMPS, Journal of the Illuminating Engineering Society, 24(1), 1995, pp. 100
Citations number
15
Categorie Soggetti
Optics
ISSN journal
00994480
Volume
24
Issue
1
Year of publication
1995
Database
ISI
SICI code
0099-4480(1995)24:1<100:TFOAZP>2.0.ZU;2-K
Abstract
It was discovered in the early 1950s that vaporization of barium from the cathode in a fluorescent lamp can be reduced tremendously with the addition of zirconium oxide to the coating mix. The lamp industry has been using this added material (Zr or ZrO2) since then. However, the reason for this improvement is poorly understood. In this paper, it is shown by using x-ray diffraction that a barium-strontium zirconate ph ase forms under conditions that mimic different lamp operating charact eristics. The formation of this compound may be related to the observe d improvements in lamp properties.